Table of Contents 6- i

Section 6

Steering
CONTENTS

Precautions .................................................6-1 DTC Table...........................................................6C-6

Precautions............................................................. 6-1 Scan Tool Data ...................................................6C-8
Precautions on Steering........................................ 6-1 P/S System Symptom Diagnosis ........................6C-9
Serial Data Link Circuit Check ............................6C-9
Steering General Diagnosis.................... 6A-1 “EPS” Warning Lamp Does Not Come ON
Precautions...........................................................6A-1 at Ignition Switch ON but Engine Stop ............6C-11
Precautions for Steering Diagnosis..................... 6A-1 “EPS” Warning Lamp Come ON Steady and
Engine Start ....................................................6C-13
Diagnostic Information and Procedures............6A-2
DTC C1113 / C1117 /C1118: Torque
Steering Symptom Diagnosis.............................. 6A-2
Sensor Circuit Failure......................................6C-14
Steering Wheel and Column................... 6B-1 DTC C1114: Torque Sensor 5 V Power
Supply Circuit Failure ......................................6C-15
Precautions...........................................................6B-1
DTC C1119: Torque Sensor 12 V Power
Service Precautions of Steering Wheel and
Supply Circuit Failure ......................................6C-17
Column.............................................................. 6B-1
DTC C1121 / C1123 / C1124: VSS Circuit
Diagnostic Information and Procedures............6B-1 Failure .............................................................6C-19
Checking Steering Column for Accident DTC C1122: Engine Speed Signal Circuit
Damage ............................................................ 6B-1 Failure .............................................................6C-21
Repair Instructions ..............................................6B-2 DTC C1141 / C1142 / C1143 / C1145:
Steering Wheel and Column Construction .......... 6B-2 Motor Circuit Failure........................................6C-22
Steering Wheel Removal and Installation ........... 6B-2 DTC C1153: P/S Control Module Power
Contact Coil Cable Assembly Removal Supply Circuit Failure ......................................6C-23
and Installation .................................................. 6B-3 DTC C1155: P/S Control Module Failure ..........6C-25 6
Centering Contact Coil Cable Assembly ............. 6B-4 Inspection of P/S Control Module and Its
Contact Coil Cable Assembly Inspection ............ 6B-5 Circuits ............................................................6C-25
Steering Column Removal and Installation ......... 6B-5 Steering Wheel Play Check ..............................6C-28
Steering Column Inspection ................................ 6B-7 Steering Force Check .......................................6C-28
Steering Lower Shaft Removal and Repair Instructions ............................................6C-29
Installation ......................................................... 6B-7 Steering Gear Case Assembly Components ....6C-29
Specifications.......................................................6B-8 Tie-Rod End Boot On-Vehicle Inspection .........6C-30
Tightening Torque Specifications........................ 6B-8 Tie-Rod End Removal and Installation..............6C-30
Special Tools and Equipment .............................6B-8 Tie-Rod End Inspection.....................................6C-31
Special Tool ........................................................ 6B-8 Steering Shaft Joint On-Vehicle Inspection.......6C-31
Steering Gear Case Assembly Removal
Power Assisted Steering System........... 6C-1 and Installation ................................................6C-31
Precautions...........................................................6C-1 Steering Rack Boot Inspection..........................6C-33
Steering System Note .........................................6C-1 Tie-Rod / Rack Boot Removal and
Precautions in Diagnosing Troubles ...................6C-1 Installation .......................................................6C-33
General Description .............................................6C-1 Steering Rack Plunger Removal and
P/S System Description ......................................6C-1 Installation .......................................................6C-35
EPS Diagnosis General Description ...................6C-2 Steering Rack Plunger Inspection.....................6C-35
On-Board Diagnostic System Description...........6C-2 P/S Control Module Removal and
Schematic and Routing Diagram........................6C-3 Installation .......................................................6C-35
EPS System Wiring Circuit Diagram ...................6C-3 Torque Sensor Inspection .................................6C-36
Diagnostic Information and Procedures............6C-4 Motor Assembly Inspection ...............................6C-36
EPS System Check.............................................6C-4 Specifications .....................................................6C-37
“EPS” Warning Lamp Check ...............................6C-5 Tightening Torque Specifications......................6C-37
DTC Check .........................................................6C-6 Special Tools and Equipment ...........................6C-38
DTC Clearance ...................................................6C-6 Recommended Service Material .......................6C-38
6-ii Table of Contents

Special Tool ......................................................6C-38

 Precautions: 6-1

Precautions
Precautions
Precautions on Steering
S4RS0A6000001
Air Bag Warning
Refer to “Air Bag Warning: in Section 00”.

Air Bag System Service Warning

Refer to “Air Bag System Service Warning: in Section 00”.

Precautions for Steering Diagnosis

Refer to “Precautions for Steering Diagnosis: in Section 6A”.

Service Precautions of Steering Wheel and Column

Refer to “Service Precautions of Steering Wheel and Column: in Section 6B”.

P/S System Note

Refer to “Steering System Note: in Section 6C”.
6A-1 Steering General Diagnosis:

Steering General Diagnosis

Precautions
Precautions for Steering Diagnosis
S4RS0A6100001
Since the problems in steering involve several systems, they must all be considered when diagnosing a complaint. To
avoid using the wrong symptom, always road test the vehicle first. Proceed with the following preliminary inspection
and correct any defects which are found.
1) Inspect tires for proper pressure and uneven wear.
2) Raise vehicle on a hoist and inspect steering system for loose or damaged parts.
3) Spin front wheels. Inspect for out-of-round tires, out-of-balance tires, bent rims, loosen and/or rough wheel
bearings.
 Steering General Diagnosis: 6A-2

Diagnostic Information and Procedures

Steering Symptom Diagnosis
S4RS0A6104001

Condition Possible cause Correction / Reference Item

Hard steering Tire not adequately inflated Inflate tires to proper pressure.
Malfunction of power steering system Check and correct.
Bind in tie-rod end ball studs or lower Replace tie-rod end or front suspension arm.
ball joints
Disturbed front wheel alignment Check and adjust front wheel alignment.
Bind in steering column Repair or replace steering column.
Rack and pinion adjustment Check and adjustment rack and pinion torque.
Too much play in steering Wheel bearings worn Replace wheel bearing.
Loose steering gear case bolts Tighten gear case bolts.
Faulty steering gear case assembly Replace steering gear case assembly.
Worn steering shaft joints Replace joint.
Worn tie-rod ends or tie-rod inside ball Replace tie-rod end or tie-rod.
joints
Worn lower ball joints Replace front suspension control arm.
Rack and pinion adjustment Check and adjustment rack and pinion torque.
Poor returnability Bind in tie-rod end ball studs Replace tie-rod end.
Bind in ball joints Replace front suspension arm.
Bind in steering column Repair or replace steering column.
Disturbed front end alignment Check and adjust front end alignment.
Faulty steering gear case assembly Replace steering gear case assembly.
Tires not adequately inflated Adjust tire pressure.
Rack and pinion adjustment Check and adjustment rack and pinion torque.
Rack and pinion noise Loose steering gear case bolts Tighten steering gear case bolts.
(Rattle or chuckle) Rack and pinion adjustment Check and adjustment rack and pinion torque.
Faulty steering gear case assembly Replace steering gear case assembly.
Wander or poor steering Mismatched or uneven tires Replace or inflate tires to proper pressure.
stability Loosen ball joints and tie-rod ends Replace suspension arm or tie-rod end.
Faulty struts or mountings Replace strut or repair mounting.
Loose stabilizer bar Tighten or replace stabilizer bar or bush.
Broken or sagging springs Replace spring.
Rack and pinion adjustment Check and adjustment rack and pinion torque.
Disturbed front wheel alignment Check and adjust front wheel alignment.
Faulty steering gear case assembly Replace steering gear case assembly.
Erratic steering when Worn wheel bearings Replace wheel bearing.
braking Broken or sagging springs Replace coil spring.
Wheel tires are inflated unequally Inflate tires to proper pressure.
Disturbed front wheel alignment Check and adjust front wheel alignment.
Brakes not working in unison Check and repair brake system.
Leaking wheel cylinder or caliper Repair or replace wheel cylinder or caliper.
Warped discs Replace brake disc.
Badly worn brake linings Replace brake shoe lining.
Drum is out of round in some brakes Replace brake drum.
Defective wheel cylinders Replace or repair wheel cylinder.
6B-1 Steering Wheel and Column:

Steering Wheel and Column

Precautions
Service Precautions of Steering Wheel and Enabling Air Bag System
Column For enabling air bag system, refer to “Enabling Air Bag
S4RS0A6200001 System: in Section 8B”.
For service precautions, refer to “Precautions on Service
and Diagnosis of Air Bag System: in Section 8B”. Handling and Storage
For handling and storage, refer to “Precautions on
Service and Diagnosis Handling and Storage of Air Bag System Components:
For diagnosis and servicing, refer to “Precautions on in Section 8B”.
Service and Diagnosis of Air Bag System: in Section
8B”. Disposal
For disposal, refer to “Precautions on Disposal of Air
Disabling Air Bag System Bag and Seat Belt Pretensioner: in Section 8B”.
For disabling air bag system, refer to “Disabling Air Bag
System: in Section 8B”.

Diagnostic Information and Procedures

Checking Steering Column for Accident
Damage “a”
S4RS0A6204003
NOTE: “b”
Vehicles involved in accidents resulting in
body damage, where steering column has
been impacted or air bag deployed may have
a damaged or misaligned steering column.

Checking Procedure
1) Check that two capsules (1) are attached to steering
column bracket securely. If found loose, replace “c”
steering column assembly.

I4RS0A620002-

3) Check steering shaft joints and shaft for any

1
damages such as crack, breakage, malfunction or
excessive play.
If anything is found faulty, replace as lower shaft
assembly or steering column assembly.
1

I4RS0A620001-

2) Take measurement “a”, “b” and “c” as shown.

If it is shorter than specified length, replace steering
column assembly with new one.
Power steering column length
“a”: 454 ± 2 mm (17.8 ± 0.08 in.)
“b”: 64.1 ± 1 mm (2.5 ± 0.03 in.)
“c”: 306.7 ± 1 mm (12.0 ± 0.03 in.)

I4RS0A620003-
 Steering Wheel and Column: 6B-2

4) Check steering shaft for smooth rotation. 5) Check steering shaft and steering column for bend,
If found defective, replace as steering column cracks or deformation.
assembly. If found defective, replace.

Repair Instructions
Steering Wheel and Column Construction
S4RS0A6206009

4 (b)

3 (a)
14 (d) 7

2 1
10

5
6
9
8

2
11

13 (c)

12
15

I4RS0A620004-

1. Driver air bag (inflator) module 8. Steering column lower cover 15. Audio control switch (if equipped)
2. Steering wheel 9. Steering column : 9 N⋅m (0.9 kg-m, 6.5 lb-ft)
3. Driver air bag (inflator) module mounting bolt 10. Steering lock assembly (ignition : 33 N⋅m (3.3 kg-m, 24 lb-ft)
switch)
4. Steering wheel nut 11. Steering lower shaft : 25 N⋅m (2.5 kg-m, 18 lb-ft)
5. Contact coil cable assembly 12. Steering joint cover : 14 N⋅m (1.4 kg-m, 10.5 lb-ft)
6. Wiper switch and lighting switch 13. Upper and lower joint bolt
: After tightening lower joint bolt,
tighten upper joint bolt.
7. Steering column upper cover 14. Steering column mounting nut
: After tightening lower nut, tighten
upper nut.

