.

35B-1

ANTI-LOCK -
BRAKING
SYSTEM (A
cFWD> I

CONTENTS 35209000114

ABS-ECU* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 ON-VEHICLE SERVICE . . . . . . . . . . . . . . . . . . . 26

Bleeding.................................... 26
BRAKE PEDAL . . . . . . . . Refer to GROUP 35A
Brake Booster Operating Test
. . . . . . . . . . . . . . . . . . . . . . . . . . Refer to GROUP 35A
FRONT DISC BRAKE
........................ Refer to GROUP 35A Brake Drum Inside Diameter Check . . . . . . . . . . 27
Brake Fluid Level Sensor Check
GENERAL INFORMATION ................. .3 . . . . . . . . . . . . . . . . . . . . . . ..a. Refer to GROUP 35A
Brake Lining and Brake Drum Contact Check
HYDRAULIC UNIT........................ 37 . . . . . . . . . . ..*............................... 27

LUBRICANTS .............................. 5
Brake Lining Thickness Check . . . . . . . . . . . . . . . 26
Brake Pedal Check and Adjustment
MASTER CYLINDER AND BRAKE BOOSTER . . . . . . . . . . . . . . . . . . . . . . . . . . Refer to GROUP 35A
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
CONTINUED ON NEXT PAGE
Master Cylinder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

WARNINGS REGARDING SERVICING OF SUPPLEMENTAL RESTRAINT SYSTEM (SRS) EQUIPPED VEHICLES I

WARNING!
(1) Improper service or maintenance of any component of the SRS, or any SRS-related component, can lead to personal
injury or death to service personnel (from inadvertent firing of the air bag) orto the driver and passenger (from renderin I
the SRS inoperative).
(2) Service or maintenance of any SRS component or SRS-related component must be performed only at an authorized
MITSUBISHI dealer.
(3) MITSUBISHI dealer personnel must throughly review this manual, and especially its GROUP 52B - Supplemental
Restraint System (SRS) and GROUP 00 - Maintenance Service before beginning any service or maintenance of any
component of the SRS or any SRS-related component.
NOTE
The SRS includes the following components: SRS-ECU, SRS warning light, air bag module, clock spring and interconnecting wiring.
Other SRS-related components (that may have to be removed/installed in connection with SRS service or maintenance) are
indicated in the table of contents by an asterisk (*).
35B-2

.*
Check Valve Operation Check Solenoid Valve Check . , . . . . . . . . . . . . . . . . . . . . . 30
. . . . . . . . . * . . . . . . . . . . . . . . . . Refer to GROUP 35A
Stop Light Switch Check
Discharged Battery . . . . . . . . . . . . . . . . . * . . . . . . . 31 . . . . . . . . . . . . . . . . . . . . . . . . . . Refer to GROUP 35A
Front Brake Disc Run-out Check Wheel Speed Sensor Output Voltage Check
..,.....,................, Refer to GROUP 35A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Front Brake Disc Run-out Correction
.*...*.................... Refer to GROUP 35A PROPORTIONING VALVE . . . . . . . . . . . . . . . . . 36
Front Brake Disc Thickness Check
. . . . . . . . . . . . . . . . . . . . . . . . . . Refer to GROUP 35A
REAR DRUM BRAKE .................... 33

Front Disc Brake Pad Check and Replacement

Wheel Cylinder ............................. 35
. . . . . . . . . . . . . . . . . . . . . . . . . . Refer to GROUP 35A
SEALANT.. . . . . . . . . . . . . Refer to GROUP 35A
Front Disc Brake Rotor Check
. . . . . . . . . . . . . . . . . . . . . . . . . . Refer to GROUP 35A SERVICE SPECIFICATIONS . . . . . . . . . . . . . . . . .4
Hydraulic . . . . . . . . . . . . . . . . . . . . . . . . 28
Unit Check
Motor Operation Check . . . . . . . . . . . . . . . . . . . . . . 30 SPECIAL TOOLS . . . . . . . . . . . . . . . . . . . . . . . . . .5
Motor Relay and Valve Relay Continuity Check
*..*,* *..*..*..* *............................ 30
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . .6
Proportioning Valve Function Test WHEEL SPEED SENSOR . . . . . . . . . . . . . . . . . 38
. . ..*...*...... . . . . . . . . . . . Refer to GROUP 35A
 .
ABS <FWD> - General Information 35B-3

GENERAL INFORMATION 35200010116

- . __._/

The ABS consists of components such as the wheel In addition, reading of diagnostic trouble codes
speed sensors, stop light switch, hydraulic unit and data list and actuator testing are possible by
assembly, ABS control unit (ABS-ECU) and the using the Scan Tool.
ABS warning light. If a problem occurs in the system,
the malfunctioning components can be identified
and the trouble symptoms will be memorized by
the diagnostic function.

Items Specifications

Master cylinder Type Tandem type (with level sensor)

I.D. mm (in.) 22.22 (87)

Brake booster Type Vacuum type, single

Effective dia. of power cylinder mm (in.) 230 (9.1)

Boosting ratio 5.0

Proportioning valve Type Dual type

Decompression ratio 0.25

Front brakes Type Floating caliper, 1-piston, ventilated disc

Disc effective dia. x thickness mm (in.) 184 x 18 (7.2 x .71)

Wheel cylinder I.D. mm (in.) . 54.0 (2.13)

Pad thickness mm (in.) 10.0 (39)

Clearance adjustment Automatic

Rear drum brakes Type Leading trailing

Drum I.D. mm (in.) 203 (8.0)

Wheel cylinder I.D. mm (in.) 17.46 (.687)

Lining thickness mm (in.) 4.38 (172)

Clearance adjustment Automatic

Brake fluid DOT-3 or DOT-4

ABS type 4-sensor, 4-channel method

Speed sensor Magnet coil type on 4-wheels

Front rotor teeth 43

Rear rotor teeth 43

35B-4 ABS <FWD> - General Information/Service Specifications

CONSTRUCTION DIAGRAM

1. ABS valve relay 6. Wheel speed sensor

2. ABS motor relay 7. ABS-ECU
3. ABS warning light 8. Data link connector
4. Stop light switch 9. Hydraulic unit
5. Rotor

SERVICE SPECIFICATIONS 352 00030129

Items Standard value Limit

Rear drum brake Lining thickness mm (in.) 4.38 (172) 1.0 (039)

Drum inside diameter mm (in.) 203 (8.0) 205 (8.1)

Resistance between solenoid valve terminals 52 IN 8.04 - 9.04

OUT 4.04 - 4.54

Wheel speed sensor’s internal resistance kQ 1.4 - 1.8

I-
Wheel speed sensor insulation resistance kQ 100 or more I-

Clearance between the rear speed sensor mounting surface and 0.1 - 2.0 (.004 - .079)
the rotor mm (in.)
 .

