ENGINE

SECTION STR
STARTING SYSTEM
STR

E
CONTENTS
BASIC INSPECTION .................................... 2 SYMPTOM DIAGNOSIS .............................. 15 F

DIAGNOSIS AND REPAIR WORKFLOW .......... 2 STARTING SYSTEM ......................................... 15

Work Flow ................................................................. 2 Symptom Table .......................................................15 G
FUNCTION DIAGNOSIS ............................... 5 PRECAUTION .............................................. 16
STARTING SYSTEM ........................................... 5 PRECAUTIONS ................................................. 16 H
Precaution for Supplemental Restraint System
MR20DE ....................................................................... 5 (SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
MR20DE : System Diagram ...................................... 5 SIONER" .................................................................16
MR20DE : System Description .................................. 5 I
MR20DE : Component Parts Location ...................... 5 ON-VEHICLE REPAIR ................................. 17
MR20DE : Component Description .......................... 6
STARTER MOTOR ........................................... 17 J
VQ25DE ....................................................................... 6
VQ25DE : System Diagram ...................................... 6 MR20DE .....................................................................17
VQ25DE : System Description .................................. 6 MR20DE : Exploded View .......................................17
VQ25DE : Component Parts Location ...................... 7 MR20DE : Removal and Installation ........................18 K
VQ25DE : Component Description ........................... 7 MR20DE : Inspection ...............................................19

VQ35DE ....................................................................... 7 VQ25DE .....................................................................22 L

VQ35DE : System Diagram ...................................... 8 VQ25DE : Exploded View ........................................22
VQ35DE : System Description .................................. 8 VQ25DE : Removal and Installation ........................23
VQ35DE : Component Parts Location ...................... 8 VQ25DE : Inspection ...............................................23
M
VQ35DE : Component Description ........................... 8
VQ35DE .....................................................................27
COMPONENT DIAGNOSIS ......................... 10 VQ35DE : Exploded View ........................................27
VQ35DE : Removal and Installation ........................28 N
B TERMINAL CIRCUIT ......................................10 VQ35DE : Inspection ...............................................29
Description .............................................................. 10
Diagnosis Procedure ............................................... 10 SERVICE DATA AND SPECIFICATIONS
(SDS) ............................................................ 33 O
S TERMINAL CIRCUIT ......................................11
Description .............................................................. 11 SERVICE DATA AND SPECIFICATIONS
Diagnosis Procedure ............................................... 11 (SDS) ................................................................. 33 P
Starter Motor ...........................................................33
STARTING SYSTEM ..........................................12
Wiring Diagram - STARTING SYSTEM - ................ 12

Revision: 2008 December STR-1 J32

 DIAGNOSIS AND REPAIR WORKFLOW
< BASIC INSPECTION >
BASIC INSPECTION
DIAGNOSIS AND REPAIR WORKFLOW
Work Flow INFOID:0000000003769294

OVERALL SEQUENCE

JPBIA0502GB

DETAILED FLOW

Revision: 2008 December STR-2 J32

 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.
• MR20DE models: STR-19, "MR20DE : Inspection".
M
• VQ25DE models: STR-23, "VQ25DE : Inspection".
• VQ35DE models: STR-29, "VQ35DE : Inspection".
NO >> Check reduction gear, armature and gear shaft.
N
7.CHECK POWER SUPPLY CIRCUIT
Check the following conditions.
• Fuse and fusible link O
• Charge condition, corrosion and connection condition of the battery. Refer to STR-2, "Work Flow".
Are these inspection results normal?
YES >> GO TO 8. P
NO >> Repair as needed.
8.CHECK STARTING SYSTEM WIRING
Check the following.
• “B” terminal circuit. Refer to STR-10, "Diagnosis Procedure".
• “S” terminal circuit. Refer to STR-11, "Diagnosis Procedure".
Are these inspection results normal?