Steering Wheel Removal and Installation Removal

S4RS0A6206001
CAUTION:
CAUTION:
Do not hammer the end of the shaft.
Do not turn the contact coil more than
Hammering it will loosen the plastic shear
allowable number of turns (about two and a
pins which maintain the column length and
half turns from the center position clockwise
impair the collapsible design of the column.
or counterclockwise respectively) with
steering wheel removed, or coil will break. 1) Disconnect negative (–) battery cable at battery
terminal.
2) Disable air bag system referring to “Disabling Air
Bag System: in Section 8B”.
6B-3 Steering Wheel and Column:

3) Remove driver air bag (inflator) module from

steering wheel. Refer to “Driver Air Bag (Inflator)
Module Removal and Installation: in Section 8B”.
4) Disconnect horn connector and audio control switch
connector, if equipped.
5) Remove steering shaft nut and then make alignment
marks (1) on steering wheel and shaft for a guide
during reinstallation.

I4RS0A620007-
I4RS0A620005-
4) Connect horn connector and audio control switch
6) Remove steering wheel using special tool.
connector, if necessary.
Special tool 5) Install driver air bag (inflator) module to steering
(A): 09944-36011 wheel. Refer to “Driver Air Bag (Inflator) Module
Removal and Installation: in Section 8B”.
6) Connect negative (–) battery cable.
7) Enable air bag system referring to “Enabling Air Bag
System: in Section 8B”.

Contact Coil Cable Assembly Removal and

Installation
S4RS0A6206002
(A)
CAUTION:
Do not turn contact coil more than allowable
I4RS0A620006-
number of turns (about two and a half turns
Installation from the center position clockwise or
counterclockwise respectively), or coil will
1) Check that vehicle’s front tires are at straight-ahead
break.
position and contact coil is centered. If contact coil is
turned after removing steering wheel, center contact
Removal
coil referring to “Centering Contact Coil Cable
Assembly: ”. 1) Disconnect negative (–) battery cable at battery
terminal.
CAUTION: 2) Disable air bag system referring to “Disabling Air
These two conditions are prerequisite for Bag System: in Section 8B”.
installation of steering wheel. If steering 3) Remove steering wheel from steering column
wheel has been installed without these referring to “Steering Wheel Removal and
conditions, contact coil will break when Installation: ”.
steering wheel is turned. 4) Remove steering column lower cover (2) and upper
cover (1).
2) Install steering wheel to steering shaft with 2 grooves
(1) on contact coil fitted in 2 lugs (2) in the back of
steering wheel and also aligning marks (3) on
steering wheel and steering shaft.
3) Tighten steering shaft nut (4) to specified torque.
Tightening torque
Steering shaft nut (a): 33 N·m (3.3 kg-m, 24.0 lb-
ft)
 Steering Wheel and Column: 6B-4

1 1

2 2
I4RS0A620008- I4RS0A620011-

5) Remove contact coil cable assembly (1) from 4) Install steering wheel to steering column. Refer to
steering column. “Steering Wheel Removal and Installation: ”.
5) Connect battery negative (–) cable.
6) Enable air bag system referring to “Enabling Air Bag
System: in Section 8B”.

Centering Contact Coil Cable Assembly

S4RS0A6206003
1) Check that vehicle’s wheels (front tires) are set at
straight-ahead position.
2) Check that ignition switch is at LOCK position.
1 3) Turn contact coil counterclockwise slowly with a light
I4RS0A620009- force till contact coil will not turn any further.

Installation NOTE:
1) Check to make sure that vehicle’s front tires are set Contact coil can turn about 5 turns at the
at straight-ahead position and then ignition switch is maximum, that is, if it is at the center
at LOCK position. position, can turn about two and a half turns
both clockwise and counterclockwise.
2) Install contact coil cable assembly (1) to steering
column securely.

NOTE:
New contact coil cable assembly is supplied
with contact coil set and held at its center
position with a lock pin (1). Remove this lock
pin after installing contact coil cable
assembly to steering column.

I4RS0A620012-

I4RS0A620010-

3) Install steering column upper cover (1) and lower

cover (2).
6B-5 Steering Wheel and Column:

4) From the position where contact coil became unable NOTE:

to turn any further (it stopped), turn it back clockwise When servicing steering column or any
about two and a half rotations and align center mark column-mounted component, remove
with alignment mark (1). steering wheel. But when removing steering
column simply to gain access to instrument
panel components, leave steering wheel
installed on steering column.

Removal

WARNING:
Never rest a steering column assembly on
the steering wheel with the air bag (inflator)
module face down and column vertical.
1 Otherwise, personal injury may result.
I4RS0A620013-

1) Disconnect negative (–) battery cable at battery

Contact Coil Cable Assembly Inspection terminal.
S4RS0A6206004
Check contact coil cable assembly wire harness for any 2) Disable air bag system. Refer to “Disabling Air Bag
signs of scorching, melting or other damage. System: in Section 8B”.
If it is damaged, replace. 3) Remove steering wheel and contact coil cable
assembly referring to “Steering Wheel Removal and
Installation: ” and “Contact Coil Cable Assembly
Removal and Installation: ”.
4) Detach lighting switch and wiper switch from steering
column.
5) Remove immobilizer control module (if equipped)
from steering column.
6) Remove ignition switch cylinder assembly (1) as
follows.
I4RS0A620014-
a) Turn ignition switch key to ACC position.
Steering Column Removal and Installation b) Insert 2 mm (0.078 in.) rod (2) through hole (3)
S4RS0A6206005 and push ignition switch cylinder lock.
CAUTION:
Once the steering column is removed from
the vehicle, the column is extremely
susceptible to damage.
• Dropping the column assembly on its end
could collapse the steering shaft or loosen
the plastic shear pins which maintain
column length.
• Leaning on the column assembly could
cause it to bend or deform. I4RS0A620015-

Any of the damage could impair the column’s 7) Detach ignition switch assembly from steering
collapsible design. column.
Steering column mounting nuts should not 8) Remove steering column hole cover.
be loosened with steering shaft joint upper 9) Remove steering joint cover.
side bolt tightened as this could cause
damage to shaft joint bearing. 10) Make alignment marks (4) on lower shaft (1) and
shaft joint of steering column (2) and lower shaft (1)
and pinion shaft (3) for a guide during reinstallation.
11) Remove lower shaft joint bolts (5).
12) Remove steering lower shaft (1).
 Steering Wheel and Column: 6B-6

3) Align flat part “A” of steering lower shaft (1) with bolt
hole “B” of shaft joint (2) of column as shown. Then
insert lower shaft into shaft joint of steering column
with matching marks (4).
4) Insert lower shaft (1) into pinion shaft (3) with
matching marks (4).
5) Tighten joint bolt (pinion shaft side) (6) to specified
torque first and then joint bolt (steering column side)
(5) to specified torque.

CAUTION:
I4RS0A620016- After tightening column nuts, tighten steering
13) Remove steering column mounting nuts (1). shaft upper joint bolt. Otherwise shaft joint
bearing is damaged.

Tightening torque
1 Steering shaft joint bolt (a): 25 N·m (2.5 kg-m,
18.5 lb-ft)

I4RS0A620017-

14) Remove steering column from vehicle.

Installation

CAUTION: I4RS0A620019-

After tightening steering column mounting 6) Install steering joint cover.

nuts, shaft joint bolts should be tightened. 7) Install ignition switch assembly to steering column.
Wrong tightening order could cause a 8) Install ignition switch cylinder assembly as follows.
damage to shaft joint.
a) Turn ignition key of ignition switch cylinder
assembly to ACC position.
1) Be sure that front wheels are in straight.
b) In this state, push ignition switch cylinder
2) Install steering column assembly to lower and upper
assembly into steering column till it clicks.
brackets. Tighten steering column lower nuts (1) first
and then upper nuts (2) to specifications as given 9) Install immobilizer control module (if equipped) from
below. steering column.
10) Install lighting switch, wiper switch to steering
Tightening torque
column.
Steering column nut (a): 14 N·m (1.4 kg-m, 10.5
lb-ft) 11) Install contact coil cable assembly and steering
wheel referring to “Contact Coil Cable Assembly
Removal and Installation: ” and “Steering Wheel
Removal and Installation: ”.
2,(a)
12) Install steering column hole cover.
13) Connect negative (–) battery cable.
14) Enable air bag system referring to “Enabling Air Bag
2,(a)
System: in Section 8B”.

1,(a)

1,(a)
I4RS0A620018-
6B-7 Steering Wheel and Column:

Steering Column Inspection Installation

S4RS0A6206006
Check steering column for damage and operation 1) Be sure that front wheels are in straight forward
referring to “Checking Steering Column for Accident state.
Damage: ”. 2) Align flat part “A” of steering lower shaft (1) with bolt
hole “B” of shaft joint (2) of column as shown. Then
Steering Lower Shaft Removal and Installation insert lower shaft into shaft joint of steering column
S4RS0A6206008 with matching marks (4).
CAUTION: 3) Insert lower shaft (1) into pinion shaft (3) with
matching marks (4).
Never turn steering wheel while steering
4) Tighten joint bolt (pinion shaft side) (6) to specified
lower shaft is removed.
torque first and then joint bolt (steering column side)
Should it have been turned and contact coil
(5) to specified torque.
have got out of its centered position, it needs
to be centered again. Also, turning steering Tightening torque
wheel more than about two and a half turns Steering shaft joint bolt (a): 25 N·m (2.5 kg-m,
will break contact coil. 18.5 lb-ft)

Removal
1) Turn steering wheel so that vehicle’s front tires are at
straight-ahead position.
2) Turn ignition switch to LOCK position and remove
key.
3) Remove steering joint cover.
4) Make alignment marks (4) on lower shaft (1) and
shaft joint of steering column (2) and lower shaft (1)
and pinion shaft (3) for a guide during reinstallation.
5) Remove lower shaft joint bolts (5).
I4RS0A620021-
6) Remove steering lower shaft (1).

I4RS0A620020-
 Steering Wheel and Column: 6B-8

Specifications
Tightening Torque Specifications
S4RS0A6207001
Tightening torque
Fastening part Note
N⋅m kg-m lb-ft
Steering shaft nut 33 3.3 24.0 )
Steering column nut 14 1.4 10.5 )
Steering shaft joint bolt 25 2.5 18.5 )

NOTE:
The specified tightening torque is also described in the following.
“Steering Wheel and Column Construction: ”

Reference:
For the tightening torque of fastener not specified in this section, refer to “Fasteners Information: in Section 0A”.

