ENGINE

SECTION
STARTING SYSTEM
STR STR

E
CONTENTS
VQ35DE STARTING SYSTEM ......................................... 12 F
Symptom Table .......................................................12
BASIC INSPECTION .................................... 2
PRECAUTION .............................................. 13 G
DIAGNOSIS AND REPAIR WORKFLOW .......... 2
Work Flow ................................................................. 2 PRECAUTIONS ................................................. 13
Precaution for Supplemental Restraint System
FUNCTION DIAGNOSIS ............................... 5 (SRS) "AIR BAG" and "SEAT BELT PRE-TEN- H
SIONER" .................................................................13
STARTING SYSTEM ........................................... 5 Precautions Necessary for Steering Wheel Rota-
System Diagram ........................................................ 5 tion after Battery Disconnect ...................................13 I
System Description ................................................... 5
Component Description ............................................ 5 PREPARATION ........................................... 14
COMPONENT DIAGNOSIS .......................... 6 PREPARATION ................................................. 14 J
Special Service Tool ................................................14
B TERMINAL CIRCUIT ....................................... 6 Commercial Service Tools .......................................14
Description ................................................................ 6
K
Diagnosis Procedure ................................................. 6 ON-VEHICLE REPAIR ................................. 15
S CONNECTOR CIRCUIT ................................... 7 STARTER MOTOR ........................................... 15
Description ................................................................ 7 Removal and Installation .........................................15 L
Diagnosis Procedure ................................................. 7
SERVICE DATA AND SPECIFICATIONS
STARTING SYSTEM ........................................... 8 (SDS) ............................................................ 16
Wiring Diagram ......................................................... 8 M
STARTER MOTOR ........................................... 16
SYMPTOM DIAGNOSIS .............................. 12 Starter ......................................................................16
N

Revision: October 2008 STR-1 2009 Maxima

 DIAGNOSIS AND REPAIR WORKFLOW
< BASIC INSPECTION > [VQ35DE]

BASIC INSPECTION
DIAGNOSIS AND REPAIR WORKFLOW
Work Flow INFOID:0000000003893274

OVERALL SEQUENCE

AWBIA0755GB

DETAILED FLOW

Revision: October 2008 STR-2 2009 Maxima

 DIAGNOSIS AND REPAIR WORKFLOW
< BASIC INSPECTION > [VQ35DE]
NOTE:
To ensure a complete and thorough diagnosis, the battery, starter motor and generator test segments must be A
done as a set from start to finish.
1.DIAGNOSIS WITH MULTITASKING BATTERY DIAGNOSTIC STATION
STR
Perform the starting system test with multitasking battery diagnostic station. For details and operating instruc-
tions, refer to diagnostic station instruction manual.
Test result
C
CRANKING NORMAL>>GO TO 2
LOW VOLTAGE>>GO TO 5
CHARGE BATTERY>>Perform the slow battery charging procedure. (Initial rate of charge is 10A for 12
hours.) Perform battery test again. Refer to diagnostic station instruction manual. D
REPLACE BATTERY>>Before replacing battery, clean the battery cable clamps and battery posts. Perform
battery test again. Refer to diagnostic station instruction manual. If second test result is
“REPLACE BATTERY”, then do so. Perform battery test again to confirm repair. E
2.CRANKING CHECK
Check that the starter motor operates properly.
Does the engine crank normally? F
YES >> GO TO 3
NO >> GO TO 4
G
3.ENGINE START CHECK
Check that the engine starts.
Does the engine start? H
YES >> Starter motor is OK. Inspection end.
NO >> Perform further diagnosis of engine mechanical or engine control system. Refer to EM and EC
sections. Once resolved, perform battery test again. I
4.STARTER MOTOR ACTIVATION
Check that the starter motor operates.
J
Does the starter motor turn?
YES >> Check ring gear and starter motor drive pinion. Once resolved, perform battery test again.
NO >> GO TO 7
K
5.COMPARISON BETWEEN ENGINE COOLANT AND CRANKING VOLTAGE
Compare the engine coolant temperature and verify the cranking voltage is within specification.
Minimum Specification of Cranking Voltage Referencing Coolant Temperature
L
Engine coolant temperature [°C (°F)] Voltage [V]
−30 to −20 (−22 to −4) 8.6
M
−19 to −10 (−2 to 14) 9.1
−9 to 0 (16 to 32) 9.5
More than 1 (More than 34) 9.9 N
Is the voltage less than the specified value?
YES >> GO TO 7
NO >> GO TO 6 O
6.STARTER OPERATION
Check the starter operation. P
Does the starter motor turn smoothly?
YES >> Starter motor is OK. Inspection end.
NO >> GO TO 7
7.“B” TERMINAL CIRCUIT INSPECTION
Check “B” terminal circuit. Refer to STR-6, "Diagnosis Procedure".
Is “B” terminal circuit normal?