Revision: 2008 December STR-3 J32

 DIAGNOSIS AND REPAIR WORKFLOW
< BASIC INSPECTION >
YES >> GO TO 9.
NO >> Repair as needed.
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.
- MR20DE models: STR-19, "MR20DE : Inspection"
- VQ25DE models: STR-23, "VQ25DE : Inspection"
- VQ35DE models: STR-29, "VQ35DE : 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 December STR-4 J32

 STARTING SYSTEM
< FUNCTION DIAGNOSIS >
FUNCTION DIAGNOSIS A
STARTING SYSTEM
MR20DE
STR
MR20DE : System Diagram INFOID:0000000003769295

JPBIA1991GB
J

MR20DE : System Description INFOID:0000000003769296

K
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
engine starts.
L
MR20DE : Component Parts Location INFOID:0000000003769297

JSBIA0017ZZ

Revision: 2008 December STR-5 J32

 STARTING SYSTEM
< FUNCTION DIAGNOSIS >

1. Starter motor 2. IPDM E/R 3. Park/neutral position switch

A. Engine B. Engine room (left side) C. CVT assembly
: Vehicle front

MR20DE : Component Description INFOID:0000000003769298

Component part Description

Park/neutral position switch supplies power to the starter relay in-
Park/neutral position switch side IPDM E/R when the selector lever is shifted to the P or N po-
sition.
CPU inside IPDM E/R controls the starter relay. Ignition relay in-
IPDM E/R side IPDM E/R supplies power to the park/neutral position switch
when ignition switch is ON or START.
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.

VQ25DE
VQ25DE : System Diagram INFOID:0000000003859438

JPBIA1991GB

VQ25DE : System Description INFOID:0000000003859439

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
engine starts.

Revision: 2008 December STR-6 J32

 STARTING SYSTEM
< FUNCTION DIAGNOSIS >
VQ25DE : Component Parts Location INFOID:0000000003859440

STR

JPBIA2353ZZ
F
1. Park/neutral position switch 2. Starter motor 3. IPDM E/R
A. CVT assembly B. Engine room dash panel (LH)
G
VQ25DE : Component Description INFOID:0000000003859441

H
Component part Description
Park/neutral position switch supplies power to the starter relay in-
Park/neutral position switch side IPDM E/R when the selector lever is shifted to the P or N po- I
sition.
CPU inside IPDM E/R controls the starter relay. Ignition relay in-
IPDM E/R side IPDM E/R supplies power to the park/neutral position switch
J
when ignition switch is ON or START.
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. K

VQ35DE
L

Revision: 2008 December STR-7 J32

 STARTING SYSTEM
< FUNCTION DIAGNOSIS >
VQ35DE : System Diagram INFOID:0000000003769277

JPBIA1665GB

VQ35DE : System Description INFOID:0000000003769278

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
engine starts.
VQ35DE : Component Parts Location INFOID:0000000003769279

JPBIA1756ZZ

1. Starter motor 2. BCM 3. TCM

4. IPDM E/R
A. Converter housing B. Behind the combination meter C. Engine room dash panel (LH)

VQ35DE : Component Description INFOID:0000000003769280

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.

Revision: 2008 December STR-8 J32

 STARTING SYSTEM
< FUNCTION DIAGNOSIS >
Component part Description
A
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. STR

Revision: 2008 December STR-9 J32

 B TERMINAL CIRCUIT
< COMPONENT DIAGNOSIS >
COMPONENT DIAGNOSIS
B TERMINAL CIRCUIT
Description INFOID:0000000003769299

The “B” terminal is constantly supplied with battery power.

Diagnosis Procedure INFOID:0000000003769300

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 “B” TERMINAL CIRCUIT
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.

Terminals
(+) Voltage (Approx.)
(–)
Starter motor “B” terminal Terminal
F52 (MR20DE)
F49 (VQ25DE) 2 Ground Battery voltage
F10 (VQ35DE)
Is the inspection result normal?
YES >> GO TO 2.
NO >> Check harness between battery and starter motor for open circuit.
2.CHECK BATTERY CABLE CONNECTION STATUS (VOLTAGE DROP TEST)
1. Shift the selector lever to “P” or “N” position.
2. Check voltage between battery positive terminal and starter motor “B” terminal.

Terminals
(–)
Condition Voltage (Approx.)
(+) Starter motor
Terminal
“B” terminal
F52 (MR20DE)
When the ignition switch is Less than
Battery positive terminal F49 (VQ25DE) 2
in START position 0.5 V
F10 (VQ35DE)
Is the inspection result normal?
YES >> GO TO 3.
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.
2. Check voltage between starter motor case and battery negative terminal.