Special Tools and Equipment

Special Tool
S4RS0A6208002
09944–36011
Steering wheel remover
)
6C-1 Power Assisted Steering System:

Power Assisted Steering System

Precautions
Steering System Note • Take a note of DTC indicated on the SUZUKI scan
S4RS0A6300001 tool.
NOTE:
• Before inspection, be sure to read “Precautions for
All steering gear fasteners are important Electrical Circuit Service: in Section 00” and
attaching parts in that they could affect the understand what is written there.
performance of vital parts and systems, and/
• DTC C1122 (engine speed signal failure) is indicated
or could result in major repair expense. They
when ignition switch is at ON position and engine is
must be replaced with one of the same part
not running, but it means there is nothing abnormal if
number or with an equivalent part if
indication changes to a normal one when engine is
replacement becomes necessary. Do not use
started.
a replacement part of lesser quality or
substitute design. Torque values must be • As DTC is stored in memory of the P/S control
used as specified during reassembly to module, be sure to clear memory after repair by
assure proper retention of these parts. performing the procedure described in “DTC
Clearance: ”.

Precautions in Diagnosing Troubles

S4RS0A6300002

General Description
P/S System Description
S4RS0A6301001
This power steering (P/S) system consists of a P/S control module (3), a torque sensor (4), a motor (5). In this system,
the P/S control module determines the level and direction of the assist force for the steering wheel (1) according to the
signals from the torque sensor and the vehicle speed sensor (VSS) (8). The P/S control module runs the motor so as
to assist the operation of the steering wheel.
The P/S control module diagnoses troubles which may occur in the area including the following components when the
ignition switch is ON and the engine is running. When the P/S control module detects any malfunction, it stops the
motor operation.
• Torque sensor
• Vehicle speed sensor (VSS) circuit
• Engine speed signal circuit
• Motor
• P/S control module.
 Power Assisted Steering System: 6C-2

3
2
7 9

4
6
8

I4RS0A630001-

2. Steering column 6. Steering gear case assembly 7. Battery 9. ECM

EPS Diagnosis General Description

S4RS0A6301003
The P/S system in this vehicle is controlled by the P/S
control module. The P/S control module has an on-board
diagnostic system which detects a malfunction in this
system. When diagnosing troubles, be sure to have full
understanding of the outline of “On-Board Diagnostic
System Description: ” and each item in “Precautions in
Diagnosing Troubles: ”, and then execute diagnosis
according to “EPS System Check: ”.
I4RS0A630002-

On-Board Diagnostic System Description

S4RS0A6301004 Driving Cycle
The P/S control module performs the on-board diagnosis A “Driving Cycle” consists of engine startup and engine
(self-diagnosis) on the system and operates the “EPS” shutoff.
warning lamp (1) as follows.
• The “EPS” warning lamp lights when the ignition 3 Driving Cycles Detection Logic
switch is turned to ON position (but the engine at stop) The malfunction detected in the first and second driving
regardless of the condition of the P/S control system. cycle is stored in P/S control module memory (in the
This is only to check if the “EPS” warning lamp is form of pending DTC) but the “EPS” warning lamp does
operated properly. not light at these time. It lights up at the third detection of
• If the areas monitored by the P/S control module is same malfunction also in the next driving cycle.
free from any trouble after the engine start (while
engine is running), the “EPS” warning lamp turns OFF.
• When the P/S control module detects a trouble which
has occurred in the monitored areas the “EPS”
warning lamp flashes ON and OFF while the engine is
running to warn the driver of such occurrence of the
trouble and at the same time it stores the exact
trouble area in memory inside of the P/S control
module.
6C-3 Power Assisted Steering System:

Schematic and Routing Diagram

EPS System Wiring Circuit Diagram
S4RS0A6302001

11

BLK E49-2 12V

3
4
BLK GRN E49-1 E51-1 BLK
M 12
E51-2 RED
2

4 4
GRN LT GRN/BLK E52-1
1 4
4

RED/BLK
13 14
7
8
E52-18 WHT
G28-31 G28-25 GRY E52-5

10 E52-6 BLU

[E]
12V
5 12V
PPL E52-8 GRN
5V

15
PPL E52-4 5V
[F]
E52-20 RED
12V
5
PPL 6
E52-9 BRN

5V

RED/BLU E52-14 E52-16 YEL

5V

E52-19 GRY
BRN E52-12

9
12V

PPL/WHT E52-11

16

[A] [B] [C] [D]

11 12 13 14 15 16 17 18 19 20
1 1
1 2 3 4 5 6 7 8 9 10 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
2 2 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17

I4RS0B630002-
 Power Assisted Steering System: 6C-4

[A]: Connector “E52” (viewed from harness side) 3. Junction block assembly 11. P/S control module
[B]: Connector “E49” (viewed from harness side) 4. Fuse 12. P/S motor
[C]: Connector “E51” (viewed from harness side) 5. VSS 13. Shield
[D]: Connector “G28” (viewed from harness side) 6. TCM 14. Torque sensor
[E]: For M/T vehicle model 7. Combination meter 15. Torque sensor amplifier
[F]: For A/T vehicle model 8. “EPS” warning lamp 16. To ECM, BCM, Air bag SDM and ABS hydraulic unit/control
module assembly
1. Main fuse 9. Date link connector (DLC)
2. Ignition switch 10. ECM

Diagnostic Information and Procedures

EPS System Check
S4RS0A6304006
WARNING:
Carry out test drive in light traffic area to prevent an accident.

Step Action Yes No

1 1) Record details of the problem. For your record, use of a Go to Step 2. Go to Step 3.
questionnaire form will facilitate collecting information for
proper analysis and diagnosis.
2) Check if the problem described in “Customer
questionnaire” actually occurs in the vehicle.
(This step should be performed with the customer if
possible.)
3) Check for operation of the “EPS” warning lamp referring
to ““EPS” Warning Lamp Check: ”.
4) Check for DTC referring to “DTC Check: ”, and then
record DTC(s).
5) Clear DTC if any DTC exists referring to “DTC
Clearance: ”, and then recheck for DTC.

Is any DTC still detected?

2 1) Inspect and repair referring to applicable “DTC Table: ”. Go to Step 3. Go to Step 4.
2) Clear DTC referring to “DTC Clearance: ”.

Does the trouble recur?

3 1) Test drive the vehicle and turn the steering wheel fully to Go to Step 5. Go to Step 4.
the right and left at the stop vehicle. Check if any trouble
exists. See WARNING.
2) Inspect and repair basic parts referring to “Steering
Symptom Diagnosis: in Section 6A”.
3) If the trouble cannot be repaired in Step 3-2), inspect
and repair referring to “P/S System Symptom Diagnosis:
”.

Does the trouble recur?

4 1) Confirm if the problem is solved and the P/S system is Go to Step 5. END.
free from any abnormal conditions. If what has been
repaired is related to the DTC, clear the DTC once and
perform the test drive in Step 3-1), and then confirm that
no DTC is indicated.

Is any malfunction DTC detected?

5 1) Check for DTC referring to “DTC Check: ”. Go to Step 2. Go to Step 3.

Is any DTC detected?

6C-5 Power Assisted Steering System:

NOTE:
• As execution of “DTC Clearance: ” will clear all DTCs, be sure to record all DTCs before service.
• DTC C1122 is indicated when ignition switch is at ON position and engine is not running, it means
that nothing is abnormal.
• Current DTC and history DTC can be identified by condition of the “EPS” warning lamp.
“EPS” warning lamp operates as follows.

Only history DTC is set.

Current DTC is set.
(Faulty condition occurred once Current and history DTC
(Abnormality exists at
in the past, but normal condition exist.
present.)
is detected at present.)
“EPS” warning lamp
Remains ON. Turns OFF. Remains ON.
after engine started

Customer questionnaire (Example)

I3RM0A630005-

“EPS” Warning Lamp Check

S4RS0A6304007
1) Turn ignition switch to ON position (but without 1

running engine) and check if the “EPS” warning lamp

(1) lights up. If the lamp dose not light up, go to
““EPS” Warning Lamp Does Not Come ON at
Ignition Switch ON but Engine Stop: ” of the
diagnostic flows.
2) Start engine and check if the “EPS” warning lamp
turns OFF. If the lamp comes OFF, the P/S system is
I4RS0A630004-
in good condition.
 Power Assisted Steering System: 6C-6

DTC Check DTC Clearance

S4RS0A6304008 S4RS0A6304009
1) Turn ignition switch to OFF position. 1) Turn ignition switch to OFF position.
2) Connect SUZUKI scan tool to data link connector 2) Connect SUZUKI scan tool to data link connector
(DLC) (1) located on underside of instrument panel (DLC) (1) located on underside of instrument panel
at driver’s seat side. at driver’s seat side.
Special tool Special tool
(A): SUZUKI scan tool (A): SUZUKI scan tool

(A) (A)

1 1
I4RS0A630005- I4RS0A630005-

3) Turn ignition switch to ON position. 3) Turn ignition switch to ON position.

4) Read DTC according to the instructions displayed on 4) Erase DTC according to the instructions displayed
SUZUKI scan tool. For further details, refer to on SUZUKI scan tool. For further details, refer to
operator’s manual for SUZUKI scan tool. operator’s manual for SUZUKI scan tool.
5) After completing the clearance, turn ignition switch to
NOTE:
OFF position and disconnect SUZUKI scan tool from
If communication between SUZUKI scan tool DLC.
and the vehicle can not be established,
perform “Serial Data Link Circuit Check: ”.

5) After completing the check, turn ignition switch to

OFF position and disconnect SUZUKI scan tool from
DLC.

DTC Table
S4RS0A6304010
CAUTION:
Be sure to perform the “EPS System Check: ” before starting troubleshooting corresponding to each
DTC.

