ENGINE

SECTION
STARTING SYSTEM
STR STR

E
CONTENTS
BASIC INSPECTION .................................... 2 STARTING SYSTEM ......................................... 12 F
Symptom Table .......................................................12
DIAGNOSIS AND REPAIR WORKFLOW .......... 2
Work Flow ................................................................. 2 PRECAUTION .............................................. 13 G
FUNCTION DIAGNOSIS ............................... 5 PRECAUTIONS ................................................. 13
Precaution for Supplemental Restraint System
STARTING SYSTEM ........................................... 5 (SRS) "AIR BAG" and "SEAT BELT PRE-TEN- H
System Diagram ........................................................ 5 SIONER" .................................................................13
System Description ................................................... 5
Component Parts Location ........................................ 5 PREPARATION ........................................... 14 I
Component Description ............................................ 6
PREPARATION ................................................. 14
COMPONENT DIAGNOSIS .......................... 7 Commercial Service Tools .......................................14
J
B TERMINAL CIRCUIT ....................................... 7 ON-VEHICLE REPAIR ................................. 15
Description ................................................................ 7
Diagnosis Procedure ................................................. 7 STARTER MOTOR ........................................... 15
Exploded View .........................................................15 K
S CONNECTOR CIRCUIT ................................... 8 Removal and Installation .........................................16
Description ................................................................ 8 Inspection ................................................................16
Diagnosis Procedure ................................................. 8 L
SERVICE DATA AND SPECIFICATIONS
STARTING SYSTEM ........................................... 9 (SDS) ............................................................ 21
Wiring Diagram - STARTING SYSTEM - .................. 9
M
SERVICE DATA AND SPECIFICATIONS
SYMPTOM DIAGNOSIS .............................. 12 (SDS) ................................................................. 21
Starter Motor ...........................................................21
N

Revision: 2008 October STR-1 Z51

 DIAGNOSIS AND REPAIR WORKFLOW
< BASIC INSPECTION >
BASIC INSPECTION
DIAGNOSIS AND REPAIR WORKFLOW
Work Flow INFOID:0000000004732334

OVERALL SEQUENCE

JPBIA0502GB

DETAILED FLOW

Revision: 2008 October STR-2 Z51

 DIAGNOSIS AND REPAIR WORKFLOW
< BASIC INSPECTION >
NOTE:
If any malfunction is found, immediately disconnect the battery cable from the negative terminal. A
1.CHECK ENGINE START
Crank the engine and check that the engine starts.
STR
Does the engine start?
YES >> GO TO 2.
NO >> GO TO 3.
C
2.CHECK THAT THE STARTER MOTOR STOPS
Check that the starter motor stops after starting the engine.
Does the starter motor stop? D
YES >> INSPECTION END
NO >> Replace magnetic switch.
E
3.CHECK THE ENGINE SPEED WITH CRANKING
Check that the engine turns at cranking.
Does engine turn by cranking? F
YES >> GO TO 4.
NO >> GO TO 5.
4.CHECK THE ENGINE SPEED WITH CRANKING G
Check that the engine speed is not low at cranking.
Does engine turn normally? H
YES >> Check ignition/fuel system.
NO >> Check charge condition, corrosion and connection condition of the battery. Refer to STR-2, "Work
Flow".
I
5.CHECK STARTER MOTOR ACTIVATION
Check that the starter motor turns at cranking.
Does starter motor turn? J
YES >> GO TO 6.
NO >> GO TO 7.
6.CHECK STARTER MOTOR UNIT K

1. Remove starter motor.

2. Check that the gear shaft of starter motor rotates.
L
Does gear shaft turn?
YES >> Check pinion clutch. Refer to the following. Refer to STR-16, "Inspection".
NO >> Check reduction gear, armature and gear shaft.
M
7.CHECK POWER SUPPLY CIRCUIT
Check the following conditions.
• Fuse and fusible link N
• Charge condition, corrosion and connection condition of the battery. Refer to STR-2, "Work Flow".
Are these inspection results normal?
YES >> GO TO 8. O
NO >> Repair as needed.
8.CHECK STARTING SYSTEM WIRING
P
Check the following.
• “B” terminal circuit. Refer to STR-7, "Diagnosis Procedure".
• “S” terminal circuit. Refer to STR-8, "Diagnosis Procedure".
Are these inspection results normal?
YES >> GO TO 9.
NO >> Repair as needed.