Terminals
Condition Voltage (Approx.)
(+) (–)
When the ignition switch is in
Starter motor case Battery negative terminal Less than 0.2 V
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 December STR-10 J32

 S TERMINAL CIRCUIT
< COMPONENT DIAGNOSIS >
S TERMINAL CIRCUIT
A
Description INFOID:0000000003769301

The starter motor magnetic switch is supplied with power when the ignition switch is turned to START with the STR
selector lever “P” or “N”.
Diagnosis Procedure INFOID:0000000003769302

C
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. D

1.CHECK “S” CONNECTOR CIRCUIT

1. Turn ignition switch OFF. E
2. Disconnect “S” terminal.
3. Shift the selector lever to “P” or “N” position.
4. Check voltage between starter motor harness connector and ground.
F
Terminals
(+)
Condition Voltage (Approx.) G
Starter motor harness (–)
Terminal
connector
F53 (MR20DE) H
When the ignition switch
F50 (VQ25DE) 1 Ground Battery voltage
is in START position
F47 (VQ35DE)
Is the inspection result normal?
I
YES >> “S” terminal circuit is OK. Further inspection is necessary. Refer to STR-2, "Work Flow".
NO >> GO TO 2.
2.CHECK HARNESS CONTINUITY (OPEN CIRCUIT) J
1. Disconnect IPDM E/R connector.
2. Check continuity between starter motor “S” terminal and IPDM E/R harness connector.
K
Starter motor “S” terminal IPDM E/R harness connector
Continuity
Connector No. Terminal No. Connector No. Terminal No.
F53 (MR20DE) L
F50 (VQ25DE) 1 E10 80 Existed
F47 (VQ35DE)
Is the inspection result normal? M
YES >> Inspect IPDM E/R and power supply circuit. Refer to STR-2, "Work Flow".
NO >> Repair the harness.
N

Revision: 2008 December STR-11 J32

 STARTING SYSTEM
< COMPONENT DIAGNOSIS >
STARTING SYSTEM
Wiring Diagram - STARTING SYSTEM - INFOID:0000000003769303

JCBWM0858GB

Revision: 2008 December STR-12 J32

 STARTING SYSTEM
< COMPONENT DIAGNOSIS >

STR

JCBWA1206GB

Revision: 2008 December STR-13 J32

 STARTING SYSTEM
< COMPONENT DIAGNOSIS >

JCBWA1207GB

Revision: 2008 December STR-14 J32

 STARTING SYSTEM
< SYMPTOM DIAGNOSIS >
SYMPTOM DIAGNOSIS A
STARTING SYSTEM
Symptom Table INFOID:0000000003769305
STR

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

Revision: 2008 December STR-15 J32

 PRECAUTIONS
< PRECAUTION >
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER" INFOID:0000000004987750

The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
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 AIR BAG” and
“SEAT BELT” of this Service Manual.
WARNING:
• 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.
• 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 AIR BAG”.
• 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.
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
WARNING:
• When working near the Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the
ignition 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
battery, and wait at least 3 minutes before performing any service.

Revision: 2008 December STR-16 J32

 STARTER MOTOR
< ON-VEHICLE REPAIR >
ON-VEHICLE REPAIR A
STARTER MOTOR
MR20DE
STR
MR20DE : Exploded View INFOID:0000000003769307

REMOVAL C

PKIC8095E

I
1. “S” terminal harness 2. “B” terminal harness 3. Starter motor
4. Cylinder block
: Vehicle front J
Refer to GI-4, "Components" for symbols in the figure.

DISASSEMBLY
K

Revision: 2008 December STR-17 J32

 STARTER MOTOR
< ON-VEHICLE REPAIR >
Type: S114-902

JPBIA0549GB

1. Magnetic switch assembly 2. Dust cover kit 3. Shift lever set

4. Center bracket (A) 5. Yoke assembly 6. Armature assembly
7. Brush holder assembly 8. Thrust washer 9. Rear cover assembly
10. Internal gear 11. Planetary gear 12. Pinion shaft
13. Packing 14. Thrust washer 15. Center bracket (P)
16. E-ring 17. Pinion assembly 18. Pinion stopper
19. Pinion stopper clip 20. Gear case assembly
: High-temperature grease point
Refer to GI-4, "Components" for symbols not described on the above.