ABS cFWD> - Lubricants/Special Tools 35B-5

LUBRICANTS 35200050040

Items Specified lubricant

Brake fluid DOT-3 or DOT-4

Wheel cylinder body inner surfaces Repair kit grease

Rear brake shoe and backing plate contact surfaces Brake grease SAE J310, NLGI No. 1

Shoe assembly and auto adjuster assembly contact surfaces

Shoe and lever assembly and auto adjuster assembly contact surfaces

SPECIAL TOOLS 35200060128

Tool Tool number and name Supersession Application

MB991 502 MB991 496-OD For checking of ABS [diagnostic

Scan Tool (MUT-II) sub trouble code display when using
assembly the Scan Tool (MUT-II)]

502

MB991 529 Tool not necessary if Scan For checking of ABS (Diagnostic
Diagnostic trouble code Tool (MUT-II) is available. trouble code display when using
check harness the ABS warning light)

I3991529

MB991 008 Installation of drum brake wheel

Piston cup installer cylinder piston cup

MB991 223 MB991219 t For checking of wheel speed

Inspection harness set sensor output voltage
A: MB991219
Connector pin
contact pressure
inspection harness
358-6 ABS <FWD> - Troubleshootina

TROUBLESHOOTING 35201110136

DIAGNOSTIC TROUBLESHOOTING FLOW

Gather information from customer

’ *ms notreoccur
Check diagnostic trouble code Check diaanostic trouble code

No diagnostic
trouble code

Is the basic brake system functioning

u I Recheck trouble s!mptom

Refer to G35A - Trouble- No diagnostic

shooting trouble code
*
(Refer to P.35B-9)

1Diagnostic trouble

1 , code displayed

Inspection chart for trouble symptoms inspection chartfor diagnostictrouble

(Refer to P.35B-18) codes (Refer to P.3!5B-9)
.,. . _
NOTES WITH REGARD TO DIAGNOSIS
The condition listed in the following table are considered normal.

Condition Explanation of condition

System check sound When starting the engine, a thudding sound can sometimes be heard coming from inside
the engine compartment, but this is because the system operation check is being per-
formed. This is considered normal.

ABS operation sound 1. Sound of the motor inside the ABS hydraulic unit operation, (whine)
2. Sound is generated along with vibration of the brake pedal. (scraping)
3. When ABS operates, sound is generated from the vehicle chassis due to repeated
brake application and release.
(Thump: suspension; squeak: tires)

ABS operation For road surfaces such as snow-covered roads and gravel roads, the braking distance for
(Long braking distance) vehicles with ABS can sometimes be longer than that for other vehicles. Accordingly, ad-
vise the customer to drive safely on such roads by lowering the vehicle speed.

Diagnosis detection condition depends on the diagnostic trouble code.

When checking to see if the trouble symptom reoccurs after the diagnostic trouble code has been erased,
check the “Detection conditions” column in the inpsection chart for diagnostic trouble codes (refer to
P.358-8) and the description in the “Comments” column of the inspection procedure chart for diagnostic
trouble codes in order to carry out testing under driving conditions which satisfy each of the given conditions. s
 .
ABS <FWD> - Troubleshooting 35B-7

DIAGNOSTIC FUNCTION 35201120337

DIAGNOSTIC TROUBLE CODES CHECK

With the Scan Tool
Connect the scan tool to the data link connector then check
diagnostic trouble codes.
Caution
Turn the ignition switch off before connecting or discon-
necting the scan tool. .

With the ABS Warning Light

1. Use the special tool to ground No. 1 terminal of the data
link connector.
2. To check ABS system, remove the valve relay.
NOTE
That is because the valve relay is off and the warning
light remains illuminated if the ABS system is defective.
3. Turn off the ignition switch.
4. Read out a diagnostic trouble code by observing how
AOQM0052 the warning light flashes.

ABS Warning light/ A14M0090

1 When the diagnostic trouble code No.24 is output / When no diagnostic trouble code is output*

]-j-o.5 s
1.5s ‘- ---0.5s
lluminsted .
switched off llluminsted KO.,,
d _! _, :~03XOll3 Switched off-
t
Pause Tens Place Units A03X0114
time 3s signal division signal
2s

NOTE
*: Even if the ABS system is normal, removing the valve relay causes the diagnostic trouble code No.
51 to be output.
ERASING DIAGNOSTIC TROUBLE CODES
With the Scan Tool
Connect the scan tool to the data link connector (16-pin), then erase the diagnostic trouble codes.
Caution
Turn off the ignition switch before connecting or disconnecting the scan tool.
35B-8 ABS <FWD> - Troubleshooting

I Without the Scan Tool

1. Use the special tool to ground No.1 terminal of the data
link connector.

AOOM0052

2. Keep the vehicle from moving.

3. Turn the stop light switch “ON” (by depressing the brake
pedal).
4. Keeping the conditions made in steps 1 to 3, turn the
ignition switch “ON”. Within 3 seconds after this, turn
the stop light switch “OFF” (by releasing the brake pedal).
Then, turn the stop light switch “ON” and “OFF” ten times
successively.
NOTE
If the ABS-ECU functions have stopped due to the fail-sale
function, the diagnostic code cannot be erased.

Ignition switch

OFF ;
Stop light switch
ON ;
I,

ABS warning light

Diagnostic trouble code memory

Erasing completed
 ABS <FWD> - Troubleshooting 35B-9

INSPECTION CHART FOR DIAGNOSTIC TROUBLE CODES 35201130149

Inspect according to the inspection chart that is appropriate for the diagnostic trouble code.
Diagnostic Inspection item Diagnostic content Detection Reference page
trouble conditions
code no.
11 1Front right wheel speed sensor Open circuit or short A, B 35810
12 Front left wheel speed sensor circuit
13 Rear right wheel speed sensor II ~
14 Rear left wheel speed sensor
15 Wheel speed sensor Abnormal output signal B 35B-11
16 Power supply system A, B 35B-12
21 Front right wheel speed sensor B 35B-10
22 Front left wheel speed sensor
23 Rear right wheel speed sensor
Rear left wheel speed sensor
33 Stop light switch system A, B 358-l 3
41 Front right solenoid valve (inside) A, B 358-l 4
42 Front left solenoid valve (inside)
43 Rear right solenoid valve (inside)
44 Rear left solenoid valve (inside)
51 Valve relay A, B 358-l 5
53 Motor relay, motor B 358-l 6
63 ABS-ECU A, B 358-41
(Replace the
ABS-ECU)

Detection conditions
A: During system check immediately after starting
B: When driving
35B-10 ABS <FWD> - Troubleshooting

INSPECTION PROCEDURE FOR DIAGNOSTIC TROUBLE CODES

Code Nos. 11,12,13,14 Wheel speed sensor open circuit Probable cause
or short circuit
Code Nos.21,22,23,24 Wheel speed sensor
Code Nos.11, 12, 13, 14 are output when the ABS-ECU detects an open circurt or l Malfunctron of wheel speed sensor
short circurt In at least one of the four wheel-speed sensors. l Malfunction of wiring harness or connector
l Malfunction of ABS-ECU

Code Nos.21, 22, 23, 24 are output under the following cases: l Malfunction of wheel-speed sensor
l When an open circuit cannot be found, but more than one wheel-speed sensor l Malfunctron of rotor
does not output any signal during driving at 8 km/h (5 mph) or higher. l Malfunction of wheel bearing
l When a chipped or plugged-up rotor tooth, etc. is detected during driving at 40 l Malfunction of wiring harness or connector
km/h (25 mph) or more. l Malfunctron of ABS-ECU
I , I

~- NG
Wheelspeedsensor installationinspec- I_ Repair
tion.
OK
PNG
Measure at the ABS-ECU connector e Wheel speed sensor inspection (Refer Replace the wheel speed senser.
B-31. to P.358-39.)
l Drsconnect the connector and
OK
measure from the harness side.
1 NG
Resistance values between 8 - 21,
l
6-19,7-20and9-22
/ Check the following connectors: * Repair

OK: 1.4 - 1.8 kQ

/ B-31, B-48, B-53, E-10, A-09, A-38,
/ E-12, E-18

7 Check the harness wire between each

wheel speed sensor and ABS-ECU, and

Replace the wheel speed sensor,

B-31
OK

Check trouble symptoms.

