ENGINE

SECTION
STARTING SYSTEM
STR STR

E
CONTENTS
PRECAUTION ............................................... 2 COMPONENT DIAGNOSIS .......................... 9 F

PRECAUTIONS ................................................... 2 B TERMINAL CIRCUIT ...................................... 9

Precaution for Supplemental Restraint System Description ................................................................ 9 G
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- Diagnosis Procedure ................................................ 9
SIONER" ................................................................... 2
Precaution for Power Generation Variable Voltage S CONNECTOR CIRCUIT ................................. 10
Description ...............................................................10 H
Control System .......................................................... 2
Diagnosis Procedure ...............................................10
PREPARATION ............................................ 3
STARTING SYSTEM ......................................... 11 I
PREPARATION ................................................... 3 Wiring Diagram ........................................................11
Special Service Tool ................................................. 3
Commercial Service Tool .......................................... 3 SYMPTOM DIAGNOSIS .............................. 16
J
BASIC INSPECTION .................................... 4 STARTING SYSTEM ......................................... 16
Symptom Table .......................................................16
DIAGNOSIS AND REPAIR WORKFLOW .......... 4 K
Work Flow ................................................................. 4 ON-VEHICLE REPAIR ................................. 17

FUNCTION DIAGNOSIS ............................... 7 STARTER MOTOR ........................................... 17

Removal and Installation .........................................17 L
STARTING SYSTEM ........................................... 7
System Diagram ........................................................ 7 SERVICE DATA AND SPECIFICATIONS
System Description ................................................... 7 (SDS) ............................................................ 19
M
Component Parts Location ........................................ 7
Component Description ............................................ 8 STARTER MOTOR ........................................... 19
Starter ......................................................................19
N

STR-1
 PRECAUTIONS
< PRECAUTION >
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER" INFOID:0000000001281952

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. 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.
Information necessary to service the system safely is included in the SR and SB section of this Service Man-
ual.
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 SR section.
• 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.
Precaution for Power Generation Variable Voltage Control System INFOID:0000000001303477

CAUTION:
For this model, the battery current sensor that is installed to the negative battery cable measures the
charging/discharging current of the battery and performs various engine controls. If an electrical com-
ponent is connected directly to the negative battery terminal, the current flowing through that compo-
nent will not be measured by the battery current sensor. This condition may cause a malfunction of
the engine control system and battery discharge may occur. Do not connect an electrical component
or ground wire directly to the battery terminal.

STR-2
 PREPARATION
< PREPARATION >
PREPARATION A
PREPARATION
Special Service Tool INFOID:0000000001281953
STR

Tool number
(Kent Moore No.) Description C
Tool name
— Tests Battery.
(J-48087) For operating instructions, refer to Technical D
Battery Service Center Service Bulletin and Battery Service Center
User Guide.

WKIA5280E

— Tests starting and charging systems. F

(J-44373) Model 620 For operating instructions, refer to Technical
Starting/Charging system tester Service Bulletin.
G

SEL403X
H

J
Commercial Service Tool INFOID:0000000001281954

K
Tool name Description
Power tool Loosening bolts and nuts

PBIC0190E

STR-3
 DIAGNOSIS AND REPAIR WORKFLOW
< BASIC INSPECTION >
BASIC INSPECTION
DIAGNOSIS AND REPAIR WORKFLOW
Work Flow INFOID:0000000001714428

OVERALL SEQUENCE

ALBIA0417GB

DETAILED FLOW

STR-4
 DIAGNOSIS AND REPAIR WORKFLOW
< BASIC INSPECTION >
NOTE:
To ensure a complete and thorough diagnosis, the battery, starter motor and alternator test segments must be A
done as a set from start to finish.
1.DIAGNOSIS WITH STARTING/CHARGING SYSTEM TESTER
STR
Perform the starting system test with Starting/Charging System Tester (J-44373). For details and operating
instructions, refer to Technical Service Bulletin.
Test result
C
CRANKING VOLTAGE NORMAL>>GO TO 2
CRANKING VOLTAGE LOW>>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 Technical Service Bulletin. D
REPLACE BATTERY>>Before replacing battery, clean the battery cable clamps and battery posts. Perform
battery test again. Refer to Technical Service Bulletin. If second test result is “REPLACE BAT-
TERY”, 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-9, "Diagnosis Procedure".
Is “B” terminal circuit normal?