NOTE:
Apply high-temperature grease to lubricate the bearing, gears and frictional surface when assembling the
starter.
MR20DE : Removal and Installation INFOID:0000000003769308

REMOVAL
1. Disconnect the battery cable from the negative terminal.
2. Remove air duct (inlet). Refer to EM-27, "Exploded View".
3. Disconnect oil pressure switch connector.
4. Remove “B” terminal nut and “B” terminal harness.
5. Remove “S” terminal nut and “S” terminal harness.
6. Remove starter motor mounting bolts.
7. Remove starter motor upward from the vehicle.
INSTALLATION
Install in the reverse order of removal.
CAUTION:
Be sure to tighten “B” terminal nut carefully.

Revision: 2008 December STR-18 J32

 STARTER MOTOR
< ON-VEHICLE REPAIR >
MR20DE : Inspection INFOID:0000000003821408

A
MAGNETIC SWITCH
• Before starting to check, disconnect the battery cable from the negative terminal.
• Disconnect “M” terminal of starter motor. STR
1. Continuity test (between “S” terminal and switch body)

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

E
SKIB9002E

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

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

SKIB9003E
I

PINION PROTRUSION LENGTH

• With pinion driven out by magnetic switch, push pinion back to J
remove slack and measure the clearance “L” between the front
edge of the pinion and the pinion stopper.

Clearance “L” : Refer to SDS STR-33, K

"Starter Motor".

SKIB0229E
M

• If the measurement value is not in the specified area, adjust with

the adjusting plate.
N

PKID0786E

PINION ASSEMBLY

Revision: 2008 December STR-19 J32

 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-33,

"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-33,

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 December STR-20 J32

 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-33,

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

O
SEL021Z

Revision: 2008 December STR-21 J32

 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

VQ25DE
VQ25DE : Exploded View INFOID:0000000003820811

REMOVAL

JPBIA2371GB

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

Revision: 2008 December STR-22 J32

 STARTER MOTOR
< ON-VEHICLE REPAIR >
DISASSEMBLY
A
Type: S114-936

STR

JSAIA0936GB

I
1. Magnetic switch assembly 2. Adjusting plate 3. Dust cover
4. Shift lever set 5. Pinion stopper clip 6. Pinion stopper
7. Pinion 8. Pinion spring 9. Gear case assembly
J
10. Center bracket (A) 11. Yoke assembly 12. Armature assembly
13. Brush holder assembly 14. Thrust washer 15. Rear cover
16. Internal gear 17. Planetary gear 18. Pinion stopper K
19. Packing 20. Thrust washer 21. Center bracket (P)
22. Thrust washer 23. E-ring 24. Clutch gear assembly
Refer to GI-4, "Components" for symbols not described on the above. L
VQ25DE : Removal and Installation INFOID:0000000003820812

M
REMOVAL
1. Remove the battery. Refer to PG-144, "Removal and Installation".
2. Remove the air cleaner assembly and air ducts. N
3. Disconnect the following unit connectors:
• ECM
• IPDM E/R
O
4. Remove the battery tray.
5. Remove the “B” terminal nut and “S” terminal nut.
6. Remove the starter motor mounting bolts. P
7. Remove the starter motor upward from the vehicle.
INSTALLATION
Installation is in the reverse order of removal.
VQ25DE : Inspection INFOID:0000000003769309

MAGNETIC SWITCH
Revision: 2008 December STR-23 J32
 STARTER MOTOR
< ON-VEHICLE REPAIR >
• Before starting to check, disconnect the battery cable from the negative terminal.
• Disconnect “M” terminal of starter motor.
1. Continuity test (between “S” terminal and switch body)

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

SKIB9002E

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

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

SKIB9003E

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
until it touches stopper.

Movement “L” : Refer to SDS STR-33,

"Starter Motor".

SKIB0230E

• If the measurement value is not in the specified area, adjust with

the adjusting plate.