NG

Replace the ABS-ECU.

 .
ABS <FWD> - Troubleshooting 35B-11

Code No. 15 Wheel speed sensor (Abnormal output 1 Probable cause

signal)
A wheel speed sensor outputs an abnormal signal (other than an open or short-circuit). l Improper rnstallatron of wheel speed sensor
l Malfunction of wheel speed sensor
l Malfunction of rotor
l Malfunction of wheel bearing
l Malfunction of wirrng harness or connector
l Malfunction of ABS-ECU

’Checktroub,esymptoms,
Install the four same size tires.
’ .
Wheel speed sensor rnstallationinspec- - Repair
tion.
IOK
1 NG
+ Wheel speed sensor inspection Replace the wheel speed sensor.
spection (Refer to P.358-27.) (Refer to P.35B-38.)
1OK 1OK

Rotor inspection (Refer to P.35B-40.)

Check the following connector:

(Refer to GROUP 26 - On-vehicle Ser- wheel speed sensor and ABS-ECU, and
vice.) (Referto GROUP 27 - On-vehicle
Check trouble symptoms.
1NG

Replace the ABS-l&U.

35B-12 ABS <FWD> - Troubleshooting

Code No. 16 Power supply system 1Probable cause

The voltage of the ABS-ECU power supply or the voltage of the valve relay power l Malfunction of wiring harness or connector.
supply drops lower or rises higher than the specified value. If the voltage returns l Malfunction of ABS-ECU
to the specified value, this code is no longer output.

Caution
If battery voltage drops or rises during inspection, this code will be output as well. If the voltage
returns to standard value, this code is no longer output.
Before carrying out the following inspection, check the battery level, and refill it if necessary.

l Disconnect the connector and

measure from the harness side.

switch and valve relay, and repair if nec-

essary.
j Valve relay check (Refer to P.35B-30.) [Replace the valve relay.
OK
NG NG
Measure at ABS-ECU connector B-30. -1 Check the following connectors. - Repair
l Disconnect the connector and 1B-30,
1
A-46
I
measure from the harness side.
OK
l Ignition switch: ON
Voltage between 42 - Body ground NG
l

OK: System voltage

1Check trouble symptoms. + Check the harness between valve relay
and ABS-ECU, and repair if necessary.

Check the harness between valve relay

and ABS-ECU, and repair if necessary.

measure from the harness side.

Check trouble symptoms. Replace the ABS-ECU.

OK

Check the following connector: Check trouble symptoms. Replace the ABS-ECU.
B-30
NG

Repair
 ABS <FWD> - Troubleshooting 35B-13

Code No. 33 Stop light switch system 1Probable cause

This code is output when the stop light switch is not be turned off (when the stop l Malfunction of stop light switch
light swatch stays on for 15 minutes or more although the ABS IS not operating). l Malfunction of harness or connector
l Malfunction of ABS-ECU

No NG
Does the stoo liaht illuminateand swrtch 1 5-IStop liqht switch installarton inspectron. / w Repair
off normally+ -
OK
Yes NG
Stop light switch inspeciton (Refer to -- Replace the stop light switch.
GROUP 35A - On-vehicle Service.)

NG
c- Repair

’ Check the harness between dedicated

fuse No. 11 and the ABS-ECU, and re-
pair if necessary.

l Drsconnect the connector and

l Voltage between 40 - Body ground

\ 1 NG
Check the following connector: w Repair
B-30
OK
1 NG
Check trouble symptom. , -1 Replace the ABS-ECU.
*m-eI*_“_I
35B-14 ABS <FWD> - Troubleshooting

Code Nos.41,42,43,44 Solenoid valve ) Probable cause

The ABS-ECU always monitors the solenoid valve drive circuit. It determmes that l Malfunction of wiring harness
there is an open or short-circuit in the solenoid coil or in a harness: l Malfunction of hydraulic unit
l When no current flows in the solenord even though the ABS-ECU turns on it, l Malfunction of ABS-ECU
and vice versa.
L / I

Solenoid valve check (Refer to Replace the hydraulic unit.

P.3.5B-30.)

Measure
I
at hydraulic
OK

unit connector
IUG
c -1 Check the following connectors: 1
NG
- Repair
A-40 and ABS-ECU connectors B-31 1 A-40, B-31, B-30 -
and B-30.
OK
l Disconnect the connector and 4
measure at the harness srde.
Check trouble symptoms.
l Contrnurty between the following
terminals NG
OK: Continuity
HU side 1 5 4 8 Check the harness between the hydrau-
IIC unit and ABS-ECU, and repair if nec-
I I I I
I essary.
ABS-ECU side 38 46 16 14

HU side 3 7 2 6
I I I I
ABS-ECU side 1 15 45 37

Check the following connectors: * Repair

A-39 and valve relay connector A-46.
l Disconnect the connector and

Check the harness between the hydrau-

 .
ABS <FWD> - Troubleshooting 356-15

Code No.51 Valve relay Probable cause

When the ignition switch is turned to ON, the ABS-ECU switches the valve relay l Malfunction of valve relay
off and on during the mitral check. In that way, the ABS-ECU compares the signals l Malfunction of wrnng harness or connector
sent to the valve relay with the voltage in the valve relay momtor line. That IS how l Malfunction of ABS-ECU
to check If the valve relay IS operating normally. The ABS-ECU always checks If l Malfunction of hydraulic unit
current flows in the valve relav monrtor line, too. It determines that there IS an open 1
circuit when no current flows.‘lf no current flows in the valve relay monitor line, this
diagnostic trouble code is output.

NOTE
Whenever reading the diagnostic trouble codes using the ABS warning light (referto P.35B-7), this diagnostic
trouble code will be output. That is not a malfunction but because the valve relay connector is disconnected.
After repairing all other malfunctions, connect the valve relay connector again to check the valve relay.
Then check that the ABS warning light does not illuminate. If it illuminates, the valve relay may be defective.
So carry out the following procedure.

Valve relay check (Refer to P.358-30.) Replace the valve relay.

NG NG
- Check the following connector: b
Disconnect the connector and A-46
OK
l Voltage between the following 1 NG
terminals: Check trouble symv * Check the harness between fusible link
(1) 4 - Body ground No.6 and repair if necessary.
(2) 3 - Body ground
NG pT NG
OK: System voltage - Check the following connectors:
A-46, B-48, B-63, B-67
IOK
,NG
1 Check trouble sym:toms. c Check the harness between rgition
I , switch and valve relay, and repair if nec-

Measure at ABS-ECU connector B-30. -

l Disconnect the connector and

Check the harness between valve relay

Voltage between 42 - Body ground
and ABS-ECU, and repair if necessary.