Detecting condition
DTC No. Detecting item MIL
(DTC will set when detecting)
No CODES Normal — —
Difference between voltages from torque
sensors at “E52-18” terminal and “E52-6”
Torque sensor main and sub circuit 1 driving
) C1113 terminal exceeds specified voltage
voltage difference high cycle
difference for P/S control module
diagnosis for specified period or longer
Voltage at “E52-20” terminal (5 V) differs
Torque sensor 5 V power supply circuit from specified voltage for P/S control 1 driving
) C1114
failure module diagnosis for specified period or cycle
longer
Voltage at “E52-16” terminal is lower than
) Torque sensor failure (signal voltage lower limit voltage for P/S control module 1 driving
C1117 high) diagnosis for specified period or longer cycle
after ignition SW is turned ON
6C-7 Power Assisted Steering System:

Detecting condition
DTC No. Detecting item MIL
(DTC will set when detecting)
Voltage at “E52-16” terminal is higher than
) 1 driving
Torque sensor failure (signal voltage low) upper limit voltage for P/S control module
C1118 cycle
diagnosis for specified period or longer
Voltage at “E52-8” terminal (12 V) is lower
Torque sensor 12 V power supply circuit than lower limit voltage for P/S control 1 driving
) C1119
failure module diagnosis for specified period or cycle
longer
No vehicle speed signal is inputted to P/S
control module in either one of the
following two conditions
1. More than 60 seconds pass at more
than 4000 rpm engine speed before a
VSS circuit signal not input (60 seconds 1 driving
) C1121 lapse of 5 minutes from the engine
or more) cycle
start
2. More than 60 seconds pass at more
than 2500 rpm engine speed after a
lapse of 5 minutes from the engine
start
P/S control module detects all the
following conditions for 20 seconds or
more 1 driving
) C1122 Engine speed signal circuit failure
• Vehicle speed signal 60 km/h (37 mph) cycle
or more
• Engine speed signal 220 rpm or less
No vehicle speed signal is inputted to P/S
control module in either one of the
following two conditions
1. More than 30 seconds pass at more
than 4000 rpm engine speed before a
VSS circuit signal not input (30 seconds 3 driving
) C1123 lapse of 5 minutes from the engine
or more) cycles
start
2. More than 30 seconds pass at more
than 2500 rpm engine speed after a
lapse of 5 minutes from the engine
start
Vehicle speed is inputted to P/S control
module as having decelerated by more
VSS circuit failure (abnormal 1 driving
) C1124 than specified deceleration and lower than
deceleration) cycle
5 km/h vehicle speed continued for 5
seconds after deceleration
Voltage at “E51-1” terminal or “E51-2”
terminal differs from specified voltage for 1 driving
) C1141 Motor circuit voltage abnormal
P/S control module diagnosis for specified cycle
period or longer
Measured value of motor circuit current is
Motor circuit current high command with 10 A or more higher than specified value 1 driving
) C1142
P/S control module target current of motor circuit current from P/S control cycle
module
Measured value of motor circuit current is 1 driving
) C1143 Motor circuit current excessive
50 A or more cycle
Measured value of motor circuit current is
Motor circuit current low command with 1 driving
) C1145 lower than specified value of motor circuit
P/S control module target current cycle
current from P/S control module
P/S control module power supply circuit Battery voltage is lower than lower limit 1 driving
) C1153
failure voltage for P/S control module diagnosis cycle
 Power Assisted Steering System: 6C-8

Detecting condition
DTC No. Detecting item MIL
(DTC will set when detecting)
Battery voltage is higher than upper limit
1 driving
) C1155 P/S control module failure voltage for P/S control module diagnosis
cycle
or internal failure of controller

Scan Tool Data ASSIST TORQUE

S4RS0A6304011 This parameter is an internal parameter of the EPS
Scan tool data Normal condition controller. It is obtained by computing the torque sensor
) input signal.
10 – 14 V
BATTERY VOLT
) MOTOR (CON)
7.5 – 10 V
TQS POWER SUPPL Based on the input signal, the EPS controller determines
) the assist amount and controls the current to the motor
1.5 – 2 V
MOTOR VOLT suitable for that assist amount. This parameter indicates
) that control value.
0 N⋅m
TQS MAIN TORQUE
) MOTOR (MON)
0 N⋅m
TQS SUB TORQUE This parameter indicates the actually measured value of
) the current flowing to the motor. The motor circuit
0 N⋅m
ASSIST TORQUE condition is diagnosed by comparing this parameter with
) “MOTOR (CON)” parameter described previously.
0A
MOTOR (CON)
) VEHICLE SPEED
0A
MOTOR (MON) The AC voltage signal produced by the vehicle speed
) sensor (VSS) is divided and adjusted by the
0 km/h
VEHICLE SPEED speedometer and thus the vehicle speed signal is
) obtained. The EPS controller determines the amount of
700 ± 50 rpm
ENGINE SPEED power assist based on this vehicle speed signal and the
) torque sensor signal.
ON
IGNITION SWITCH
ENGINE SPEED
Scan Tool Data Definitions Engine speed signal is fed from the ECM so that it can
be used for trouble diagnosis of the electric power
BATTERY VOLT steering system.
Battery voltage is an analog input signal read by the
ECU. IGNITION SWITCH
This parameter indicates the condition of the power
TQS (Torque sensor) POWER SUPPL supply through the ignition switch.
This parameter indicates the power supply voltage which
the EPS controller supplies to the torque sensor.

MOTOR VOLT
This parameter indicates the voltage between motor
terminals.

TQS (Torque sensor) MAIN TORQUE

The torque sensor is installed to detect the steering force
and the steering direction. It consists of two
potentiometers and the main torque sensor is one of
these.

TQS (Torque sensor) SUB TORQUE

The torque sensor is installed to detect the steering force
and the steering direction. It consists of two
potentiometers and the sub-torque sensor is one of
these. Its output characteristics are compared with those
of the main torque sensor.
6C-9 Power Assisted Steering System:

P/S System Symptom Diagnosis

S4RS0A6304001
This section describes trouble diagnosis of the P/S system parts whose trouble is not indicated by the on-board
diagnostic system (self-diagnostic function). When no malfunction is indicated by the on-board diagnostic system
(self-diagnosis function) and assuredly those steering basic parts as described in “Steering Symptom Diagnosis: in
Section 6A” are all in good condition, check the following power steering system parts which may be a possible cause
for each symptom of the steering.
Condition Possible cause Correction / Reference Item
Steering wheel feels Steering wheel installed improperly Install steering wheel correctly.
heavy (Perform “Steering (twisted)
Force Check: ” before Poor performance of torque sensor Check torque sensor referring to “Torque
diagnosis.) Sensor Inspection: ”.
Poor performance of motor Check motor referring to “Motor Assembly
Inspection: ”.
Steering gear case assembly faulty Replace.
Poor performance of VSS Check VSS referring to “DTC P0500: Vehicle
Speed Sensor (VSS) Malfunction: in Section
1A”.
Vehicle pulls to one side Poor performance of torque sensor Check torque sensor referring to “Torque
during straight driving Sensor Inspection: ”.
Poor recovery after turns Poor performance of torque sensor Check torque sensor referring to “Torque
Sensor Inspection: ”.
Steering column faulty Replace.

Serial Data Link Circuit Check

S4RS0A6304012
CAUTION:
Be sure to perform “EPS System Check: ” before starting “Troubleshooting”.

Wiring Diagram

8
3
4 E49-2 BLK
BLK GRN E49-1

4 [A] [B]
4 GRN LT GRN/BLK E52-1

1 4

4 11 12 13 14 15 16 17 18 19 20
1
1 2 3 4 5 6 7 8 9 10
2
RED/BLK

5
6
G28-31 G28-25 GRY E52-5
[C]

7
12V
16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
PPL/WHT E52-11 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17

I4RS0B630003-

[A]: Connector “E52” (viewed from harness side) 2. Ignition switch 6. “EPS” warning lamp
[B]: Connector “E49” (viewed from harness side) 3. Junction block assembly 7. Date link connector (DLC)
[C]: Connector “G28” (viewed from harness side) 4. Fuse 8. P/S control module
1. Main fuse 5. Combination meter 9. To ECM, BCM, Air bag SDM and ABS hydraulic unit/control
module assembly
 Power Assisted Steering System: 6C-10

Troubleshooting
Step Action Yes No
1 Was “EPS System Check” performed? Go to Step 2. Go to “EPS System
Check: ”.
2 1) Make sure that SUZUKI scan tool is free from Go to Step 3. Connect SUZUKI scan
malfunction and that correct program card (software) for tool to DLC properly.
P/S system is used.
2) Turn ignition switch to OFF position.
3) Check proper connection of SUZUKI scan tool to DLC.

Is connection in good condition?

3 1) Check if communication is possible by making Go to Step 4. Repair open in common
communication with other controllers (ECM, ABS section of serial data
hydraulic unit/control module assembly (if equipped) or circuit (“PPL/WHT” wire
SDM) or other vehicles. circuit) used by all
controllers or short to
Is it possible to communicate with the other controllers? ground or power circuit
which has occurred
somewhere in serial
data circuit (“PPL/WHT”
wire circuit).
4 Substitute a known-
1) With ignition switch at OFF position, disconnect “E52” Repair “PPL/WHT” wire
connector from P/S control module. good P/S control circuit for P/S system.
2) Check proper connection at “E52-11” (“PPL/WHT” wire) module and recheck.
terminal (2) for serial data circuit.
3) If OK, then check for high resistance, open or short to
power circuit or ground in “PPL/WHT” wire circuit for P/S
system.

E52
1
11

I4RS0B630004-

Is check result in good condition?

6C-11 Power Assisted Steering System:

“EPS” Warning Lamp Does Not Come ON at Ignition Switch ON but Engine Stop
S4RS0A6304013
Wiring Diagram

[A] [B]
BLK E49-2

3 11 12 13 14 15 16 17 18 19 20
1
4 1 2 3 4 5 6 7 8 9 10
BLK GRN E49-1
2

4 4
GRN LT GRN/BLK E52-1

1 4 [C]

4
RED/BLK

5 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17
6
G28-31 G28-25 GRY E52-5

I4RS0B630005-

[A]: Connector “E52” (viewed from harness side) 2. Ignition switch 6. “EPS” warning lamp
[B]: Connector “E49” (viewed from harness side) 3. Junction block assembly 7. P/S control module
[C]: Connector “G28” (viewed from harness side) 4. Fuse
1. Main fuse 5. Combination meter

Circuit Description
Operation (ON/OFF) of “EPS” warning lamp is controlled by P/S control module through combination meter.
If the P/S system is in good condition, P/S control module turns “EPS” warning lamp ON at the ignition switch ON, and
then turns it OFF at the engine start. If an abnormality in the system is detected, “EPS” warning lamp is turned ON
continuously by P/S control module. If P/S control module is disconnected, “EPS” warning lamp is not turned ON.

Troubleshooting
Step Action Yes No
1 1) Turn ignition switch ON. Go to Step 2. “GRN”, “RED/BLK” wire
circuit or ciruit fuse for
Do the other warning lamps come on? combination meter open
or short to ground.
2 1) Turn ignition switch OFF. Reinstall fuse, and then Check “GRN” wire
2) Remove and inspect the circuit fuse for P/S control go to Step 3. circuit for short to
module. ground.
If OK, replace fuse.
Is fuse in good condition?
3 1) With ignition switch OFF, disconnect P/S control module “BLK” wire circuit open. Go to Step 4.
connector (“E49”).
2) Check for proper connection to the P/S control module at
“E49-2” terminal.
3) Measure resistance between “E49-2” (“BLK” wire)
terminal and body ground.

Is it infinite (∞)?
 Power Assisted Steering System: 6C-12

Step Action Yes No

4 1) Check for proper connection to P/S control module at Go to Step 5. “BLK” or “GRN” wire
“E49-1” terminal. circuit open or short to
2) If OK, check for voltage between “E49-1” (“GRN” wire) ground.
terminal and body ground with ignition switch ON.

Is it 10 – 14 V?
5 1) Check for proper connection to the P/S control module at Go to Step 6. “LT GRN/BLK” wire
“E52-1” terminal. circuit open or short to
2) If OK, check voltage between “E52-1” (“LT GRN/BLK” ground.
wire) terminal and body ground with ignition switch ON.