Revision: 2008 October STR-3 Z51

 DIAGNOSIS AND REPAIR WORKFLOW
< BASIC INSPECTION >
9.CHECK MAGNETIC SWITCH OPERATION SOUND
Check that a magnetic switch operation sound can be heard when the ignition switch is set at the starting posi-
tion.
Does magnetic switch operation sound occur?
YES >> GO TO 10.
NO >> Replace magnetic switch.
10.PINION AND RING GEAR ENGAGEMENT CHECK
Check condition of pinion and ring gear mesh.
Is the inspection result normal?
YES >> GO TO 12.
NO >> GO TO 11.
11.CHECK STARTER MOTOR UNIT
Check the following.
• Adjust pinion movement. Refer to the following. Refer to STR-16, "Inspection".
• Check pinion moving mechanism.
• Check ring gear.
Are these inspection results normal?
YES >> INSPECTION END
NO >> Repair or replace, if necessary.
12.CHECK STARTER MOTOR UNIT
Check that the starter motor turns when connecting the positive ter-
minal (12 V) to starter motor terminal M and the negative terminal
(ground) to starter motor body.
Does the starter motor run?
YES >> Replace magnetic switch.
NO >> Repair starter motor.

SEL009Z

Revision: 2008 October STR-4 Z51

 STARTING SYSTEM
< FUNCTION DIAGNOSIS >
FUNCTION DIAGNOSIS A
STARTING SYSTEM
System Diagram INFOID:0000000004324085
STR

I
JPBIA1665GB

J
System Description INFOID:0000000004324086

The starter motor plunger closes and provides a closed circuit between the battery and starter motor. The
starter motor is grounded to the engine block. With power and ground supplied, cranking occurs and the K
engine starts.
Component Parts Location INFOID:0000000004324087
L

O
JPBIA1756ZZ

1. Starter motor 2. BCM 3. TCM

P
4. IPDM E/R
A. Cylinder block left side B. Behind the combination meter C. Engine room dash panel (LH)

Revision: 2008 October STR-5 Z51

 STARTING SYSTEM
< FUNCTION DIAGNOSIS >
Component Description INFOID:0000000004324088

Component part Description

TCM supplies power to the starter relay and starter control relay
TCM inside IPDM E/R when the selector lever is shifted to the P or N
position.
BCM BCM controls the starter relay inside IPDM E/R.
IPDM E/R CPU inside IPDM E/R controls the starter control relay.
The starter motor plunger closes and the motor is supplied with
Starter motor battery power, which in turn cranks the engine, when the “S” ter-
minal is supplied with electric power.

Revision: 2008 October STR-6 Z51

 B TERMINAL CIRCUIT
< COMPONENT DIAGNOSIS >
COMPONENT DIAGNOSIS A
B TERMINAL CIRCUIT
Description INFOID:0000000004324089
STR
The “B” terminal is constantly supplied with battery power.
Diagnosis Procedure INFOID:0000000004324090 C

CAUTION:
Perform diagnosis under the condition that engine cannot start by the following procedure.
1. Remove fuel pump fuse. D
2. Crank or start the engine (where possible) until the fuel pressure is released.
1.CHECK “B” TERMINAL CIRCUIT E
1. Turn ignition switch OFF.
2. Check that starter motor “B” terminal connection is clean and tight.
3. Check voltage between starter motor “B” terminal and ground.
F
Terminals
(+) Voltage (Approx.)
(–) G
Starter motor “B” terminal Terminal
F10 2 Ground Battery voltage
Is the inspection result normal? H
YES >> GO TO 2.
NO >> Check harness between battery and starter motor for open circuit.
2.CHECK BATTERY CABLE CONNECTION STATUS (VOLTAGE DROP TEST) I

1. Shift the selector lever to “P” or “N” position.

2. Check voltage between battery positive terminal and starter motor “B” terminal. J
Terminals
(–)
Condition Voltage (Approx.) K
(+) Starter motor
Terminal
“B” terminal
When the ignition switch is Less than L
Battery positive terminal F10 2
in START position 0.5 V
Is the inspection result normal?
YES >> GO TO 3. M
NO >> Check harness between the battery and the starter motor for poor continuity.
3.CHECK GROUND CIRCUIT STATUS (VOLTAGE DROP TEST)
1. Shift the selector lever to “P” or “N” position. N
2. Check voltage between starter motor case and battery negative terminal.

Terminals O
Condition Voltage (Approx.)
(+) (–)
When the ignition switch is in
Starter motor case Battery negative terminal Less than 0.2 V P
START position
Is the inspection result normal?
YES >> “B” terminal circuit is OK. Further inspection is necessary. Refer to STR-2, "Work Flow".
NO >> Check the starter motor case and ground for poor continuity.

Revision: 2008 October STR-7 Z51

 S CONNECTOR CIRCUIT
< COMPONENT DIAGNOSIS >
S CONNECTOR CIRCUIT
Description INFOID:0000000004324091

The starter motor magnetic switch is supplied with power when the ignition switch is turned to the START posi-
tion while the selector lever is in the P or N position.
Diagnosis Procedure INFOID:0000000004324092

CAUTION:
Perform diagnosis under the condition that engine cannot start by the following procedure.
1. Remove fuel pump fuse.
2. Crank or start the engine (where possible) until the fuel pressure is released.
1.CHECK “S” CONNECTOR CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect starter motor connector.
3. Shift the selector lever to “P” or “N” position.
4. Check voltage between starter motor harness connector and ground.