Measure at ABS-ECU connector B-30.

l Disconnect the connector and

Continuity between 34 and body

Check the harness between valve relay
and ABS-ECU, and repair if necessary.

Check the following connector: Check trouble symptoms. Replace the ABS-ECU.
B-30
NG
358-l 6 ABS cFWD> - Troubleshooting

Code No.53 Motor relay, motor Probable cause

This code is output at the following times: l Malfunction of motor relay
l When the motor relay is on but no signal is input to the motor monitor line l Malfunction of wiring harness or connector
(motor 1s not operating, etc.) l Malfunction of hydraulic unit
l When the motor relay is off but a signal is input to the motor monttor line l Malfunction of ABS-ECU
(motor continues operatmg, etc.)
l When the motor relay does not operate

<When the motor does not run>

Caution
The engine should be started and left to run for a while after testing is completed, because
force-driving of the motor by means of the actuator test will drain the battery.
Check the harness between hydraulic
Is the sound of the motor operating
heard for Items 01 - 04 only.
’ No
4 NG
Motor relay check (Refer to P.35B-30.) 1-h Replace the motor relay.
IOK
1 >NG
Motor operation check ’ Replace the hydraulic unit.
(Refer to P.356-30.)
{OK
PNG ~
/ Measure at motor relav connector A-47. IP~I Check the harness between fusible link

l Disconnect the connector and

measure at the harness side.
1l Con$t;;tin;;en 43 - Body 1 , NG )
Check trouble symptoms. l Check the harness between motor
relay and ABS-ECU, and repair if
OK
NG
Check the harness between motor relay * Repair
and hydraulic unit.

1OK
1
NG
* Repair
A-47, B-30
IOK
t
Check trouble symptoms. Replace the ABS-ECU.
 .
ABS <FWD> - Troubleshooting 35B-17

<When the motor keeps running>

Caution
If there is a melted contact in the motor relay, the motor will keep running, even if the ignition
switch is turned off. In this case, immediately remove the fusible link No.8, or disconnect the
hydraulic unit connector A-39 or motor relay connector A-47. Excessive running of the motor will
waste the battery.
NG
w Replace

Yes . Check the harness wire between the

ABS motor relay and hydraulic unit.

v NG
Check the following connectors: * Repair
A-47, B-30
OK
1
Check trouble symptoms.

OK
i
Replace the ABS-ECU.

ABS WARNING LIGHT INSPECTION 35201200062

Check that the ABS warning light illuminates as follows.

When the ignition key is turned to “ON”, the ABS warning
light illuminates for approximately 3 seconds and then
switches off.
When the ignition key is turned to “START”, the ABS
warning light remains illuminated.
When the ignition key is released from the “START”
position, the ABS warning light illuminates for
approximately 3 seconds and then switches off.
ABS war/ning light 16M0235
If the illumination is other than the above, check the
diagnostic trouble codes.
Approx. 3 s Approx. 3 s

Ignition sxJ-m-.
switch
14E0054
LO& 00004487
35B-18 ABS <FWD> - Troubleshooting

INSPECTION CHART FOR TROUBLE SYMPTOMS 35201140135

Get an understanding of the trouble symptoms and check according to the inspection procedure chart.
/
Trouble symptoms Inspection Reference
procedure page
No.

Communication with scan Communication with all systems is not possible. 1 359-19
tool is not possible.
Communication with ABS only is not possible. 2 359-19

When the ignition key is turned to “ON” (engine stopped), the ABS warning light does 3 356-20
not illuminate.

After the engine starts, the ABS warning light remains illuminated. 4 359-20

When the ignition key is turned to “START”, the ABS warning light does not illuminate. 5 359-21

After the ignition key is turned to “ON”, the ABS warning light blinks twice, and when 6 _ 359-21
turned to “START”, it illuminates. When returned to “ON”, the lightflashesonce, and then
switches off.

Faulty ABS operation Unequal braking power on both sides 7 359-22

Insufficient braking power

ABS operates under normal braking conditions

ABS operates before vehicle stops under normal

braking conditions

Large brake pedal vibration (Caution 2.)

Caution
1. If steering movements are made when driving at high speed, or when driving on road surfaces
with low frictional resistance, or when passing over bumps, the ABS may operate even though
sudden braking is not being applied. Because of this, when getting information from the customer,
check if the problem occurred while driving under such conditions as these.
2. During ABS operation, the brake pedal may vibrate or may not be able to be depressed. Such
phenomena are due to intermittent changes in hydraulic pressure inside the brake line to prevent
the wheels from locking and is not an abnormality.
 ABS <FWD> - Troubleshooting 359-l 9

INSPECTION PROCEDURE FOR TROUBLE SYMPTOMS

inspection Procedure 1
Communication with scan tool is not possible. Probable cause
(Communication with all systems is not possible.)
The reason is probably defect in the power supply system (including ground) for the l Malfunction of winng harness or connector
diaonostic line.

1 Refer to GROUP 13A - Troubleshootino

Inspection Procedure 2
Communication with scan tool is not possible. Probable cause
(Communication with ABS only is not possible.)
When communication with the scan tool is not possible, the cause is probably an l Blown fuse
open circuit In the ABS-ECU power circuit or an open crrcurt in the diagnostic output l Malfunction of wiring harness or connector
circuit. l Malfunction of ABS-ECU

Measure at data link connector B-20

l Disconnect the connector and

Data link connect side 1 ! 1

NG
Measure at ABS-ECU connector B-31. w Repair
l Disconnect the connector and / B-31, B-48, B-63
measure at the harness side. r\l/ -. -_ -

-rCheck the harness between fuse No.

NG
Measure at ABS-ECU connectors B-31 w - Check the harness wire between the
and B-30. ABS-ECU and body ground. Repair if
l Disconnect the connector and necessary.
measure at the harness side.
l Continuity between
2, 17, 31, 39 - Body ground
1 OK: Continuity
(OK
7 NG
Check the following connectors: + Repair
B-31, B-30
OK

i Check trouble symptoms. Replace the ABS-ECU.

35B-20 ABS <FWD> - Troubleshooting

Inspection Procedure 3
When ignition key is turned to “ON” (engine stopped), Probable cause
ABS warning light does not illuminate.
The cause may be: an open circuit in the light power supply circuit, a blown light l Blown fuse
bulb, anopencircuit in both thecircuit betweenthe
ABS warmng lightand the ABS-ECU. l Burnt out ABS warning light bulb
l Malfunction of wiring harness or connector

Refer to GROUP 00 - Inspection Ser-

vice Points for Blown Fuse.

Check whether the ABS warning light Replace the ABS warntng light bulb.
bulb is burnt out.

l Ignition switch: ON
l Does the ABS warning light

Replace the combrnation meter.

ECU and connector B-08. Reparr rf nec-

Inspection Procedure 4
Even after the engine is stat-ted, the ABS warning light Probable cause ~
remains illuminated.
The cause is probably a short-circuit in the ABS warning light illumination circuit. l Malfunction of combinatron meter
l Malfunctton of ABS-ECU
0 Malfunction of winng harness

NOTE
This trouble symptom is limited to cases where communication with the scan tool is possible (ABS-ECU
power supply is normal) and the diagnostic trouble code is a normal diagnostic trouble code.

l Disconnect connector B-08 - Reolace the combinatron meter.

l Does the ABS warnmg light remain illuminated?