Revision: October 2008 STR-3 2009 Maxima

 DIAGNOSIS AND REPAIR WORKFLOW
< BASIC INSPECTION > [VQ35DE]
YES >> GO TO 8
NO >> Repair as needed.
8.“S” CONNECTOR CIRCUIT INSPECTION
Check “S” connector circuit. Refer to STR-7, "Diagnosis Procedure".
Is “S” connector circuit normal?
YES >> GO TO 9
NO >> Repair as needed.
9.ENGINE ROTATION STATUS
Check that the engine can be rotated by hand.
Does the engine turn freely by hand?
YES >> Replace starter motor. Refer to STR-15, "Removal and Installation".
NO >> Perform further diagnosis of engine mechanical or powertrain mechanism. Refer to EM, TM or CL
sections. Once resolved, perform battery test again. Refer to diagnostic station instruction man-
ual.

Revision: October 2008 STR-4 2009 Maxima

 STARTING SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]

FUNCTION DIAGNOSIS A
STARTING SYSTEM
System Diagram INFOID:0000000003893275
STR

I
AWBIA0669GB

J
System Description INFOID:0000000003893276

The starter motor plunger closes and provides a closed circuit between the battery and the starter motor. The
starter motor is grounded to the cylinder block. With power and ground supplied, the starter motor operates. K
Component Description INFOID:0000000003893277

L
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 M
position.
BCM BCM controls the starter relay inside IPDM E/R.
IPDM E/R CPU inside IPDM E/R controls the starter control relay. N
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. O

Revision: October 2008 STR-5 2009 Maxima

 B TERMINAL CIRCUIT
< COMPONENT DIAGNOSIS > [VQ35DE]

COMPONENT DIAGNOSIS
B TERMINAL CIRCUIT
Description INFOID:0000000003893278

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

Diagnosis Procedure INFOID:0000000003893279

CAUTION:
Perform diagnosis under the condition that the 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 depleted.
1.CHECK TERMINAL B POWER SUPPLY VOLTAGE
1. Turn ignition switch OFF.
2. Make sure that starter motor connector F27 terminal B connection is clean and tight.
3. Check voltage between starter motor connector F27 terminal B
and ground.

B - ground Battery voltage

Is there battery voltage present?
YES >> GO TO 2
NO >> Check harness between battery and starter motor for
open circuit.

WKIA0137E

2.CHECK BATTERY CABLE (VOLTAGE DROP TEST)

1. Shift CVT selector lever to “P” or “N” position.
2. Check voltage between battery positive terminal and starter
motor connector F27 terminal B while cranking the engine.

While cranking the engine

Terminal B - B+ terminal Less than 0.5V
Is the voltage drop less than 0.5V?
YES >> GO TO 3
NO >> Check harness between the battery and the starter
motor for high resistance.
WKIA0138E

3.CHECK GROUND CIRCUIT STATUS (VOLTAGE DROP TEST)

1. Shift CVT selector lever to “P” or “N” position.
2. Check voltage between starter motor case and battery negative
terminal while cranking the engine.

While cranking the engine

Starter case - B- terminal Less than 0.2V
Is the voltage drop less than 0.2V?
YES >> Terminal B circuit is OK. Further inspection necessary.
Refer to STR-2, "Work Flow".
NO >> Check the starter motor case to engine mounting for
high resistance. WKIA0139E

Revision: October 2008 STR-6 2009 Maxima

 S CONNECTOR CIRCUIT
< COMPONENT DIAGNOSIS > [VQ35DE]
S CONNECTOR CIRCUIT
A
Description INFOID:0000000003893280

The starter motor magnetic switch is supplied with power when the ignition switch is turned to the START posi- STR
tion while the selector lever is in the P or N position.
Diagnosis Procedure INFOID:0000000003893281

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 starter motor connector F28.
3. Shift CVT selector lever to “P” or “N” position.
4. Check voltage between starter motor harness connector F28
F
terminal S and ground with the ignition in START.

With ignition switch in START

G
S - ground Battery voltage
Is battery voltage present?
YES >> “S” circuit is OK. Further inspection necessary. Refer to ALBIA0503GB H
STR-2, "Work Flow".
NO >> GO TO 2
2.CHECK CONNECTOR I
1. Turn ignition switch OFF.
2. Check the following terminals and connectors for damage, bent pins and loose connections.
- IPDM E/R harness connector F10 J
- Starter motor harness connector F28
Is the inspection result normal?
YES >> GO TO 3 K
NO >> Repair the terminal and connector.
3.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
L
1. Disconnect the following harness connectors.
- IPDM E/R connector F10
- Starter motor connector F28
2. Check continuity between starter motor harness connector F28 M
terminal S and IPDM E/R harness connector F10 terminal 80.

S - 80 Continuity exists N
Is there proper continuity between the two pins?
YES >> Further inspection necessary. Refer to STR-2, "Work
Flow". O
ALBIA0504GB
NO >> Repair the harness.