Is it 10 – 14 V?
6 1) Remove combination meter and disconnect combination Go to Step 7. “RED/BLK” wire circuit
meter connector (“G28”) with ignition switch turned OFF. open or short to ground.
2) Check for proper connection to the combination meter at
“G28-31” terminal.
3) If OK, check voltage between “G28-31” (“RED/BLK”
wire) terminal and body ground with ignition switch ON.

Is it 10 – 14 V?
7 1) Check for proper connection to the combination meter at “GRY” wire circuit open. Connect combination
“G28-25” terminal and P/S control module at “E52-5” meter connector (“G28”)
terminal. with ignition switch
2) Measure resistance between the combination meter at turned OFF.
“G28-25” terminal and the P/S control module at “E52-5” Go to Step 8.
terminal.

Is it infinite (∞)?
8 1) Check for voltage between “E52-5” (“GRY” wire) Replace the P/S control Replace the
terminal and body ground with ignition switch ON. module. combination meter.

Is it 10 – 14 V?
6C-13 Power Assisted Steering System:

“EPS” Warning Lamp Come ON Steady and Engine Start

S4RS0A6304014
Wiring Diagram

[A] [B]
BLK E49-2

3 11 12 13 14 15 16 17 18 19 20
1
4 1 2 3 4 5 6 7 8 9 10
BLK GRN E49-1
2

4 4
GRN LT GRN/BLK E52-1

1 4 [C]

4
RED/BLK

5 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17
6
G28-31 G28-25 GRY E52-5

I4RS0B630005-

[A]: Connector “E52” (viewed from harness side) 2. Ignition switch 6. “EPS” warning lamp
[B]: Connector “E49” (viewed from harness side) 3. Junction block assembly 7. P/S control module
[C]: Connector “G28” (viewed from harness side) 4. Fuse
1. Main fuse 5. Combination meter

Circuit Description
Operation (ON/OFF) of “EPS” warning lamp is controlled by P/S control module through combination meter.
If the P/S system is in good condition, P/S control module turns “EPS” warning lamp ON at the ignition switch ON, and
then turns it OFF at the engine start. If an abnormality in the system is detected, “EPS” warning lamp is turned ON
continuously by P/S control module. If P/S control module is disconnected, “EPS” warning lamp is not turned ON.

Troubleshooting
Step Action Yes No
1 1) Perform DTC check. Go to Step 5 of “EPS Go to Step 2.
System Check: ”.
Is there any DTC (NO CODES on SUZUKI scan tool)?
2 1) With ignition switch OFF, disconnect P/S control module Connect P/S control Replace the P/S control
connector (“E52”). module connector module.
2) Check for proper connection to the P/S control module at (“E52”) with ignition
“E52-5” terminal. switch turned OFF.
3) If OK then ignition switch ON. Go to Step 3.

Does EPS warning lamp turn on?

3 1) Remove combination meter and disconnect combination Replace the “GRY” wire circuit short
meter connector (“G28”). combination meter. to ground.
2) Check for proper connection to combination meter at
“G28-25” terminal.
3) If OK then ignition switch ON.

Does EPS warning lamp turn on?

 Power Assisted Steering System: 6C-14

DTC C1113 / C1117 /C1118: Torque Sensor Circuit Failure

S4RS0A6304015
DTC C1113: Torque Sensor Main and Sub Circuit Voltage Difference High
DTC C1117: Torque Sensor Failure (Signal Voltage High)
DTC C1118: Torque Sensor Failure (Signal Voltage Low)

Wiring Diagram

5
6
BLK E49-2
E52-18 WHT

E52-6 BLU
3 12V
4
BLK GRN E49-1 E52-8 GRN
5V
7
E52-20 RED
2

4 4 E52-9 BRN
GRN LT GRN/BLK E52-1

1 E52-16 YEL
4
E52-19 GRY

[A] [B]

11 12 13 14 15 16 17 18 19 20 1
1 2 3 4 5 6 7 8 9 10
2

I4RS0B630006-

[A]: Connector “E52” (viewed from harness side) 2. Ignition switch 5. P/S control module
[B]: Connector “E49” (viewed from harness side) 3. Junction block assembly 6. Torque sensor
1. Main fuse 4. Fuse 7. Torque sensor amplifier

DTC Detecting Condition and Trouble Area

DTC detecting condition Trouble area
DTC C1113: • Torque sensor
Difference between voltages from torque sensors at “E52- • P/S control module
18” terminal and “E52-6” terminal exceeds specified
voltage difference for P/S control module diagnosis for
specified period or longer
(1 driving cycle detection logic)
DTC C1117:
Voltage at “E52-16” terminal is lower than lower limit
voltage for P/S control module diagnosis for specified
period or longer after ignition SW is turned ON
(1 driving cycle detection logic)
DTC C1118:
Voltage at “E52-16” terminal is higher than upper limit
voltage for P/S control module diagnosis for specified
period or longer
(1 driving cycle detection logic)
6C-15 Power Assisted Steering System:

DTC Troubleshooting
Step Action Yes No
1 Was “EPS System Check” performed? Go to Step 2. Go to “EPS System
Check: ”.
2 Is DTC C1114 and/or DTC C1119 indicated, too? Go to “DTC C1114: Go to Step 3.
Torque Sensor 5 V
Power Supply Circuit
Failure: ” and/or “DTC
C1119: Torque Sensor
12 V Power Supply
Circuit Failure: ”.
3 1) Check P/S control module connector (“E52”) for proper Go to Step 4. Repair “WHT”, “BLU”
connection. and/or “YEL” wire circuit
2) If OK, then check for high resistance, open or short to for P/S control module
power circuit or ground in “WHT”, “BLU” and “YEL” wire to torque sensor.
circuit for P/S control module to torque sensor.

Is check result in good condition?

4 1) Check torque sensor and its circuit referring to “Torque Substitute the original P/ Replace the steering
Sensor Inspection: ”. S control module with a gear case assembly,
known-good P/S control and then recheck.
Is torque sensor in good condition? module, and then
recheck.

DTC C1114: Torque Sensor 5 V Power Supply Circuit Failure

S4RS0A6304016
Wiring Diagram

5
6
BLK E49-2
E52-18 WHT

E52-6 BLU
3 12V
4
BLK GRN E49-1 E52-8 GRN
5V
7
E52-20 RED
2

4 4 E52-9 BRN
GRN LT GRN/BLK E52-1

1 E52-16 YEL
4
E52-19 GRY

[A] [B]

11 12 13 14 15 16 17 18 19 20 1
1 2 3 4 5 6 7 8 9 10
2

I4RS0B630006-

[A]: Connector “E52” (viewed from harness side) 2. Ignition switch 5. P/S control module
[B]: Connector “E49” (viewed from harness side) 3. Junction block assembly 6. Torque sensor
1. Main fuse 4. Fuse 7. Torque sensor amplifier
 Power Assisted Steering System: 6C-16

DTC Detecting Condition and Trouble Area

DTC detecting condition Trouble area
Voltage at “E52-20” terminal (5 V) differs from specified • High resistance, open or short in torque sensor circuit
voltage for P/S control module diagnosis for specified • Torque sensor
period or longer
• P/S control module
(1 driving cycle detection logic)

DTC Troubleshooting
Step Action Yes No
1 Was “EPS System Check” performed? Go to Step 2. Go to “EPS System
Check: ”.
2 Is DTC C1153 and/or DTC C1155 indicated, too? Go to “DTC C1153: P/S Go to Step 3.
Control Module Power
Supply Circuit Failure: ”
and/or “DTC C1155: P/S
Control Module Failure:
”.
3 1) Remove console box. Go to Step 4. Repair high resistance,
2) Check P/S control module connector (“E52”) for proper open or short to power
connection. circuit or ground in 5 V
power supply (“RED”
3) If OK, turn ignition switch ON.
wire) circuit.
4) Check for voltage between “E52-20” (“RED” wire)
terminal and body ground with connector (“E52”)
connected to the P/S control module (1).

E52

20

I4RS0A630013-

Is it about 5 V?
4 1) Check torque sensor and its circuit referring to “Torque Check P/S control Replace the steering
Sensor Inspection: ”. module power and gear case assembly,
ground circuit. If OK, and then recheck.
Is torque sensor in good condition? substitute the original P/
S control module with a
known-good P/S control
module, and then
recheck.
6C-17 Power Assisted Steering System:

DTC C1119: Torque Sensor 12 V Power Supply Circuit Failure

S4RS0A6304020
Wiring Diagram

5
6
BLK E49-2
E52-18 WHT

E52-6 BLU
3 12V
4
BLK GRN E49-1 E52-8 GRN
5V
7
E52-20 RED
2

4 4 E52-9 BRN
GRN LT GRN/BLK E52-1

1 E52-16 YEL
4
E52-19 GRY

[A] [B]

11 12 13 14 15 16 17 18 19 20 1
1 2 3 4 5 6 7 8 9 10
2

I4RS0B630006-

[A]: Connector “E52” (viewed from harness side) 2. Ignition switch 5. P/S control module
[B]: Connector “E49” (viewed from harness side) 3. Junction block assembly 6. Torque sensor
1. Main fuse 4. Fuse 7. Torque sensor amplifier

DTC Detecting Condition and Trouble Area

DTC detecting condition Trouble area
Voltage at “E52-8” terminal (12 V) is lower than lower limit • High resistance, open or short in torque sensor circuit
voltage for P/S control module diagnosis for specified • Torque sensor
period or longer
• P/S control module
(1 driving cycle detection logic)

DTC Troubleshooting
Step Action Yes No
1 Was “EPS System Check” performed? Go to Step 2. Go to “EPS System
Check: ”.
2 Is DTC C1153, too? Go to “DTC C1153: P/S Go to Step 3.
Control Module Power
Supply Circuit Failure: ”.
 Power Assisted Steering System: 6C-18

Step Action Yes No

3 1) Remove console box. Go to Step 4. Repair high resistance,
2) Check P/S control module connector (“E52”) for proper open or short to power
connection. circuit or ground in 12 V
power supply (“GRN”
3) If OK, turn ignition switch ON.
wire) circuit.
4) Check for voltage between “E52-8” (“GRN” wire)
terminal and body ground with connector (“E52”)
connected to the P/S control module.