!No
Yes
l DisconnectABS-ECU connectorB-30andvalverelayconnector - -W Replace the ABS-ECU.
A-46.
l Ignition switch: ON
l Does the ABS warnrng light swatch off?
1No
1
Check the harness between the combination meter and the ABS-
ECU. Repair if necessary.
 .
ABS cFWD> - Troubleshooting 35B-21

Inspection Procedure 5
When the ignition key is turned to “START”, the ABS Probable cause
warning light does not illuminate.
Current does not flow in the ABS-ECU when the ignition switch IS turned to “START”. l Malfunction of wiring harness or connector
Current flows in the ABS warning lrght even when the Ignition switch is turned to l Malfunction of ABS-ECU
“START”. Therefore, the valve relay, which current is supplred through the ABS-ECU,
turns off when the ignition switch is at “START”. However, the warning lrght circuit
of the valve relay must turn on in turn. So the cause must be a defective circuit
on valve relay side.

Disconnect valve relay connector

Disconnect ABS-ECU connector

l Voltage between valve relay

harness-side connector terminal (5)
and body ground
OK: System voltage
OK
1 NG
Check the following connector: * Repair
, A-46
OK
I NG
w Check the harness between the valve
relay and earth. and repair if necessary.

Inspection Procedure 6
After the ignition key is turned to “ON”, the ABS warning Probable cause
light blinks twice, and when turned to “START”, it
illuminates. When returned to “ON”, the light flashes
once, and then switches off.
The ABS-ECU causes the ABS warning light to illuminate during the initial check l Malfunction of wiring harness or connector
(approx. 3 seconds), During the initial check, the valve relay turns from off to on, l Malfunction of ABS-ECU
off and back to on agarn. If there IS an open circuit in the harness between the ABS-ECU
and the ABS warning light, the light will illuminate only when the valve relay is OFF
during valve relay test, etc.

NG
c Check the harness between the com-
A-46.
l Disconnect ABS-ECU connector
B-30.
l Ignition switch: ON
l Voltage between ABS-ECU har-
ness-side connector terminal (44)
and body ground
OK: System voltage
I -..
E
4UK NG
Check the following connector: * Repair
/ B-30
t OK

1Check trouble symptoms. Replace the ABS-ECU.

35B-22 ABS <FWD> - Troubleshooting

Inspection Procedure 7
Brake operation is abnormal. Probable cause
This varies depending on the driving conditions and the road surface condrtrons, so l Improper installation of wheel speed sensor
problem diagnostic trouble is difficult. However, if a normal diagnostic trouble code l Incorrect sensor harness contact
is displayed, carry out the following inspection. 0 Foreign material adhering to wheel speed sensor
l Malfunction of wheel speed sensor
l Malfunction of rotor
l Malfunctron of wheel bearing
l Malfunctron of hydraulrc unit
l Malfunction of ABS-ECU

NG
F Repair

Wheel speed sensor output voltage in- Wheel speed sensor inspection (Refer Replace the wheel speed sensor.
spectron (Refer to P.358-27.) 1NG *j to P.358-39.) ,OK f-
/OK
f
Hydraulic unit check Rotor Inspection (Refer to P.35B-40.)
(Refer to P.358-28.)

vice.)Refer to GROUP 27 - On-vehicle

OK
1 NG
> = Repair
A-09,A-38, E-12, E-l 8, B-53, E-10. B-48 /
‘OK
t @

I
 .
ABS cFWD> - Troubleshooting 35B-23

DATA LIST REFERENCE TABLE 35201150084

The following items can be read by the scan tool from the ABS-ECU input data.

1. When the system is normal

Item No. Check item Checking requirements Normal value

11 Front-right wheel speed sensor Perform a test run Vehicle speeds

displayed on the
12 Front-left wheel speed sensor speedometer
and scan tool
13 Rear-right wheel speed sensor are identical.

14 Rear-left wheel speed sensor

16 ABS-ECU power supply Ignition switch power supply voltage and valve 9-l 6 V
voltage monitor voltage

33 Stop light switch Depress the brake pedal. ON

Release the brake pedal. OFF

2. When the ABS-ECU shut off ABS operation.

When the diagnostic trouble system stops the ABS-ECU, the scan tool display data will be unreliable.

ACTUATOR TEST REFERENCE TABLE 35201160032

The scan tool activates the following actuators for testing.

I. ‘ +-xi ,
NOTE
1. If the ABS-ECU runs down, actuator testing cannot be carried out.
2. Actuator testing is only possible when the vehicle is stationary. If the vehicle speed during actuator
testing exceeds 10 km/h (6 mph), forced actuation will be canceled.
3. During the actuator test, the ABS warning light will illuminate and the anti-lock control will be cancelled.

ACTUATOR TEST SPECIFICATIONS

Activation pattern
No. / Item
01 Solenoid valve for front-left Solenoid valves and pump
!$z; 2TT wheel motors in the hydraulic unit
Solenoid
valve 02 Solenoid valve for front-right (s’mple inspection mode)
/’ wheel
48 ms j 8ms
- 03 Solenoid valve for rear-left
wheel
04 Solenoid valve for rear-right
wheel

NOTE
A: Hydraulic pressure increase
B: Hydraulic pressure holds
C: Hydraulic pressure decrease
35B-24 ABS <FWD> - Troubleshooting

CHECK AT ABS-ECU 35201180113

TERMINAL VOLTAGE CHECK CHART

1. Measure the voltages between terminals (15), (25) and (42) (ground terminals) and each respective
terminal.
NOTE
’ Do not measure terminal voltage for approx. 3 seconds after the ignition switch is turned on. The
ABS-ECU performs the initial check for that period.
2. The terminal layouts are shown in the illustrations below.

t4Y0076

Con- Signal Checking requirements Normal

nectar condition
termi-
nal No.

Output to rear-right so- Ignition switch: ON (When solenoid valve is off) System voltage
“,%a- ._

14 Output to front-left sole-

noid valve (OUT)

15 Output to rear-right so-

lenoid valve (OUT)

16 Output to front-left
solenoid valve (IN)

25 Memory power supply Always System voltage

26 ABS-ECU power supply Ignition switch: ON System voltage

Ignition switch: START ov

33 Input from diagnostic Connect the scan tool. ov

indication selection
Do not connect the scan tool. Approx. 12 V

34 Valve relay monitor Ignition switch: ON System voltage

35 Motor monitor Ignition switch: ON Motor is on. System voltage

Motor is off. 0.5V or less

37 Output to rear-left Ignition switch: ON (When solenoid valve is off) System voltage
solenoid valve (OUT)

38 Output to front-right
solenoid valve (IN)

40 Input from stop light Ignition switch: ON Stop light switch ON System voltage
switch
Stop light switch OFF 1 V or less
 .
ABS <FWD> - Troubleshooting 359-25

Con- Signal Checking requirements Normal

nector condition
termi-
nal No.

