Nissan Frontier D40. Manual - part 1020

B TERMINAL CIRCUIT

STR-13

< COMPONENT DIAGNOSIS >

C

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A

STR

N

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COMPONENT DIAGNOSIS

B TERMINAL CIRCUIT

Description

INFOID:0000000005276063

Terminal "2" (B) is constantly supplied with battery power.

Diagnosis Procedure

INFOID:0000000005276064

Regarding Wiring Diagram information, refer to 

STR-18, "Wiring Diagram - VQ40DE - With Clutch Interlock

Cancel Switch"

, 

STR-24, "Wiring Diagram - VQ40DE - Without Clutch Interlock Cancel Switch"

 or 

STR-28,

"Wiring Diagram - QR25DE"

.

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

STR-14

< COMPONENT DIAGNOSIS >

B TERMINAL CIRCUIT

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.

(+)

(-)

Condition

Voltage

Starter motor 

case

Battery (-) terminal

While cranking the 

engine

Less than 0.2V

AWBIA0124GB

S CONNECTOR CIRCUIT

STR-15

< COMPONENT DIAGNOSIS >

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S CONNECTOR CIRCUIT

QR25DE

QR25DE : Description

INFOID:0000000005276065

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.

QR25DE : Diagnosis Procedure

INFOID:0000000005276066

Regarding Wiring Diagram information, refer to 

STR-28, "Wiring Diagram - QR25DE"

.

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 E211.

3.

Shift transmission into park or neutral.

4.

Check voltage between starter motor harness connector E211
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 E211 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 E211.

2.

Check continuity between starter motor harness connector E211
(A) terminal 1 and IPDM E/R harness connector E120 (B) termi-
nal 19.

3.

Check continuity between starter motor harness connector E211
(A) terminal 1 and ground.

(+)

(-)

Condition

Voltage

Connector

Terminal

E211

1

Ground

While cranking the 

engine

Battery voltage

AWBIA0437ZZ

A

B

Continuity

Connector

Terminal

Connector

Terminal

E211

1

E120

19

Yes

AWBIA0438ZZ

STR-16

< COMPONENT DIAGNOSIS >

S CONNECTOR CIRCUIT

Are the continuity test results as specified?

YES

>> Further inspection necessary. Refer to 

STR-5, "Work Flow"

.

NO

>> Repair the harness.

VQ40DE

VQ40DE : Description

INFOID:0000000005276067

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.

VQ40DE : Diagnosis Procedure

INFOID:0000000005276068

Regarding Wiring Diagram information, refer to 

STR-18, "Wiring Diagram - VQ40DE - With Clutch Interlock

Cancel Switch"

 or 

STR-24, "Wiring Diagram - VQ40DE - Without Clutch Interlock Cancel Switch"

.

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)

A

—

Continuity

Connector

Terminal

E211

1

Ground

No

(+)

(-)

Condition

Voltage

Connector

Terminal

E207

1

Ground

While cranking the 

engine

Battery voltage

AWBIA0343ZZ