Nissan Pathfinder (2011 year). Instruction - part 579

STR-6

< BASIC INSPECTION >

DIAGNOSIS AND REPAIR WORKFLOW

NOTE:

To ensure a complete and thorough diagnosis, the battery, starter motor and generator test segments must be

done as a set from start to finish.

1.

DIAGNOSIS WITH MULTITASKING BATTERY DIAGNOSTIC STATION

Perform the starting system test with multitasking battery diagnostic station. For details and operating instruc-

tions, refer to diagnostic station instruction instruction.
Test result

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 instruction. 

REPLACE BATTERY>>Before replacing battery, clean the battery cable clamps and battery posts. Perform

battery test again. Refer to diagnostic station instruction instruction. If second test result is

“REPLACE BATTERY”, then do so. Perform battery test again to confirm repair.

2.

CRANKING CHECK

Check that the starter motor operates properly.
Does the engine crank normally?

YES

>> GO TO 3

NO

>> GO TO 4

3.

ENGINE START CHECK

Check that the engine starts.
Does the engine start?

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.

4.

STARTER MOTOR ACTIVATION

Check that the starter motor operates.
Does the starter motor turn?

YES

>> Check ring gear and starter motor drive pinion. Once resolved, perform battery test again.

NO

>> GO TO 7

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

Is the voltage less than the specified value?

YES

>> GO TO 7

NO

>> GO TO 6

6.

STARTER OPERATION

Check the starter operation.
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-10, "Diagnosis Procedure - VQ40DE"

 (VQ40DE) or 

STR-11, "Diagno-

sis Procedure - VK56DE"

 (VK56DE).

Engine coolant temperature [

°

C (

°

F)]

Voltage [V]

−

30 to 

−

20 (

−

22 to 

−

4)

8.6

−

19 to 

−

10 (

−

2 to 14)

9.1

−

9 to 0 (16 to 32)

9.5

More than 1 (More than 34)

9.9

2011 Pathfinder

DIAGNOSIS AND REPAIR WORKFLOW

STR-7

< BASIC INSPECTION >

C

D

E

F

G

H

I

J

K

L

M

A

STR

N

P

O

Is “B” terminal circuit normal?

YES

>> GO TO 8

NO

>> Repair as needed.

8.

“S” CONNECTOR CIRCUIT INSPECTION

Check “S” connector circuit. Refer to 

STR-13, "Diagnosis Procedure - VQ40DE"

 (VQ40DE) or 

STR-14, "Diag-

nosis Procedure - VK56DE"

 (VK56DE).

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-25, "VQ40DE : Removal and Installation"

.

NO

>> Perform further diagnosis of engine mechanical or powertrain mechanism. Refer to EM or TM

sections. Once resolved, perform battery test again. Refer to diagnostic station instruction man-

ual. 

2011 Pathfinder

STR-8

< SYSTEM DESCRIPTION >

STARTING SYSTEM

SYSTEM DESCRIPTION

STARTING SYSTEM

System Diagram

INFOID:0000000006245751

System Description

INFOID:0000000006245752

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.  

Component Parts Location

INFOID:0000000006245753

ALBIA0416GB

1.

A/T assembly F9 (with built in TCM 
F502)

2.

IPDM E/R E120, E122, E124

3.

BCM M18 (view with instrument panel 
lower LH panel removed)

AWBIA0127ZZ

2011 Pathfinder

STARTING SYSTEM

STR-9

< SYSTEM DESCRIPTION >

C

D

E

F

G

H

I

J

K

L

M

A

STR

N

P

O

Component Description

INFOID:0000000006245754

Component part

Description

TCM

TCM supplies power to the starter relay inside the IPDM E/R when 
the selector lever is shifted to the P or N position.

BCM

BCM sends a starter request signal to the CPU of the IPDM E/R 
over the CAN communication lines.

IPDM E/R

CPU inside IPDM E/R operates the starter relay at the request of 
the BCM over the CAN communication lines.

Starter motor

The starter motor plunger closes and the motor is supplied with 
battery power, which in turn cranks the engine, when the “S” ter-
minal is supplied with electric power.

2011 Pathfinder

STR-10

< DTC/CIRCUIT DIAGNOSIS >

B TERMINAL CIRCUIT

DTC/CIRCUIT DIAGNOSIS

B TERMINAL CIRCUIT

Description

INFOID:0000000006245755

For vehicles equipped with V6 engine (VQ40DE), terminal "2" (B) is constantly supplied with battery power.

For vehicles equipped with V8 engine (VK56DE), terminal "1" (B) is constantly supplied with battery power.

Diagnosis Procedure - VQ40DE

INFOID:0000000006706128

Regarding Wiring Diagram information, refer to 

STR-16, "Wiring Diagram - VQ40DE"

.