41 Scan tool Connect the scan tool. Serial

communication
with scan tool

Do not connect the scan tool. 1 V or less

42 Output to valve relay Ignition switch; ON The relay is on. 2 V or less

The relay is off. The system runs down. System voltage

43 Output to motor relay Ignition switch: ON Motor is on. 2 V or less

Motor is off. System voltage

44 Output to ABS warning Ignition switch: ON The light is switched off. System voltage
light
The light is illuminated. 3 V or less

45 Output to rear-left Ignition switch: ON (When solenoid valve is off) System voltage
solenoid valve (IN)

46 Output to front-right
solenoid valve (OUT)

RESISTANCE AND CONTINUITY BETWEEN HARNESS-SIDE CONNECTOR TERMINALS

1. Turn the ignition switch off and disconnect the ABS-ECU connectors before checking resistance and
continuity.
2. Check them between the terminals indicated in the table below.
3. The terminal layouts are shown in the illustrations below.

14YOO77

Connector terminal No. Signal Normal condition

2 - Body ground ABS-ECU ground Continuity

6-l 9 Front-left wheel speed sensor 1.4 - 1.8 kQ

7-20 Rear-right wheel speed sensor 1.4 - 1.8 kQ

8-21

9-22 Rear-left wheel speed sensor 1.4 - 1.8 kS2

17 - Body ground ABS-ECU ground Continuity

31 - Body ground

39 - Body ground
358-26 ABS cFWD> - On-vehicle Service

ON-VEHICLE SERVICE 35200150092

BLEEDING
Caution
Use the specified brake fluid. Avoid using a mixture of
the specified brake fluid and other fluid.
Specified brake fluid: DOT3 or DOT4
MASTER CYLINDER BLEEDING
The master cylinder used has no check valve, so if bleeding
is carried out by the followina orocedure. bleedina of air from
the brake pipeiine will becom’e easier. (When byake fluid is
no1t contained in the master cylinder.)
Fill the reserve tank with brake fluid.
I:; Keep the brake pedal depressed.
(3) Have another person cover the master cylinder outlet
with a finger.
With the outlet still closed, release the brake pedal.
Repeat steps (2) -(4) three or four times to fill the inside
of the master cylinder with brake fluid.

BRAKE PIPE LINE BLEEDING

Start the engine and bleed the air in the sequence shown
in the figure.
Caution
Be sure to install a filter to the master cylinder reservoir
tank when supplying brake fluid.

14AO4S.a

BRAKE LINING THICKNESS CHECK 35100300128

1. Remove the brake drum.

2. Measure the wear of the brake lining at the place worn
the most.
Standard value: 4.38 mm (.172 in.)
Limit: 1.00 mm (.039 in.)
Replace the shoe and lining assembly if brake lining
thickness is less than the limit if it is not worn evenly.
For information concerning the procedures for installation
of the shoe and lining assembly, refer to P.35B-32.
Caution
1. Whenever the shoe and lining assembly is
replaced, replace both RH and LH assemblies as
a set to prevent car from pulling to one side when
braking.
2. If there is a significant difference in the thickness
of the shoe and lining assemblies on the left and
right sides, check the sliding condition of the
piston.
 .
ABS <FWD> - On-vehicle Service 35B-27

BRAKE DRUM INSIDE DIAMETER CHECK

35100320117

Remove the brake drum.

Measure the inside diameter of the brake drum at two
or more locations.
Standard value: 203 mm (8.0 in.)
Limit: 205 mm (8.1 in.)
Replace brake drums, shoe and lining assembly when
14X0366 wear exceeds the limit value or is badly imbalanced.

BRAKE LINING AND BRAKE DRUM CONTACT

CHECK 35100310121

1. Remove the brake drum.

2. Remove the shoe and lining assembly.
(Refer to P.35B-32.)
3. Chalk inner surface of brake drum and rub with shoe
and lining assembly.
4. Replace shoe and lining assembly or brake drums if there
are any irregular contact area.
NOTE
Clean off chalk after check.

WHEEL SPEED SENSOR OUTPUT VOLTAGE

CHECK 35200160149

Lift up the vehicle and release the parking brake.

Disconnect the ABS-ECU connector, and then use the
special tool (MB991219) to measure the output voltage
at the harness-side connector.

A14Y0077

Rotate the wheel to be measured at approximately 1/2-l

rotation per second, and check the output voltage using
a circuit tester or an oscilloscope.

Wheel Front left Front Rear left Rear

speed right right
sensor
Terminal 6 I
8 I
9 I
7
No.
19 I 21 I 22 I 20

Output voltage
When measuring with a circuit tester:
50 mV or more
When measuring with an oscilloscope:
120 mV p-p or more
If the output voltage is lower than the above values, the
reason could be as follow:
l Faulty wheel speed sensor.
So replace the wheel speed sensor.
35B-28 ABS <FWD> - On-vehicle Service

Inspecting Waveforms With An Oscilloscope

Use the following method to observe the output voltage
When turning by hand waveform from each wheel sensor with an oscilloscope.
l Start the engine, and rotate the front wheels by engaging
1st gear (vehicles with manual transmission) or D range
(vehicles with automatic transmission). Turn the rear
wheels manually so that they rotate at a constant speed.
NOTE
1. Check the connection of the sensor harness and
connector before using the oscilloscope.
2. The waveform measurements can also be taken while
the vehicle is actually moving.
3. The output voltage will be small when the wheel speed
is low. Similarly, it will be large when the wheel speed
is high.

.-1---L_ 10.0 ms/DIV 1 V/DIV i-_-i___

f I I ; ; ’ 1 : ; !
.-:--~---,--,--I--_,___,.____~___1___~___
I ; : I: I; II ;, I I8l&4

Points In Waveform Measurement

Symptom Probable causes Remedy

Too small or zero waveform Faulty wheel speed sensor Replace sensor
amplitude i

Waveform amplitude fluctuates Axle hub eccentric or with large runout Replace hub
excessively if
(this is no problem
the minimum amplitude is 100 mV
or more)

Noisy or disturbed waveform Open circuit in sensor Replace sensor

Open circuit in harness Correct harness

Incorrectly mounted wheel speed sensor Mount correctly

/ Rotor with missing or damaged teeth Replace rotor

NOTE
The wheel speed sensor cable moves following motion of the front or rear suspension. Therefore, it
is likely that it has an open circuit only when driving on rough roads and it functions normally when
driving on smooth roads. It is recommended to observe sensor output voltage waveform also under special
conditions, such as rough road driving.
HYDRAULIC UNIT (HU) CHECK 35200170159

Caution
Turn the ignition switch off before connecting or disconnecting the scan tool.
1. Jack up the vehicle and support the vehicle with jack stands placed at the specified jack-up points
or place the wheels which are checked on the rollers of the braking force tester.
Caution
1. The roller of the braking force tester and the tire should be dry during testing.
2. When testing the front brakes, apply the parking brake. When testing the rear brakes, stop
the front wheels by using a wheel chock. i
 .
ABS cFWD> - On-vehicle Service 35B-29

2. Release the parking brake, and feel the drag force (drag torque) on each road wheel.
When using the braking force tester, take a reading of the brake drag force.
3. Turn the ignition key to the OFF position and set the scan tool.
4. After checking that the shift lever <M/T> or the selector lever <A/T> is in neutral, start the engine.
5. Use the scan tool to force-drive the actuator.
NOTE
1. During the actuator test, the ABS warning light will illuminate and the anti-lock control will be
cancelled.
2. When the ABS has been interrupted by the fail-safe function, the scan tool actuator testing cannot
be used.
6. Turn the wheel by hand and check the change in braking force when the brake pedal is depressed.
When using the braking force tester, depress the brake pedal until the braking force is at the following
values, and check that the braking force decreases when the actuator is force-driven.