E52

I4RS0A630021-

Is it about 12 V?
4 1) Check torque sensor and its circuit referring to “Torque Substitute the original P/ Replace the steering
Sensor Inspection: ”. S control module with a gear case assembly,
known-good P/S control and then recheck.
Is torque sensor in good condition? module, and then
recheck.
6C-19 Power Assisted Steering System:

DTC C1121 / C1123 / C1124: VSS Circuit Failure

S4RS0A6304017
DTC C1121: VSS Circuit Signal Not Input (60 Seconds or More)
DTC C1123: VSS Circuit Signal Not Input (30 Seconds or More)
DTC C1124: VSS Circuit Failure (Abnormal Deceleration)

Wiring Diagram

BLK E49-2 [A] [B]

3
11 12 13 14 15 16 17 18 19 20
4 1
BLK GRN E49-1 1 2 3 4 5 6 7 8 9 10
2

4 4 [C]
GRN LT GRN/BLK E52-1

1 4

4
RED/BLK
16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
5 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17

6
G28-31 G28-25 GRY E52-5

5V
12V

PPL E52-4
7

I4RS0B630007-

[A]: Connector “E52” (viewed from harness side) 2. Ignition switch 6. “EPS” warning lamp
[B]: Connector “E49” (viewed from harness side) 3. Junction block assembly 7. VSS
[C]: Connector “G28” (viewed from harness side) 4. Fuse 8. P/S control module
1. Main fuse 5. Combination meter
 Power Assisted Steering System: 6C-20

DTC Detecting Condition and Trouble Area

DTC detecting condition Trouble area
DTC C1121: • High resistance, open or short in VSS circuit
No vehicle speed signal is inputted to P/S control module • VSS
in either one of the following two conditions
• ECM
(1 driving cycle detection logic)
• P/S control module
1. More than 60 seconds pass at more than 4000 rpm
engine speed before a lapse of 5 minutes from the
engine start
2. More than 60 seconds pass at more than 2500 rpm
engine speed after a lapse of 5 minutes from the
engine start
DTC C1123:
No vehicle speed signal is inputted to P/S control module
in either one of the following two conditions
(3 driving cycle detection logic)
1. More than 30 seconds pass at more than 4000 rpm
engine speed before a lapse of 5 minutes from the
engine start
2. More than 30 seconds pass at more than 2500 rpm
engine speed after a lapse of 5 minutes from the
engine start
DTC C1124:
Vehicle speed is inputted to P/S control module as having
decelerated by more than specified deceleration and
lower than 5 km/h vehicle speed continued for 5 seconds
after deceleration
(1 driving cycle detection logic)

DTC Troubleshooting
Step Action Yes No
1 Was “EPS System Check” performed? Go to Step 2. Go to “EPS System
Check: ”.
2 DTC Check for ECM referring to “DTC Check: in Section Go to “DTC P0500: Go to Step 3.
1A”. Vehicle Speed Sensor
(VSS) Malfunction: in
Is DTC P0500 detected? Section 1A”.
3 1) Check for proper connection to the P/S control module Check P/S control Repair “PPL” wire
and ECM at each “PPL” wire terminal (P/S control module power and circuit.
module side: “E52-4” terminal, ECM side: Refer to “ECM ground circuit. If OK,
Input / Output Circuit diagram” under “Electronic Control substitute the original P/
System Description: in Section 1A”). S control module with a
2) If they are OK, check for high resistance, open or short known-good P/S control
to power circuit or ground in “BRN” wire circuit. module, and then
recheck.
Is check result in good condition?
6C-21 Power Assisted Steering System:

DTC C1122: Engine Speed Signal Circuit Failure

S4RS0A6304018
Wiring Diagram

6
3
4
BLK GRN E49-1 E49-2 BLK

4 4
GRN LT GRN/BLK E52-1 [A] [B]
1

4
5V
11 12 13 14 15 16 17 18 19 20
1
1 2 3 4 5 6 7 8 9 10
RED/BLU E52-14
2
5
5V

BRN E52-12

I4RS0B630008-

[A]: Connector “E52” (viewed from harness side) 2. Ignition switch 5. ECM
[B]: Connector “E49” (viewed from harness side) 3. Junction block assembly 6. P/S control module
1. Main fuse 4. Fuse

DTC Detecting Condition and Trouble Area

DTC detecting condition Trouble area
P/S control module detects all the following conditions for • High resistance, open or short in engine speed circuit
20 seconds or more • ECM
(1 driving cycle detection logic)
• P/S control module
• Vehicle speed signal 60 km/h (37 rpm) or more
• Engine speed signal 220 rpm or more

DTC Troubleshooting
Step Action Yes No
1 Was “EPS System Check” performed? Go to Step 2. Go to “EPS System
Check: ”.
2 1) Clear DTC(s) referring to “DTC Clearance: ”. Go to Step 3. Check intermittent
2) Turn the ignition switch to OFF position. trouble referring to
“Intermittent and Poor
3) Check if any DTC is detected referring to “DTC Check: ”.
Connection Inspection:
Is DTC C1122 still detected? in Section 00”.
3 DTC Check for ECM referring to “DTC Check: in Section Go to “DTC P0340: Go to Step 3.
1A”. Camshaft Position
(CMP) Sensor Circuit:
Is DTC P0340 detected? in Section 1A”.
4 1) Check for proper connection to the P/S control module Check P/S control Repair “BRN” wire
and ECM at each “BRN” wire terminal (P/S control module power and circuit.
module side: “E52-12” terminal, ECM side: Refer to ground circuit. If OK,
“ECM Input / Output Circuit diagram” under “Electronic substitute the original P/
Control System Description: in Section 1A”. S control module with a
2) If they are OK, check for high resistance, open or short known-good P/S control
to power circuit or ground in “BRN” wire circuit. module, and then
recheck.
Is check result in good condition?
 Power Assisted Steering System: 6C-22

DTC C1141 / C1142 / C1143 / C1145: Motor Circuit Failure

S4RS0A6304019
DTC C1141: Motor Circuit Voltage Abnormal
DTC C1142: Motor Circuit Current High Command with P/S Control Module Target Current
DTC C1143: Motor Circuit Current Excessive
DTC C1145: Motor Circuit Current Low Command with P/S Control Module Target Current

Wiring Diagram

3 5
4 12V
BLK GRN E49-1

6
2
E51-1 BLK
4 4
GRN LT GRN/BLK E52-1 M
E51-2 RED
1

BLK E49-2

[A] [B] [C]

11 12 13 14 15 16 17 18 19 20 1 1
1 2 3 4 5 6 7 8 9 10
2 2

I4RS0B630009-

[A]: Connector “E52” (viewed from harness side) 1. Main fuse 4. Fuse
[B]: Connector “E49” (viewed from harness side) 2. Ignition switch 5. P/S control module
[C]: Connector “E51” (viewed from harness side) 3. Junction block assembly 6. P/S motor

DTC Detecting Condition and Trouble Area

DTC detecting condition Trouble area
DTC C1141: • High resistance, open or short in P/S motor circuit
Voltage at “E51-1” terminal or “E51-2” terminal differs from • P/S motor
specified voltage for P/S control module diagnosis for
• P/S control module
specified period or longer
(1 driving cycle detection logic)
DTC C1142:
Measured value of motor circuit current is 10 A or more
higher than specified value of motor circuit current from P/
S control module
(1 driving cycle detection logic)
DTC C1143:
Measured value of motor circuit current is 50 A or more
(1 driving cycle detection logic)
DTC C1145:
Measured value of motor circuit current is lower than
specified value of motor circuit current from P/S control
module
(1 driving cycle detection logic)
6C-23 Power Assisted Steering System:

DTC Troubleshooting
Step Action Yes No
1 Was “EPS System Check” performed? Go to Step 2.
Go to “EPS System
Check: ”.
2 Is DTC C1153 and/or DTC C1155 indicated, too? Go to “DTC C1153: P/S Go to Step 3.
Control Module Power
Supply Circuit Failure: ”
and/or “DTC C1155: P/S
Control Module Failure:
”.
3 1) Remove console box. Go to Step 4. Repair poor connection,
2) Check P/S control module connector (“E51”) for proper high resistance, open or
connection. short to power circuit or
ground in “E51-1”
3) If OK, start engine.
(“BLK” wire) or “E51-2”
4) Check for voltage between “E51-1” (“BLK” wire) terminal (“RED” wire) circuit and
and body ground and “E51-2” (“RED” wire) terminal and recheck.
body ground with connector (“E51”) connected to the P/
S control module.

E51

I4RS0A630019-

Are they 5 – 7 V with steering wheel at straight position?

4 1) Check motor and its circuit referring to “Motor Assembly Substitute the original P/ Replace the steering
Inspection: ”. S control module with a gear case assembly,
known-good P/S control and then recheck.
Is motor in good condition? module, and then
recheck.

DTC C1153: P/S Control Module Power Supply Circuit Failure

S4RS0A6304021
Wiring Diagram

5
3
4
BLK GRN E49-1

[A] [B]

4 4
GRN LT GRN/BLK E52-1 11 12 13 14 15 16 17 18 19 20
1
1 1 2 3 4 5 6 7 8 9 10

4 2

BLK E49-2

I4RS0B630010-

[A]: Connector “E52” (viewed from harness side) 2. Ignition switch 5. P/S control module
[B]: Connector “E49” (viewed from harness side) 3. Junction block assembly
1. Main fuse 4. Fuse
 Power Assisted Steering System: 6C-24

DTC Detecting Condition and Trouble Area

DTC detecting condition Trouble area
Battery voltage is lower than lower limit voltage for P/S • High resistance, open or short in P/S control module
control module diagnosis power supply circuit
(1 driving cycle detection logic) • Undercharged Battery
• P/S control module

DTC Troubleshooting
Step Action Yes No
1 Was “EPS System Check” performed? Go to Step 2. Go to “EPS System
Check: ”.
2 1) Check circuit fuse for P/S control module. Go to Step 3. Check charging system
2) If OK, measure voltage between positive battery terminal referring to “Generator
and vehicle body ground with engine running. Test (Undercharged
Battery Check): in
Is voltage 10 V or more? Section 1J”.
3 1) With ignition switch OFF, disconnect P/S control module Go to Step 4. Repair “BLK” wire
connector (“E49”). circuit.
2) Check for proper connection to the P/S control module at
“E49-2” (“BLK” wire) terminal.
3) If OK, then check for high resistance, open or short to
power circuit in “BLK” wire circuit.

Is check result in good condition?

4 1) Remove steering column hole cover with turn ignition Check for intermittent Repair poor connection
switch OFF. trouble referring to or high resistance in
2) Check for proper connection to the P/S control module at “Intermittent and Poor “E49-1” (“GRN” wire)
“E49-1” (“GRN” wire) terminal. Connection Inspection: circuit.
in Section 00”.
3) Connect P/S control module connector.
If OK, substitute the
4) If OK, check voltage between “E49-1” terminal and body
original P/S control
ground with engine running.
module with a known-
E49
good P/S control
module, and then
recheck.
1

I4RS0A630023-

Is voltage 10 V or more?
6C-25 Power Assisted Steering System:

DTC C1155: P/S Control Module Failure

S4RS0A6304022
Wiring Diagram

5
3
4
BLK GRN E49-1

[A] [B]

4 4
GRN LT GRN/BLK E52-1 11 12 13 14 15 16 17 18 19 20
1
1 1 2 3 4 5 6 7 8 9 10

4 2

BLK E49-2

I4RS0B630010-

[A]: Connector “E52” (viewed from harness side) 2. Ignition switch 5. P/S control module
[B]: Connector “E49” (viewed from harness side) 3. Junction block assembly
1. Main fuse 4. Fuse

DTC Detecting Condition and Trouble Area

DTC detecting condition Trouble area
Battery voltage is higher than upper limit voltage for P/S • Overcharged Battery
control module diagnosis or internal failure of controller • P/S control module
(1 driving cycle detection logic)

DTC Troubleshooting
Step Action Yes No
1 Was “EPS System Check” performed? Go to Step 2. Go to “EPS System
Check: ”.
2 Measure voltage between positive battery terminal and Substitute the original P/ Check charging system
vehicle body ground with engine running. S control module with a referring to “Generator
known-good P/S control Test (Overcharged
Is voltage 15.5 V or less? module, and then Battery Check): in
recheck. Section 1J”.