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 2 POWER SUPPLY VOLTAGE

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

and ground.

Is there battery voltage present?

YES

>> GO TO 2

NO

>> Check harness between battery and starter motor for

open circuit.

2.

CHECK BATTERY CABLE (VOLTAGE DROP TEST)

1. Shift the transmission into park or neutral.

2. Check voltage between battery positive terminal and starter

motor connector E210 terminal 2 while cranking the engine.

Is the voltage drop less than 0.2V?

YES

>> GO TO 3

NO

>> Check harness between the battery and the starter

motor for high resistance.

3.

CHECK GROUND CIRCUIT STATUS (VOLTAGE DROP TEST)

(+)

(-)

Voltage

Connector

Terminal

E210

2

Ground

Battery voltage

AWBIA0122GB

(-)

(+)

Condition

Voltage

Connector

Terminal

E210

2

Battery (+) 

terminal

While cranking the 

engine

Less than 0.2V

AWBIA0123GB

2011 Pathfinder

B TERMINAL CIRCUIT

STR-11

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

J

K

L

M

A

STR

N

P

O

Check voltage between starter motor case and battery negative ter-

minal while cranking the engine.

Is the voltage drop less than 0.2V?

YES

>> Terminal 2 circuit is OK. Further inspection necessary.

Refer to 

STR-5, "Work Flow"

.

NO

>> Check the starter motor case to engine mounting for

high resistance.

Diagnosis Procedure - VK56DE

INFOID:0000000006706129

Regarding Wiring Diagram information, refer to 

STR-20, "Wiring Diagram - VK56DE"

.

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 1 POWER SUPPLY VOLTAGE

1. Turn ignition switch OFF.

2. Make sure that starter motor connector F34 terminal 1 connection is clean and tight.

3. Check voltage between starter motor connector F34 terminal 1 and ground.

Is there battery voltage present?

YES

>> GO TO 2

NO

>> Check harness between battery and starter motor for open circuit.

2.

CHECK BATTERY CABLE (VOLTAGE DROP TEST)

1. Shift the transmission into park or neutral.

2. Check voltage between battery positive terminal and starter motor connector F34 terminal 1 while crank-

ing the engine.

Is the voltage drop less than 0.2V?

YES

>> GO TO 3

NO

>> Check harness between the battery and the starter motor for high resistance.

3.

CHECK GROUND CIRCUIT STATUS (VOLTAGE DROP TEST)

Check voltage between starter motor case and battery negative terminal while cranking the engine.

Is the voltage drop less than 0.2V?

(+)

(-)

Condition

Voltage

Starter motor 

case

Battery (-) terminal

While cranking the 

engine

Less than 0.2V

AWBIA0124GB

(+)

(-)

Voltage

Connector

Terminal

F34

1

Ground

Battery voltage

(-)

(+)

Condition

Voltage

Connector

Terminal

F34

1

Battery (+) 

terminal

While cranking the 

engine

Less than 0.2V

(+)

(-)

Condition

Voltage

Starter motor 

case

Battery (-) terminal

While cranking the 

engine

Less than 0.2V

2011 Pathfinder

STR-12

< DTC/CIRCUIT DIAGNOSIS >

B TERMINAL CIRCUIT

YES

>> Terminal 1 circuit is OK. Further inspection necessary. Refer to 

STR-5, "Work Flow"

.

NO

>> Check the starter motor case to engine mounting for high resistance.

2011 Pathfinder

S CONNECTOR CIRCUIT

STR-13

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

J

K

L

M

A

STR

N

P

O

S CONNECTOR CIRCUIT

Description

INFOID:0000000006245757

For vehicles equipped with V6 engine (VQ40DE), 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.

For vehicles equipped with V8 engine (VK56DE), terminal "2" (S) is the power supply for the starter motor

magnetic switch. Terminal 2 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 - VQ40DE

INFOID:0000000006245758

Regarding Wiring Diagram information, refer to 

STR-16, "Wiring Diagram - VQ40DE"

.

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.

Is battery voltage present?

YES

>> Magnetic switch circuit is OK. Further inspection necessary. Refer to 

STR-5, "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.

2. Check continuity between starter motor harness connector E207

(A) terminal 1 and IPDM E/R harness connector E120 (B) termi-

nal 19.

3. Check continuity between starter motor harness connector E207

(A) terminal 1 and ground.

(+)

(-)

Condition

Voltage

Connector

Terminal

E207

1

Ground

While cranking the 

engine

Battery voltage

AWBIA0343ZZ

Starter motor

IPDM E/R

Continuity

Connector

Terminal

Connector

Terminal

E207 (A)

1

E120 (B)

19

Yes

AWBIA0344ZZ

2011 Pathfinder