Front wheel 1 785-981 N (176 - 220 Ibs.)

Rear wheel 294-490 N (66 - 110 tbs.)

The result should be as shown in the following diagram.

Depressed

Pedal operation
Released Scan tool actuator test
. /I---I 02,03, 04) start

Increase in pressure
Solenoid valve
position
Steady pressure
1 seconds
Reduction in pressure (when not working)
Lock
Checking the
brake force
3 seconds
Drag force when the pedal is free

14x0166

7. If the result of inspection is abnormal, correct according to the Diagnostic Table below.
Diagnostic Table

r
No. Operation Judgement Judgement Probable cause Remedy
- Normal - Abnormal

01 (1) Depress brake pedal Brake force Wheel does not Clogged brake Check and clean
to lock wheel. released for 3 lock when brake line other than brake line
(2) Using the scan tool, seconds after pedal is de- HU
select the wheel to be locking. pressed.
02 checked and force the Clogged hydrau- Replace HU
actuator to operate. lic circuit in HU assembly
(3) Turn the selected
03 wheel manually to Brake force is Incorrect HU Connect correct-
check the change of not released brake tube lY
brake force. connection

04 HU solenoid Replace HU
valve not func- assembly
tioning correctly

8. After inspection, disconnect the scan tool immediately after turning the ignition switch to OFF.
356-30 ABS <FWD> - On-vehicle Service

SOLENOID VALVE CHECK 35201070113

Measure the resistance between terminals.

Standard value:

Solenoid valve Measurement Resistance between

terminals terminals.

Front IN (right side) l-11 8.04 - 9.04 Q

Front IN (left side) 4-11

I I

Rear IN (right side) 3-11

Rear IN (left side) 2-11

Front OUT (right side) 5-11 4.04 - 4.54 n

Front OUT (left side) 8-11

Rear OUT (right side) 7-11

Rear OUT (left side) 6-11

MOTOR OPERATION CHECK 35200180114

Connect the battery and check to be sure that the sound

of the hydraulic unit motor operating can be heard. I
Caution
The battery power should not be applied for more than
1 second.

MOTOR RELAY AND VALVE RELAY

CONTINUITY CHECK 35201090126

Motor relay
Battery voltage Terminal No.
1 2 3 5

Power is not supplied

W---t--I I
@ -
Power is supplied
0 0

Valve relay
Motor relay ’ Valve relay
connector connector Terminal No.

Power is not supplied

2020004 2020003
00004684 Power is supplied
 On-vehicle Service/ .
ABS <FWD> - Master Cylinder and Brake Booster 35B-31

DISCHARGED BATTERY 35200350119

The ABS system consumes a large amount of battery current

for its self-check function. If the battery is completely
discharged and booster cables are used to start the engine,
the engine must be allowed to idle for a few minutes to
recharge. If the battery does not recharge, the engine may
misfire or stall.
To prevent this condition,
0 allow the engine to idle for a few minutes before driving
the vehicle,
or
l temporarily disable the ABS system by removing the
fusible link for the ABS circuit. The ABS warning light
will illuminate when the ABS fusible link is removed. After
the battery is recharged, reinstall the ABS fusible link
and check that the ABS warning light is not illuminated.

MASTER CYLINDER AND BRAKE BOOSTER 35200400142

REMOVAL AND INSTALLATION

Refer to GROUP 35A - Master Cylinder and Brake Booster
MASTER CYLINDER 35209459993

DISASSEMBLY AND REASSEMBLY

Master cylinder kit

1420006

Brake fluid: DOT3 or DOT4

Disassembly steps
1. Reservoir cap assembly Reservoir tank
2. Reservoir cap : Reservoir seal
;. lii$hragm 10 Piston stopper bolt
11 Gasket
5: Brake fluid level sensor 12 Piston stopper ring
6. Float 13 Primary piston assembly
7. Reservoir stopper bolt Secondary piston assembly
1: Master cylinder body
35B-32 ABS <FWD> - Master Cylinder and Brake Booster

DISASSEMBLY SERVICE POINTS

+A, PISTON STOPPER BOLT DISASSEMBLY
While depressing the piston, remove the piston stopper bolt.

+B, PISTON STOPPER RING DISASSEMBLY

While depressing the piston, remove the piston stopper ring.

INSPECTION 35200460027

l Check the inner surface of master cylinder body for rust

or pitting.
l Check the primary and secondary pistons for rust, scoring,
wear, damage or wear.
l Check the diaphragm for cracks and wear.
 .
ABS cFWD> - Rear Drum Brake 35B-33

REAR DRUM BRAKE

REMOVAL AND INSTALLATION
_* Post-installation Operation
Pre-removal Operation
l Loosening the Parking Brake Cable Adjusting Nut. l Brake Line Bleeding (Refer to P.35B-26.)
l Brake Fluid Draining l Parking Brake Lever Stroke Adjustment
(Refer to GROUP 36 - On-vehicle Service.)

15 Nm
_..
49 - 50 Nm
36 - 43 ft.lbs.

_
65 Nm
48 ft.lbs.
A14hl0055

i
:4

Rear drum brake removal steps Wheel cylinder removal steps -

1. Brake drum 1. Brake drum
2. Shoe-to-lever spring 2. Shoe-to-lever spring
3. Adjuster lever 8. Shoe-to-shoe spring
4. Auto adjuster assembly 16. Brake pipe connection
5. Retainer spring 21. Wheel cylinder
6. Shoe hold-down cup
7. Shoe hold-down sprinq Caution
8. Shoe-to-shoe spring - 1. Be careful when handling the pole piece at the .
9. Shoe and lining assembly tip of the speed sensor and the toothed edge
10. Shoe, lining and lever assembly of the rotor so as not to damage them by striking
qA, bB+ 11. Retainer against other parts.
.A+ 12. Wave washer 2. When removing the rear hub assembly, the wheel
13. Parking lever bearing inner race may be left at the spindle
14. Shoe and linina assemblv side. In this case, always replace the rear hub
Shoe hold-dow: pin ’ assembly, otherwise the hub will damage the
Brake pipe connection oil seal, causing oil leaks or excessive play.
Snap ring
Hub cap
Flange nut
Rear hub and rotor assembly
Wheel cylinder
Speed sensor
Backing plate
35B-34 ABS <FWD> - Rear Drum Brake

LUBRICATION POINTS

00004623

Specified grease: Brake grease SAE 5310, NLGI No.1

I
t
Pin of shoe assembly
REMOVAL
(A, RETAINER
SERVICE
REMOVAL
POINT
II

I
Use a flat-tipped screwdriver or the like to open up the retainer
joint, and remove retainer.

m
$
Retainer

INSTALLATION SERVICE POINTS

R .A( WAVE WASHER INSTALLATION
Install the washer in the direction shown in the illustration.

.Bq RETAINER INSTALLATION

Pin of shoe assembly
Use pliers or the like to install the retainer or the pin positively.