JPBIA1984ZZ

PINION ASSEMBLY

Revision: 2008 December STR-24 J32

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

D
BRUSH HOLDER ASSEMBLY
Brush
• Check wear of brush. E

Minimum length of brush : Refer to SDS STR-33,

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

SEL014Z H
Brush Spring
• Check brush spring tension with brush spring detached from
brush. I

Spring tension (with new : Refer to SDS STR-33,

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

SEL015Z

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

O
SKIB0460E

YOKE CHECK P

Revision: 2008 December STR-25 J32

 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
parts as an assembly.
CAUTION:
Never clamp yoke in a vise or strike it with a hammer.

SEL305H

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)
- Replace if continuity exists.

SKIB0461E

3. Check commutator surface.

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

SEL020Z

4. Check diameter of commutator.

Commutator minimum di- : Refer to SDS STR-33,

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

SEL021Z

Revision: 2008 December STR-26 J32

 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 A
mm (0.008 in) or less.

STR

G
SEL022Z

VQ35DE
H
VQ35DE : Exploded View INFOID:0000000003769290

REMOVAL
I

JPBIA1922GB

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

Revision: 2008 December STR-27 J32

 STARTER MOTOR
< ON-VEHICLE REPAIR >
DISASSEMBLY
Type: M000TA0072

JPBIA1777GB

1. Magnetic switch assembly 2. Adjusting plate 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.

VQ35DE : Removal and Installation INFOID:0000000003769291

REMOVAL
1. Remove the battery. Refer to PG-144, "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 “B” terminal nut.
7. Remove the starter motor mounting bolts.
8. Remove the starter motor upward from the vehicle.
INSTALLATION
Installation is in the reverse order of removal.

Revision: 2008 December STR-28 J32

 STARTER MOTOR
< ON-VEHICLE REPAIR >
VQ35DE : Inspection INFOID:0000000003821409

A
MAGNETIC SWITCH
• Before starting to check, disconnect the battery cable from the negative terminal.
• Disconnect “M” terminal of starter motor. STR
1. Continuity test (between “S” terminal and switch body)

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

E
SKIB9002E

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

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

SKIB9003E
I

PINION PROTRUSION LENGTH

• Compare movement “L” in height of pinion when it is pushed out J
with magnetic switch energized and when it is pulled out by hand
until it touches stopper.

Movement “L” : Refer to SDS STR-33, K

"Starter Motor".

SKIB0230E
M

• If the measurement value is not in the specified area, adjust with

the adjusting plate.
N

JPBIA1984ZZ

PINION ASSEMBLY

Revision: 2008 December STR-29 J32

 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-33,

"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-33,

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 December STR-30 J32

 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-33,

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

O
SEL021Z

Revision: 2008 December STR-31 J32

 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 December STR-32 J32

 SERVICE DATA AND SPECIFICATIONS (SDS)
< SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS) A
SERVICE DATA AND SPECIFICATIONS (SDS)
Starter Motor INFOID:0000000003769316
STR

Applied model MR20DE VQ25DE VQ35DE

C
S114-902 S114-936 M000TA0072
Type HITACHI make HITACHI make MITSUBISHI make
Reduction gear type D
System voltage [V] 12
Terminal voltage [V] 11
E
No-load Current [A] Less than 110 Less than 90 Less than 90
Revolution [rpm] More than 3,000 More than 2,700 More than 2,400
Minimum diameter of commutator [mm (in)] 28.0 (1.102) 28.0 (1.102) 28.0 (1.102) F
Minimum length of brush [mm (in)] 10.5 (0.413) 10.5 (0.413) 5.5 (0.217)
15.0 – 20.4 (1.5 – 2.1,
Brush spring tension [N (kg, lb)] 16.2 (1.65, 3.64) 16.2 (1.65, 3.64)
3.4 – 4.6) G
Clearance between bearing metal and armature Less than 0.2
[mm (in)] Less than 0.2 (0.008) Less than 0.2 (0.008)
shaft (0.008)
Clearance “L” between pinion front edge and pin- 0.3 – 2.5 (0.012 – H
[mm (in)] — —
ion stopper 0.098)
0.3 – 2.5 (0.012 – 0.5 – 2.0 (0.020 –
Movement “L” in height of pinion assembly [mm (in)] —
0.098) 0.079) I

Revision: 2008 December STR-33 J32