Terminals
(+)
Condition Voltage (Approx.)
Starter motor har- (–)
Terminal
ness connector
When the ignition switch is in
F47 1 Ground Battery voltage
START position
Is the inspection result normal?
YES >> “S” connector circuit is OK. Further inspection is necessary. Refer to STR-2, "Work Flow".
NO >> GO TO 2.
2.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
1. Disconnect IPDM E/R connector.
2. Check continuity between starter motor harness connector and IPDM E/R harness connector.

Starter motor harness connector IPDM E/R harness connector

Continuity
Connector No. Terminal No. Connector No. Terminal No.
F47 1 F12 80 Existed
Is the inspection result normal?
YES >> Further inspection is necessary. Refer to STR-2, "Work Flow" in SEC section.
NO >> Repair the harness.

Revision: 2008 October STR-8 Z51

 STARTING SYSTEM
< COMPONENT DIAGNOSIS >
STARTING SYSTEM
A
Wiring Diagram - STARTING SYSTEM - INFOID:0000000004324093

STR

P
JCBWM1090GB

Revision: 2008 October STR-9 Z51

 STARTING SYSTEM
< COMPONENT DIAGNOSIS >

JCBWM1091GB

Revision: 2008 October STR-10 Z51

 STARTING SYSTEM
< COMPONENT DIAGNOSIS >

STR

JCBWM1092GB

Revision: 2008 October STR-11 Z51

 STARTING SYSTEM
< SYMPTOM DIAGNOSIS >
SYMPTOM DIAGNOSIS
STARTING SYSTEM
Symptom Table INFOID:0000000004324094

Symptom Reference
No normal cranking
Refer to STR-2, "Work Flow".
Starter motor does not rotate

Revision: 2008 October STR-12 Z51

 PRECAUTIONS
< PRECAUTION >
PRECAUTION A
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT STR
PRE-TENSIONER" INFOID:0000000004833596

The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along C
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. Information necessary to service the system safely is included in the “SRS AIRBAG” and
“SEAT BELT” of this Service Manual.
WARNING: D
• To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in
the event of a collision which would result in air bag inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer. E
• Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal
injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag
Module, see the “SRS AIRBAG”.
F
• Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or har-
ness connectors.
G
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
WARNING:
• When working near the Airbag Diagnosis Sensor Unit or other Airbag System sensors with the igni- H
tion ON or engine running, DO NOT use air or electric power tools or strike near the sensor(s) with a
hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly causing
serious injury.
• When using air or electric power tools or hammers, always switch the ignition OFF, disconnect the I
battery, and wait at least 3 minutes before performing any service.

Revision: 2008 October STR-13 Z51

 PREPARATION
< PREPARATION >
PREPARATION
PREPARATION
Commercial Service Tools INFOID:0000000004324097

Tool name Description

Power tool Loosening bolts, nuts and screws

PIIB1407E

Revision: 2008 October STR-14 Z51

 STARTER MOTOR
< ON-VEHICLE REPAIR >
ON-VEHICLE REPAIR A
STARTER MOTOR
Exploded View INFOID:0000000004324098
STR

REMOVAL
C

J
JPBIA1922GB

1. Converter housing 2. Starter motor “B” terminal harness 3. Starter motor “B” terminal nut K
4. Starter motor mounting bolt 5. Starter motor 6. Starter motor “S” connector
Refer to GI-4, "Components" for symbols in the figure.
L
DISASSEMBLY

Revision: 2008 October STR-15 Z51

 STARTER MOTOR
< ON-VEHICLE REPAIR >
Type:M000TA0072

JPBIA1777GB

1. Magnetic switch assembly 2. Dust cover kit 3. Gear case assembly

4. Pinion assembly 5. Stopper 6. Ring
7. Ring 8. Stopper 9. Yoke assembly
10. Armature assembly 11. Brush holder assembly 12. Metal
13. Rear cover 14. Gear assembly 15. Shift lever set
16. Clutch gear assembly 17. Center bracket 18. Packing
19. Gear shaft
Refer to GI-4, "Components" for symbols not described on the above.

Removal and Installation INFOID:0000000004324099

REMOVAL
1. Remove the battery. Refer to PG-129, "Removal and Installation".
2. Remove the air cleaner assembly and air ducts.
3. Disconnect the following unit connectors:
• ECM
• TCM
• IPDM E/R
4. Remove the battery tray.
5. Disconnect the starter motor harness connectors.
6. Remove the starter motor mounting bolts, using power tools.
7. Remove the starter motor.
INSTALLATION
Installation is in the reverse order of removal.
Inspection INFOID:0000000004789308

MAGNETIC SWITCH
• Before starting to check, disconnect the battery cable from the negative terminal.