Inspection of P/S Control Module and Its

Circuits 1
S4RS0A6304023 2
The P/S control module (1) and its circuits can be
checked at the P/S control module wiring couplers (2) by
measuring voltage and resistance.

CAUTION:
P/S control module cannot be checked by
itself. It is strictly prohibited to connect
voltmeter or ohmmeter to the P/S control
module with connectors disconnected from
the P/S control module.

I4RS0A630008-
 Power Assisted Steering System: 6C-26

Voltage Check
1) Remove console box.
2) Check for voltage at each terminal with connectors connected to the P/S control module.

NOTE:
As each terminal voltage is affected by the battery voltage, confirm if the battery voltage is 11 V or
more when ignition switch is ON.

[B]

[C]

[A]

11 12 13 14 15 16 17 18 19 20

1 2 3 4 5 6 7 8 9 10

I4RS0A630024-

[A]: Connector “E52” (viewed from harness side)

[B]: Connector “E51” (viewed from harness side)
[C]: Connector “E49” (viewed from harness side)

Terminal Wire color Circuit Normal voltage Condition

P/S control module power
E49-1 GRN 10 – 14 V —
supply from battery
E49-2 BLK Ground — —
Engine idling and steering wheel at
E51-1 BLK Motor output 1 5–7V
straight position
Engine idling and steering wheel at
E51-2 RED Motor output 2 5–7V
straight position
P/S control module power
E52-1 LT GRN/BLK 10 – 14 V Ignition switch ON
supply from ignition switch
E52-2 — — — —
E52-3 — — — —
*Indicator deflection • Ignition switch ON
E52-4 PPL VSS repeated 0 – 1 V • Front left tire turned quickly with right
and 10 – 14 V tire locked
E52-5 GRY “EPS” Light 0V “EPS” warning lamp ON
6C-27 Power Assisted Steering System:

Terminal Wire color Circuit Normal voltage Condition

• Ignition switch ON and steering
wheel at straight position
E52-6 BLU Torque sensor (Sub) About 2.5 V
• Check voltage between “E52-6” and
“E52-9” terminals
E52-7 — — — —
• Ignition switch ON
12 V power supply for torque
E52-8 GRN About 12 V • Check voltage between “E52-8” and
sensor
“E52-9” terminals
E52-9 BRN Torque sensor (GND) 0V —
E52-10 — — — —
E52-11 PPL/WHT Data link connector — —
*Indicator deflection
E52-12 BRN Engine speed signal repeated 0 – 1 V Engine idling
and 6 – 10 V
E52-13 — — — —
• Ignition switch ON
E52-14 RED/BLU P/S signal About 5 V • Engine idling and turning steering
wheel to the right or left as far as it
stops
E52-15 — — — —
E52-16 YEL Torque sensor failure signal 0V —
E52-17 — — — —
• Ignition switch ON and steering
wheel at straight position
E52-18 WHT Torque sensor (Main) About 2.5 V
• Check voltage between “E52-18”
and “E52-9” terminals
E52-19 GRY Shield (GND) — —
• Ignition switch ON
5 V power supply for torque
E52-20 RED About 5 V • Check voltage between “E52-20”
sensor
and “E52-9” terminals

NOTE:
*: The voltage of this circuit may not be checked by voltmeter. If so, use oscilloscope.
 Power Assisted Steering System: 6C-28

Steering Wheel Play Check Steering Force Check

S4RS0A6304002 S4RS0A6304003
• Check steering wheel for looseness or rattle by 1) Place vehicle on level road and set steering wheel at
moving it in its shaft direction and lateral direction. straight-ahead position.
If found defective, repair or replace. 2) Check if tire inflation pressure is as specified
• Check steering wheel for play, holding vehicle in referring to the tire placard.
straight forward condition on the ground with engine 3) Remove driver air bag (inflator) module referring to
stopped. “Driver Air Bag (Inflator) Module Removal and
If steering wheel play is not within specification, Installation: in Section 8B”.
inspect as follows and replace if found defective.
4) Start engine.
• Tie-rod end ball stud for wear (Ball stud should move
5) With engine idling, measure steering force by turning
when more than 0.2 N⋅m (2 kg-cm, 0.44 lb-ft) torque is
torque wrench.
applied.)
• Lower ball joint for wear Steering force
Less than 6.4 N⋅m (0.64 kg-m, 4.6 lb-ft)
• Steering shaft joint for wear
• Steering pinion or rack gear for wear or breakage
• Each part for looseness
Steering wheel play
“a”: 0 – 30 mm (0 – 1.18 in.)

I3RM0A630022-

6) Install driver air bag (inflator) module referring to

“Driver Air Bag (Inflator) Module Removal and
Installation: in Section 8B”.

I3RM0A630021-
6C-29 Power Assisted Steering System:

Repair Instructions
Steering Gear Case Assembly Components
S4RS0A6306020

7 (b)

4 11
6

5
9 (b)
3 (a) 17 (f)

15 12 (d)

10 (c)
2 16 (e)

14

19 (g)
13

19 (g)

18

3 (a)

2 4

7 (b)
8

9 (b)
I4RS0A630025-

1. Steering gear case 10. Steering gear case mounting No.1 bolt 19. Heat insulator bolt
2. Tie-rod lock washer 11. Steering gear case grommet : 93 N⋅m (9.3 kg-m, 67.5 lb-ft)
3. Tie-rod 12. Steering gear case mounting No.3 bolt : 45 N⋅m (4.5 kg-m, 32.5 lb-ft)
4. Band 13. Steering gear case mounting bracket : 55 N⋅m (5.5 kg-m, 40.0 lb-ft)
5. Boot 14. Steering rack plunger : 40 N⋅m (4.0 kg-m, 29.0 lb-ft)
: Apply grease 99000-25010 to rack plunger.
6. Rack boot clip 15. Steering rack plunger spring : Refer to “Steering Rack Plunger
: Apply grease 99000-25010 to spring end. Removal and Installation: ”.
7. Tie-rod end lock nut 16. Steering rack damper screw : 64 N⋅m (6.4 kg-m, 46.5 lb-ft)
: Apply thread lock 99000-32110 to all around thread part of rack
damper screw.
8. Tie-rod end 17. Steering rack damper lock nut : 9.5 N⋅m (0.95 kg-m, 7.0 lb-ft)
9. Tie-rod end lock nut 18. Heat insulator : Do not reuse.
 Power Assisted Steering System: 6C-30

Tie-Rod End Boot On-Vehicle Inspection

S4RS0A6306008
Inspect each boot for tear. If evan a small tear is noted,
replace it with a new one.

I4RS0A630041-

Installation
1) Install tie-rod end lock nut (1) and tie-rod end (2) to
I3RM0A630024-
tie-rod (3). Align lock nut with mark (4) on tie-rod
thread.
Tie-Rod End Removal and Installation
S4RS0A6306009

Removal
1) Hoist vehicle, and then remove wheel referring to
“Wheel Removal and Installation: in Section 2D”.
2) Remove tie-rod end nut (1) from steering knuckle.

I4RS0A630042-

2) Connect tie-rod end to knuckle. Tighten tie-rod end

nut (1) to specified torque.
Tightening torque
Tie-rod end nut (a): 45 N·m (4.5 kg-m, 32.5 lb-ft)

I3RM0A630025-

3) Disconnect tie-rod end (1) from knuckle (2) using

puller (3).

I3RM0A630029-

3) Inspect for proper toe referring to “Front Wheel

2 3 Alignment Inspection and Adjustment: in Section
2B”.

I4RS0A630040-

4) For ease of adjustment after installation, make

marking (1) of tie-rod end lock nut (2) position on tie-
rod end thread. Then, loosen lock nut and remove
tie-rod end (3) from tie-rod (4).
6C-31 Power Assisted Steering System:

4) After confirming proper toe, tighten tie-rod end lock Steering Gear Case Assembly Removal and
nut to specified torque. Installation
S4RS0A6306013
Tightening torque
Tie-rod end lock nut (a): 45 N·m (4.5 kg-m, 32.5 Removal
lb-ft)
CAUTION:
Be sure to set front wheels (tires) in straight
direction and remove ignition key from key
cylinder before performing the following
steps; otherwise, contact coil of air bag
system may get damaged.

1) Remove steering joint cover.

2) Make alignment marks (1) on pinion shaft (2) and
joint of steering lower shaft (3) for a guide during
I3RM0A630030- reinstallation.
5) Tighten wheel bolts to specified torque and lower 3) Loosen joint bolt (steering column side) (4) and
hoist. remove joint bolt (pinion shaft side) (5) and
Tightening torque disconnect steering lower shaft (3) from pinion shaft
Wheel bolt: 85 N·m (8.5 kg-m, 61.5 lb-ft) (2).

Tie-Rod End Inspection

S4RS0A6306010
• Inspect for play in ball joint.
3
4
• Inspect for play in rack end ball joint.
In either case, if found defective, replace. 5
3
5

1
2

I4RS0B630013-
I4RS0A630043-
4) Hoist vehicle and remove both wheels referring to
“Wheel Removal and Installation: in Section 2D”.
Steering Shaft Joint On-Vehicle Inspection 5) Remove tie-rod nuts (1) from both steering knuckles.
S4RS0A6306012
Check shaft joint for wear, breakage and any other
damage and replace if any defect exists.