STR-5
 DIAGNOSIS AND REPAIR WORKFLOW
< BASIC INSPECTION >
YES >> GO TO 8
NO >> Repair as needed.
8.“S” CONNECTOR CIRCUIT INSPECTION
Check “S” connector circuit. Refer to STR-10, "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.
NO >> Perform further diagnosis of engine mechanical or powertrain mechanism. Refer to EM or TM
sections. Once resolved, perform battery test again. Refer to Technical Service Bulletin.

STR-6
 STARTING SYSTEM
< FUNCTION DIAGNOSIS >
FUNCTION DIAGNOSIS A
STARTING SYSTEM
System Diagram INFOID:0000000001714429
STR

I
ALBIA0416GB

J
System Description INFOID:0000000001714430

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 Parts Location INFOID:0000000001714431

AWBIA0127ZZ O

1. A/T assembly F9 (with built in TCM 2. IPDM E/R E119, E120, E122, E124 3. BCM M18 (view with instrument panel
F502) lower LH panel removed)
P

STR-7
 STARTING SYSTEM
< FUNCTION DIAGNOSIS >
Component Description INFOID:0000000001714432

Component part Description

TCM supplies power to the starter relay inside the IPDM E/R
TCM
when the selector lever is shifted to the P or N position.
BCM sends a starter request signal to the CPU of the IPDM E/R
BCM
over the CAN communication lines.
CPU inside IPDM E/R operates the starter relay at the request of
IPDM E/R
the BCM over the CAN communication lines.
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-8
 B TERMINAL CIRCUIT
< COMPONENT DIAGNOSIS >
COMPONENT DIAGNOSIS A
B TERMINAL CIRCUIT
Description INFOID:0000000001714433
STR
Terminal "2" (B) is constantly supplied with battery power.
Diagnosis Procedure INFOID:0000000001714434 C

CAUTION:
Perform diagnosis under the condition that the 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 depleted.
1.CHECK TERMINAL 2 POWER SUPPLY VOLTAGE E
1. Turn ignition switch OFF.
2. Make sure that starter motor connector E210 terminal 2 connection is clean and tight.
3. Check voltage between starter motor connector E210 terminal 2
F
and ground.

(+)
(-) Voltage G
Connector Terminal
E210 2 Ground Battery voltage
Is there battery voltage present? H
YES >> GO TO 2
NO >> Check harness between battery and starter motor for
AWBIA0122GB
open circuit. I
2.CHECK BATTERY CABLE (VOLTAGE DROP TEST)
1. Shift the transmission into park or neutral. J
2. Check voltage between battery positive terminal and starter
motor connector E210 terminal 2 while cranking the engine.

K
(+)
(-) Condition Voltage
Connector Terminal
Battery (+) While cranking the L
E210 2 Less than 0.2V
terminal engine
Is the voltage drop less than 0.2V?
YES >> GO TO 3 M
NO >> Check harness between the battery and the starter ALBIA0471GB

motor for high resistance.

3.CHECK GROUND CIRCUIT STATUS (VOLTAGE DROP TEST) N
Check voltage between starter motor case and battery negative ter-
minal while cranking the engine.
O
(+) (-) Condition Voltage
Starter motor While cranking the
Battery (-) terminal Less than 0.2V P
case engine
Is the voltage drop less than 0.2V?
YES >> Terminal 2 circuit is OK. Further inspection necessary.
Refer to STR-4, "Work Flow".
NO >> Check the starter motor case to engine mounting for AWBIA0124GB

high resistance.

STR-9
 S CONNECTOR CIRCUIT
< COMPONENT DIAGNOSIS >
S CONNECTOR CIRCUIT
Description INFOID:0000000001714435

Terminal "1" (S) is the power supply for the starter motor magnetic switch. Terminal 1 is supplied with power
when the ignition switch is turned to the START position while the selector lever is in the P or N position.
Diagnosis Procedure INFOID:0000000001714436

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 STARTER MOTOR MAGNETIC SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect starter motor connector E207.
3. Shift transmission into park or neutral.
4. Check voltage between starter motor harness connector E207
terminal 1 and ground with the ignition in START.