=
Retainer
sWLO25l
 .
ABS <FWD> - Rear Drum Brake 35B-35

WHEEL CYLINDER 35200720026

DISASSEMBLY AND REASSEMBLY

6 8 Nm

14SO152

00003564

t
1 Brake fluid: DOT3 or DOT4 Grease: Repair kit grease Wheel cylinder repair kit

Disassembly steps
1. Boots 5. Spring
2. Piston assembly 6. Bleeder
.A+ 3. Pistons 7. Wheel cylinder body
.A+ 4. Piston cups

REASSEMBLY SERVICE POINT

.A+ PISTON CUP/PISTON REASSEMBLY
MB991 008, m
(1) Use alcohol or specified brake fluid to clean the wheel
cylinder and the piston.
(2) Apply the specified brake fluid to the piston cups and
the special tool.
Specified brake fluid: DOT3 or DOT4
(3) Set the piston cup on the special tool with the lip of the
cup facing up, fit the cup onto the special tool, and then
slide it down the outside of the tool into the piston groove.
Caution
In order to keep the piston cup from becoming twisted
or slanted, slide the piston cup down the tool slowly
and carefully, without stopping.

Have the lipfacing

upwards.
B14uoo93
35B-36 ABS <FWD> - Rear Drum Brake/Proportionina Valve

INSPECTION 35100780038

Check the piston and wheel cylinder walls for rust or damage,
and if there is any abnormality, replace the entire wheel cylinder
assembly.

PROPORTIONING VALVE 35200570096

REMOVAL AND INSTALLATION

Pre-removal Operation
l Brake Fluid Draining
l Air Intake Hose Removal
l Air Intake Hose Installation

Flared brake line nuts

15 Nm l --ji ,

14x0343

v ’
14X0146
00004486

Removal steps
,A+ 1. Brake pipe
2. Proportioning valve
3. Bracket

INSTALLATION SERVICE POINT

.A+ BRAKE PIPE CONNECTION
Connect the pipes to the hydraulic unit as shown in the
illustration.
1. Proportioning valve - Rear brake (L.-H.)
2. Proportioning valve - Rear brake (R.H.)
3. Proportioning valve - Hydraulic unit
A14L0340 4. Proportioning valve - Hydraulic unit
 .
ABS <FWD> - Hvdraulic Unit 35B-37

HYDRAULIC UNIT 35200660162

REMOVAL AND INSTALLATION

l Windshield Wiper Motor Installation

l Windshield Wiper Motor RemOVal

l Brake Pedal Adjustment

(Refer to GROUP 35A - On-vehicle SetViCe.)

14M0049

Removal steps
.A+ 1. Brake pipe connection
4A, 2. Hydraulic unit assembly
3. Hydraulic unit bracket

REMOVAL SERVICE POINT

+A, HYDRAULIC UNIT ASSEMBLY REMOVAL

Caution
1. The hydraulic unit assembly is heavy, and so care
should be taken when removing it.
2. The hydraulic unit assembly is not to be disassem-
II
bled; its nuts and bolts should absolutely not be loos-
ened.
3. The hydraulic unit assembly must not be dropped
or otherwise subjected to impact shocks.
4. The hydraulic unit assembly must not be turned
upside down or laid on its side.
35B-38 ABS <FWD> - Hydraulic Unit/Wheel Speed Sensor

INSTALLATION SERVICE POINT

.A+ BRAKE PIPE CONNECTION
Connect the pipes to the hydraulic unit assembly as she
in the illustration.
1. To the proportioning valve (RH)
2. To the proportioning valve (LH)
3. From the master cylinder (Primary)
4. From the master cylinder (Secondary)
5. To the front brake (RH)
A14M0005 6. To the front brake (LH)

WHEEL SPEED SENSOR 35200830156

REMOVAL AND INSTALLATION

1
Post-installation Operation
l Wheel Speed Sensor Output Voltage Check
(Refer to P.356-27 .)

<Front> <Rear>

25 Nm 4
19 ft.lbs.
\
65 Nm
48 ft.lbs.

00004482

14MOO52

Front speed sensor removal steps

1. Front speed. sensor NOTE
2. Front rotor The front rotor is integrated with the drive shaft and is not
(Refer to GROUP 26 - Drive disassembled.
shaft.)

Rear speed sensor removal steps

3. Rear rotor
(Refer to GROUP 27 - Rear Axle
Hub.)
+A, .A+ 4. Rear speed sensor
 ABS cFWD> - Wheel Speed Sensor

REMOVAL SERVICE POINT

+A, FRONT SPEED SENSOR/REAR SPEED SENSOR
REMOVAL

Caution
Be careful when handling the pole piece at the tip of
the speed sensor and the toothed edge of the rotor so
as not to damage them by contacting other parts.

l314soo75

Speed sensor
INSTALLATION SERVICE POINT
,A+ REAR SPEED SENSOR INSTALLATION
Caution
Be careful that the pole piece at the end of the speed
sensor and the rotor teeth do not become damaged by
striking them against the metal parts.
Feeler gauge Rotor Insert a feeler gauge into the space between the speed
sensor’s pole piece and the rotor’s toothed surface, and then
n14M0051 tighten the speed sensor bracket at the position where the
clearance is the standard value all around.
Standard value: 0.1 - 2.0 mm (.004 - .079 in.)

INSPECTION 35200840111

SPEED SENSOR
(1) Check whether any metallic foreign material has adhered
to the pole piece at the speed sensor tip. Remove any
foreign material.
Also check whether the pole piece is damaged. Replace
it with a new one if it is damaged.
NOTE
The pole piece can become magnetized due to the magnet
inside the speed sensor, causing foreign material to easily
adhere to it. The pole piece may not be able to correctly
sense the wheel rotation speed if foreign matter is on
it or if it is damaged.
35B-40 ABS cFWD> - Wheel Speed Sensor

(2) Measure the resistance between the speed sensor

terminals.
Standard value: 1.4 - 1.8 kQ
If the internal resistance of the speed sensor is not within
the standard value, replace with a new speed sensor.
(3) Check the speed sensor cable for breakage, damage
or disconnection. Replace with a new one if a problem
is found.
NOTE
When checking for cable damage, remove the cable clamp
part from the body and then gently bend and pull the
cable near the clamp to check whether or not temporary
disconnection occurs.

SPEED SENSOR INSULATION INSPECTION

(1) Remove all connections from the speed sensor, and then
measure the resistance between terminals (1) and (2)
and the body of the speed sensor.
Standard value: 100 kQ or more
(2) If the speed sensor insulation resistance is outside the
standard value range, replace with a new speed sensor.

TOOTHED ROTOR
Check whether rotor teeth are broken or deformed. Replace
the rotor if the teeth are damaged or deformed.
 .
ABS <FWD> - ABS-ECU 35B-41

ABS-ECU 35200980134

REMOVAL AND INSTALLATION

CAUTION: SRS Pre-removal and Post-installation Operation
When removing and installing the ABS-ECU l Floor Console Removal and Installation
from vehicles equipped with SRS, do not let it (Refer to GROUP 52A.)
bump against the SRS-ECU or other
components.

Removal steps
1. ABS-ECU bracket
2. ABS-ECU

INSPECTION 35200990090

Refer to P.358-24.