Nissan Pathfinder (2011 year). Manual — 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 manual.
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 manual.
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.
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"
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 >
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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
(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 >
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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 >
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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.
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
NO
>> Check the starter motor case to engine mounting for high resistance.
2011 Pathfinder
S CONNECTOR CIRCUIT
STR-13
< DTC/CIRCUIT DIAGNOSIS >
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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
.
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
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