(+)
(-) Condition Voltage
Connector Terminal
While cranking the
E207 1 Ground Battery voltage
engine
AWBIA0125GB

Is battery voltage present?

YES >> Magnetic switch circuit is OK. Further inspection necessary. Refer to STR-4, "Work Flow".
NO >> GO TO 2
2.CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Check the IPDM E/R harness connector E120 and starter motor harness connector E207 for damage,
bent pins and loose connections.
Is the inspection result normal?
YES >> GO TO 3
NO >> Repair the terminal and connector.
3.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
1. Disconnect IPDM E/R connector E120 and starter motor con-
nector E207.
2. Check continuity between starter motor harness connector E207
(A) terminal 1 and IPDM E/R harness connector E120 (B) termi-
nal 19.

A B
Continiuty
Connector Terminal Connector Terminal
E207 1 E120 19 Yes
3. Check continuity between starter motor harness connector E207 AWBIA0126GB

(A) terminal 1 and ground.

A
— Continiuty
Connector Terminal
E207 1 Ground No
Are the continuity test results as specified?
YES >> Further inspection necessary. Refer to STR-4, "Work Flow".
NO >> Repair the harness.
STR-10
 STARTING SYSTEM
< COMPONENT DIAGNOSIS >
STARTING SYSTEM
A
Wiring Diagram INFOID:0000000001714437

STR

P
ALBWA0165GB

STR-11
 STARTING SYSTEM
< COMPONENT DIAGNOSIS >

ALBIA0419GB

STR-12
 STARTING SYSTEM
< COMPONENT DIAGNOSIS >

STR

ALBIA0420GB

STR-13
 STARTING SYSTEM
< COMPONENT DIAGNOSIS >

ALBIA0421GB

STR-14
 STARTING SYSTEM
< COMPONENT DIAGNOSIS >

STR

ALBIA0422GB

STR-15
 STARTING SYSTEM
< SYMPTOM DIAGNOSIS >
SYMPTOM DIAGNOSIS
STARTING SYSTEM
Symptom Table INFOID:0000000001714438

Symptom Reference
No normal cranking
Refer to STR-4, "Work Flow".
Starter motor does not rotate

STR-16
 STARTER MOTOR
< ON-VEHICLE REPAIR >
ON-VEHICLE REPAIR A
STARTER MOTOR
Removal and Installation INFOID:0000000001282715
STR

VQ40DE MODELS
C

WKIA3190E

L
1. Starter cover 2. Starter motor assembly 3. Starter cover plate (rear)
4. Transmission housing

Removal M
1. Disconnect the negative battery terminal.
2. Remove engine undercover, using power tools.
3. Remove exhaust manifold cover from exhaust manifold (right bank) to gain access to starter cover bolts. N
Refer to EM-31, "Removal and Installation".
4. Remove starter cover bolts and starter cover.
O
5. Disconnect terminal "1" connector and terminal "2" nut.
6. Remove the two starter bolts, using power tools.
7. Remove the starter.
P

WKIA3189E

STR-17
 STARTER MOTOR
< ON-VEHICLE REPAIR >
Installation
Installation is in the reverse order of removal.

Terminal "2" nut : 10.8 N·m (1.1 kg-m, 8 ft-lb)

CAUTION:
Tighten terminal "2" nut carefully.

VK56DE MODELS
Removal
1. Remove the intake manifold. Refer to EM-166, "Removal and Installation".
2. Disconnect terminal "1" connector and terminal "2" nut.
3. Remove the two starter bolts, using power tools.
4. Remove the starter.

WKIA1388E

Installation
Installation is in the reverse order of removal.

Terminal "2" nut : 10.8 N·m (1.1 kg-m, 8 ft-lb)

CAUTION:
Tighten terminal "2" nut carefully.

STR-18
 STARTER MOTOR
< SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS) A
STARTER MOTOR
Starter INFOID:0000000001283042
STR

Application VQ40DE VK56DE

C
Mitsubishi
Manufacturer
M002T85571ZCKD
Type Reduction gear type
D
System voltage 12V
Terminal voltage 11V
No-load Current Less than 120A Less than 145A E
Revolution More than 3,100 rpm More than 3,300 rpm

STR-19