Revision: October 2008 STR-7 2009 Maxima

 STARTING SYSTEM
< COMPONENT DIAGNOSIS > [VQ35DE]
STARTING SYSTEM
Wiring Diagram INFOID:0000000003893282

ABBWA0053GB

Revision: October 2008 STR-8 2009 Maxima

 STARTING SYSTEM
< COMPONENT DIAGNOSIS > [VQ35DE]

STR

ABBIA0151GB

Revision: October 2008 STR-9 2009 Maxima

 STARTING SYSTEM
< COMPONENT DIAGNOSIS > [VQ35DE]

ABBIA0152GB

Revision: October 2008 STR-10 2009 Maxima

 STARTING SYSTEM
< COMPONENT DIAGNOSIS > [VQ35DE]

STR

ABBIA0153GB

Revision: October 2008 STR-11 2009 Maxima

 STARTING SYSTEM
< SYMPTOM DIAGNOSIS > [VQ35DE]

SYMPTOM DIAGNOSIS
STARTING SYSTEM
Symptom Table INFOID:0000000003893284

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

Revision: October 2008 STR-12 2009 Maxima

 PRECAUTIONS
< PRECAUTION > [VQ35DE]

PRECAUTION A
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT STR
PRE-TENSIONER" INFOID:0000000003893285

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. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted. D
Information necessary to service the system safely is included in the SR and SB section of this Service Man-
ual.
WARNING: E
• 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.
F
• 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 SR section.
• Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this G
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or har-
ness connectors.
Precautions Necessary for Steering Wheel Rotation after Battery Disconnect H
INFOID:0000000004394039

NOTE:
I
• Before removing and installing any control units, first turn the push-button ignition switch to the LOCK posi-
tion, then disconnect both battery cables.
• After finishing work, confirm that all control unit connectors are connected properly, then re-connect both
battery cables. J
• Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If a DTC is detected, perform trouble diagnosis according to self-diagnosis results.
This vehicle is equipped with a push-button ignition switch and a steering lock unit. K
If the battery is disconnected or discharged, the steering wheel will lock and cannot be turned.
If turning the steering wheel is required with the battery disconnected or discharged, follow the procedure
below before starting the repair operation.
L
OPERATION PROCEDURE
1. Connect both battery cables.
NOTE: M
Supply power using jumper cables if battery is discharged.
2. Carry the Intelligent Key or insert it to the key slot and turn the push-button ignition switch to ACC position.
(At this time, the steering lock will be released.)
N
3. Disconnect both battery cables. The steering lock will remain released with both battery cables discon-
nected and the steering wheel can be turned.
4. Perform the necessary repair operation.
O
5. When the repair work is completed, re-connect both battery cables. With the brake pedal released, turn
the push-button ignition switch from ACC position to ON position, then to LOCK position. (The steering
wheel will lock when the push-button ignition switch is turned to LOCK position.)
P
6. Perform self-diagnosis check of all control units using CONSULT-III.

Revision: October 2008 STR-13 2009 Maxima

 PREPARATION
< PREPARATION > [VQ35DE]

PREPARATION
PREPARATION
Special Service Tool INFOID:0000000004687998

Tool number
(Kent Moore No.) Description
Tool name
— Tests Batteries, starting and charging system.
(—) Model GR-8 For operating instructions, refer to diagnostic
Multitasking Battery Diagnostic Sta- station instruction manual.
tion

AWIIA1239ZZ

Commercial Service Tools INFOID:0000000003893287

Tool name Description

Power tools Loosening bolts and nuts

PBIC0190E

Revision: October 2008 STR-14 2009 Maxima

 STARTER MOTOR
< ON-VEHICLE REPAIR > [VQ35DE]

ON-VEHICLE REPAIR A
STARTER MOTOR
Removal and Installation INFOID:0000000003893289
STR

REMOVAL
1. Disconnect the negative and positive battery terminals. C
2. Remove the air cleaner assembly and air ducts. Refer to EM-23, "Removal and Installation".
3. Disconnect the following:
• ECM D
• TCM
4. Remove the battery tray. Refer to PG-67, "Removal and Installation (Battery Tray)".
5. Disconnect the battery cable (A) and starter harness connector. E
6. Remove the starter bolts, then remove the starter.

AWBIA0696GB
H

INSTALLATION
Installation is in the reverse order of removal.
I

Revision: October 2008 STR-15 2009 Maxima

 STARTER MOTOR
< SERVICE DATA AND SPECIFICATIONS (SDS) [VQ35DE]

SERVICE DATA AND SPECIFICATIONS (SDS)

STARTER MOTOR
Starter INFOID:0000000003893290

Application VQ35DE
CVT model
Manufacturer Mitsubishi M000TA0072ZC
Type Reduction gear type
System voltage 12V
Terminal voltage 11V
No-load Current 90A Max.
Revolution 2,400 RPM Min.

Revision: October 2008 STR-16 2009 Maxima