Revision: 2008 October STR-16 Z51

 STARTER MOTOR
< ON-VEHICLE REPAIR >
• Disconnect “M” terminal of starter motor.
1. Continuity test (between “S” terminal and switch body) A

A : “S” terminal
B : “B” terminal STR
C : “M” terminal
• Replace magnetic switch if continuity does not exist.
C

SKIB9002E
D

2. Continuity test (between “S” terminal and “M” terminal)

E
A : “S” terminal
B : “B” terminal
C : “M” terminal F
• Replace magnetic switch if continuity does not exist.

SKIB9003E
H
PINION PROTRUSION LENGTH
• Compare movement “L” in height of pinion when it is pushed out
with magnetic switch energized and when it is pulled out by hand
I
until it touches stopper.

Movement “L” : Refer to SDS STR-21,

"Starter Motor". J

SKIB0230E

L
• If the measurement value is not in the specified area, adjust with
the adjusting plate.
M

O
JPBIA1984ZZ

PINION ASSEMBLY
P

Revision: 2008 October STR-17 Z51

 STARTER MOTOR
< ON-VEHICLE REPAIR >
1. Inspect pinion teeth.
• Replace pinion if teeth are worn or damaged. (Also check con-
dition of ring gear teeth.)
2. Inspect reduction gear teeth.
• Replace reduction gear if teeth are worn or damaged. (Also
check condition of armature shaft gear teeth.)
3. Check to see if pinion locks in one direction and rotates
smoothly in the opposite direction.
• Replace pinion assembly if it is locked or rotated in both direc-
tions or unusual resistance is evident.
SEL630BA

BRUSH HOLDER ASSEMBLY

Brush
• Check wear of brush.

Minimum length of brush : Refer to SDS STR-21,

"Starter Motor".
• Replace brush if the measurement value is less than the specified
value.

SEL014Z

Brush Spring
• Check brush spring tension with brush spring detached from
brush.

Spring tension (with new : Refer to SDS STR-21,

brush) "Starter Motor".
• Replace brush spring if the measurement value is less than the
specified value.

SEL015Z

Brush Holder
1. Perform insulation test between brush holder (positive side) and
its base (negative side).
- Replace brush holder assembly if continuity does not exist.
2. Check brush to see if it moves smoothly.
- If brush holder is bent, replace it if sliding surface is dirty, clean.

SKIB0460E

YOKE CHECK

Revision: 2008 October STR-18 Z51

 STARTER MOTOR
< ON-VEHICLE REPAIR >
Magnet is secured to yoke by bonding agent. Check magnet to see
that it is secured to yoke and for any cracks. Replace malfunctioning A
parts as an assembly.
CAUTION:
Never clamp yoke in a vise or strike it with a hammer.
STR

SEL305H

D
ARMATURE CHECK
1. Continuity test (between two segments side by side)
- Replace if continuity does not exist.
2. Insulation test (between each commutator bar and shaft) E
- Replace if continuity exists.

SKIB0461E

H
3. Check commutator surface.
- Grind commutator with No. 500 – 600 emery paper if the surface
is rough.
I

SEL020Z

L
4. Check diameter of commutator.

Commutator minimum di- : Refer to SDS STR-21,

M
ameter "Starter Motor".
- Replace armature assembly if the measurement value is less
than the specified value.
N

O
SEL021Z

Revision: 2008 October STR-19 Z51

 STARTER MOTOR
< ON-VEHICLE REPAIR >
5. Check depth of insulating mold from commutator surface.
- Undercut to 0.5 to 0.8 mm (0.020 to 0.031 in) if the depth is 0.2
mm (0.008 in) or less.

SEL022Z

Revision: 2008 October STR-20 Z51

 SERVICE DATA AND SPECIFICATIONS (SDS)
< SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS) A
SERVICE DATA AND SPECIFICATIONS (SDS)
Starter Motor INFOID:0000000004324101
STR

M000TA0072
C
Type MITSUBISHI make
Reduction gear type
System voltage (V) 12 D
Terminal voltage (V) 11
No-load Current (A) Less than 90
E
Revolution (rpm) More than 2,400
Minimum diameter of commutator [mm (in)] 28.0 (1.102)
Minimum length of brush [mm (in)] 5.5 (0.217) F
Brush spring tension [N (kg, lb)] 15.0 - 20.4 (1.5 - 2.1, 3.4 - 4.6)
Clearance between bearing metal and armature shaft [mm (in)] Less than 0.2 (0.008)
Clearance between pinion front edge and pinion stopper [mm (in)] 0.5 - 2.0 (0.020 - 0.079) G

Revision: 2008 October STR-21 Z51