I3RM0A630025-

6) Disconnect both tie-rod ends (1) from knuckles (2),

using puler (3).
I4RS0A630026-
 Power Assisted Steering System: 6C-32

1
4,(b)
2 3 3,(a)
I4RS0A630030-

2) Install front suspension frame with steering gear

I4RS0A630040- case assembly referring to “Front Suspension
7) To remove the steering gear case assembly easily, Frame, Stabilizer Bar and/or Bushings Removal and
lower the engine with transmission, but don’t Installation: in Section 2B”.
remove. 3) Install engine rear mounting bolt (1).
8) Support engine with transaxle by supporting device Tightening torque
and then remove engine rear mounting bolt (1). Engine rear mounting bracket bolt (a): 55 N·m (
5.5 kg-m, 40 lb-ft)

1
3

I4RS0A630028- 1,(a)
3
9) Remove front suspension frame with steering gear I4RS0A630031-
case assembly referring to “Front Suspension 4) Remove supporting device.
Frame, Stabilizer Bar and/or Bushings Removal and
Installation: in Section 2B”. 5) Install tie-rod ends to knuckles (right & left). Tighten
each tie-rod end nut (1) to specified torque.
10) Remove steering gear case mounting No.1 bolts (1),
No.3 bolts (2) and gear case bracket, then remove Tightening torque
gear case (3) from front suspension frame (4). Tie-rod end nut (a): 45 N·m (4.5 kg-m, 32.5 lb-ft)

3
2

1
I4RS0A630029-

I3RM0A630029-
Installation
6) Be sure that steering wheel and brake discs (right &
1) Mount steering gear case (1) to front suspension left) are all straight-ahead position and then insert
frame (2) and tighten gear case mounting No.1 bolts steering lower shaft (5) into steering pinion shaft (3)
(3) and No.3 bolts (4) to specified torque. with matching marks (4).
Tightening torque
Steering gear case mounting No.1 bolt (a): 55
N·m (5.5 kg-m, 40.0 lb-ft)
Steering gear case mounting No.3 bolt (b): 40
N·m (4.0 kg-m, 29.0 lb-ft)
6C-33 Power Assisted Steering System:

7) Tighten steering shaft joint lower bolt (1) and upper Steering Rack Boot Inspection
bolt (2) to specified torque (Lower side first and then S4RS0A6306014

upper side). Hoist vehicle.

Inspect each boot for tear. A torn boot allows entry of
Tightening torque dust and water which can cause wear to steering rack
Steering shaft joint bolt (a): 25 N·m (2.5 kg-m, and pinion to produce noise as well as rust to result in
18.5 lb-ft) malfunction of steering system.
If even a small tear is noted, replace with new one.
Also, check each boot for dent. If there is a dent, keep
boot in most compressed state for some seconds to
5 correct dent.
2, (a) Boots should be visually inspected for any damage, dent
1, (a)
and tear during every periodical inspection at specified
5 intervals and whenever vehicle is hoisted for any other
purpose.
4
1, (a)
3

I4RS0B630016-

8) Install both wheels and tighten wheel bolts to

specified torque.
Tightening torque
Wheel bolt: 85 N·m (8.5 kg-m, 61.5 lb-ft)
9) Lower hoist. I4RS0A630034-

10) Check toe setting. Adjust as required refer to “Front

Wheel Alignment Inspection and Adjustment: in Tie-Rod / Rack Boot Removal and Installation
S4RS0A6306015
Section 2B”.
11) Tighten both tie-rod end lock nuts to specified Removal
torque. 1) Remove steering gear case assembly referring to
Tightening torque “Steering Gear Case Assembly Removal and
Tie-rod end lock nut (a): 45 N·m (4.5 kg-m, 32.5 Installation: ”.
lb-ft) 2) For ease of adjustment after installation, make
marking (1) of tie-rod end lock nut position of tie-rod
thread.

I4RS0A630044-

I3RM0A630030-
3) Loosen tie-rod end lock nut and remove tie-rod end.
4) Remove boot band (2) and clip (1).
5) Remove boot from tie-rod.

IYSQ01630034-

6) Unbend bent part of tie-rod (1).

 Power Assisted Steering System: 6C-34

7) Hold rack with soft jawed vise (3) and remove tie-rod
from rack (2).

I3RM0A630050-

5) Fasten boot with new band and clip securely.

Special tool
(A): 09943–55010

I3RM0A630051-
I4RS0A630033-
6) Install tie-rod end lock nut and tie-rod end to tie-rod.
Installation Position lock nut to marking (1) made in removal.
1) Install tie-rod (1) to rack (2). NOTE:
2) Hold rack with soft jawed vise and tighten tie-rod to
When tie-rod was replaced, measure length
specified torque.
“a” on removed tie-rod and use it on new
Tightening torque replacement tie-rod so as to position lock nut
Tie-rod (a): 93 N·m (9.3 kg-m, 67.5 lb-ft) properly.

I3RM0A630048-

3) Bend lock washer at 2 places (1) as shown in figure. I3RM0A630052-

7) Install steering gear case assembly referring to

“Steering Gear Case Assembly Removal and
Installation: ”.

I4RS0A630035-

4) Apply sealant to gear case groove “A” indicated in

the figure. Position boot properly in grooves of gear
case (or rack side mount) and tie-rod.
After this, check to ensure that boot is free from twist
and dent.
“A”: Sealant 99000–31120
6C-35 Power Assisted Steering System:

Steering Rack Plunger Removal and Installation Special tool

S4RS0A6306030 (A): 09944–18310
Removal Tightening torque
1) Remove gear case assembly referring to “Steering Rotation torquer of pinion (a): 2.0 N·m (0.2 kg-
Gear Case Assembly Removal and Installation: ”. m, 1.5 lb-ft)
2) Loosen lock nut (1) with holding damper screw (2).
3) Remove lock nut (1), rack damper screw (2), rack
plunger spring (3) and rack plunger (4).

I3RM0A630055-

5) After adjustment, tighten lock nut to specified torque

with holding damper screw at the position.
I4RS0A630045-

Tightening torque
Installation Rack damper screw lock nut (a): 64 N·m (6.4 kg-
1) Apply grease lightly to sliding part of plunger (1) m, 46.5 lb-ft)
against rack. Install gear case assembly referring to “Steering
2) Install plunger and spring (2) as shown. Gear Case Assembly Removal and Installation: ”.
3) Apply thread lock cement to rack damper screw (3)
and tighten them as follows. Steering Rack Plunger Inspection
S4RS0A6306031
a) Tighten damper screw to 25 N⋅m (2.5 kg-m, 18.0
lb-ft). • Inspect rack plunger (1) for wear or damage.
b) Loosen damper screw until 180°. • Inspect rack plunger spring (2) for deterioration.
c) Retighten damper screw to 3.9 N⋅m (0.39 kg-m,
3.0 lb-ft).
d) After tightening rack damper screw to specified
torque, turn it back by 10° or less.
“A”: Grease 99000–25050
“B”: Thread lock cement 99000–32110
Tightening torque
Rack damper screw (a): Tighten 25 N⋅m (2.5
kg-m, 18.0 lb-ft) and loosen 180° and then I4RS0A630047-

tighten 3.9 N⋅m (0.39 kg-m, 3.0 lb-ft) and turn

it back by 10° or less by the specified P/S Control Module Removal and Installation
S4RS0A6306027
procedure.
Removal
1) Disconnect negative cable at battery.
2) Remove console box.
3) Disconnect connectors (1) from P/S control module.
4) Remove P/S control module (2) from floor panel.

Installation
Reverse removal procedure for installation noting the
following.
I4RS0A630046- • Tighten P/S control module screw to the specified
4) Pinion rotation torque should be checked with rack torque.
position centered.
Tightening torque
Also, check if rack as a whole moves smoothly.
P/S control module mounting bolt (a): 9 N·m (0.9
kg-m, 6.5 lb-ft)
 Power Assisted Steering System: 6C-36

Motor Assembly Inspection

(a) S4RS0A6306029
1) Remove console box.
2) Disconnect motor connector (“E51”) from P/S control
module with ignition switch OFF.
3) Check for resistance between terminals of motor
connector (“E51”).
1
If check result is not as specified, replace steering
gear case assembly.
Motor circuit resistance
“E51-1” and “E51-2” (For
About 1 Ω
motor)

4) Check for continuity between terminal of motor

connector (“E51”) and body ground.
If check result is not as specified, replace steering
gear case assembly.
2
I4RS0A630036- Motor circuit resistance
“E51-2” and body ground No continuity
Torque Sensor Inspection
S4RS0A6306028
1) Remove console box. E51

2) Turn ignition switch to ON position.

3) Check for voltage between terminals of connector 1
(“E52”) with connecting it to P/S control module and
not running engine. If check result is not satisfactory, 2
replace steering gear case assembly.
Torque sensor specification
Steering Steering Steering
wheel fully wheel held wheel fully I4RS0A630038-
turned right at position turned left 5) Connect battery (1) between “E51-1” and “E51-2”.
for run Check if motor rotates smoothly, and then measure
straight current between “E51-1” and “E51-2” using ammeter
Main (2) as shown in the figure. If check result is not
sensor satisfactory, replace steering gear case assembly.
Approx 5.0 V Approx 2.5 V Approx 0.4 V
(“E52-18” –
“E52-9”) Motor circuit current (reference value)
Sub Standard: About 0.65 A
sensor
Approx 5.0 V Approx 2.5 V Approx 0.4 V E51
(“E52-6” –
“E52-9”)
1 1

E52
2

18
6 9
I4RS0A630039-

I4RS0A630037-

1. Connector “E52” (viewed from harness side)

6C-37 Power Assisted Steering System:

Specifications
Tightening Torque Specifications
S4RS0A6307001
Tightening torque
Fastening part Note
N⋅m kg-m lb-ft
Tie-rod end nut 45 4.5 32.5 )/)
Tie-rod end lock nut 45 4.5 32.5 )/)
Wheel bolt 85 8.5 61.5 )/)
Steering gear case mounting No.1 bolt 55 5.5 40.0 )
Steering gear case mounting No.3 bolt 40 4.0 29.0 )
Engine rear mounting bracket bolt 55 5.5 40 )
Steering shaft joint bolt 25 2.5 18.5 )
Tie-rod 93 9.3 67.5 )
Rack damper screw Tighten 25 N⋅m (2.5 kg-m, 18.0 lb-ft) and )
loosen 180° and then tighten 3.9 N⋅m (0.39
kg-m, 3.0 lb-ft) and turn it back by 10° or
less by the specified procedure.
Rotation torquer of pinion 2.0 0.2 1.5 )
Rack damper screw lock nut 64 6.4 46.5 )
P/S control module mounting bolt 9 0.9 6.5 )

NOTE:
The specified tightening torque is also described in the following.
“Steering Gear Case Assembly Components: ”

Reference:
For the tightening torque of fastener not specified in this section, refer to “Fasteners Information: in Section 0A”.
 Power Assisted Steering System: 6C-38

Special Tools and Equipment

Recommended Service Material
S4RS0A6308001
Material SUZUKI recommended product or Specification Note
Grease SUZUKI Super Grease E P/No.: 99000–25050 )
Sealant Silicone Sealant P/No.: 99000–31120 )
Thread lock cement Thread Lock Cement Super 1322 P/No.: 99000–32110 )

NOTE:
Required service material is also described in the following.
“Steering Gear Case Assembly Components: ”

Special Tool
S4RS0A6308002
09943–55010 09944–18310
Boot clamp plier Pinion torque checking
socket
) )

SUZUKI scan tool

—
This kit includes following
items. 1. Tech 2, 2. PCMCIA
card, 3. DLC cable, 4. SAE
16/19 adapter, 5. Cigarette
cable, 6. DLC loopback
adapter, 7. Battery power
cable, 8. RS232 cable, 9.
RS232 adapter, 10. RS232
loop back connector, 11.
Storage case, 12. Power
supply ) / )
6C-39 Power Assisted Steering System: