Nissan Frontier. Manual - part 1192

 

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Nissan Frontier. Manual - part 1192

 

 

STR-16

< SYSTEM DESCRIPTION >

STARTING SYSTEM

M/T WITHOUT CLUTCH INTERLOCK CANCEL SYSTEM : Component Description

INFOID:0000000009482295

Component part

Description

Clutch interlock switch

Clutch interlock switch supplies power to the coil side of the starter 
relay when the clutch pedal is depressed to crank the engine.

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.

B TERMINAL CIRCUIT

STR-17

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

J

K

L

M

A

STR

N

P

O

DTC/CIRCUIT DIAGNOSIS

B TERMINAL CIRCUIT

Description

INFOID:0000000009482296

Terminal “B” is constantly supplied with battery power.

Diagnosis Procedure

INFOID:0000000009482297

Regarding Wiring Diagram information, refer to 

STR-20, "Wiring Diagram - VQ40DE With Clutch Interlock

Cancel System"

STR-26, "Wiring Diagram - VQ40DE Without Clutch Interlock Cancel System"

 or 

STR-30,

"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 released.

1.

CHECK “B” TERMINAL CIRCUIT

1. Turn ignition switch OFF.

2. Check that starter motor B” terminal connection is clean and tight.

3. Check voltage between starter motor connector E210 and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

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

2.

CHECK BATTERY CABLE CONNECTION STATUS (VOLTAGE DROP TEST)

1. Shift selector lever to P (Park) or N (Neutral) position.

2. Check voltage between battery positive terminal and starter motor B terminal.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Check harness between the battery and starter motor for continuity.

3.

CHECK GROUND CIRCUIT STATUS (VOLTAGE DROP TEST)

1. Shift selector lever to P (Pack) or N (Neutral) position.

2. Check voltage between starter motor case and battery negative terminal.

Is the inspection result normal?

Terminals

Voltage 

(Approx.)

(+)

(-)

Starter motor “B” terminal

Terminal

E210

2

Ground

Battery voltage

Terminals

Condition

Voltage 

(Approx.)

(+)

(-)

Starter motor 

“B“ terminal

Terminal

Battery positive terminal

E210

2

When the ignition switch is in START position

Less than 0.5V

Terminals

Condition

Voltage 

(Approx.)

(+)

(-)

Starter motor case

Battery negative terminal

When the ignition switch is in 

START position

Less than 0.2V

STR-18

< DTC/CIRCUIT DIAGNOSIS >

B TERMINAL CIRCUIT

YES

>> “B” terminal circuit is OK. Further inspection is necessary. Refer to 

STR-6, "Work Flow (With GR8-

1200 NI)"

 or 

STR-10, "Work Flow (Without GR8-1200 NI)"

.

NO

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

S CONNECTOR CIRCUIT

STR-19

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

J

K

L

M

A

STR

N

P

O

S CONNECTOR CIRCUIT

Description

INFOID:0000000009482298

The starter motor magnetic switch is supplied with power when the ignition switch is turned to the START posi-

tion while the selector lever is in the P (Park) or N (Neutral) position.

Diagnosis Procedure

INFOID:0000000009482299

Regarding Wiring Diagram information, refer to 

STR-20, "Wiring Diagram - VQ40DE With Clutch Interlock

Cancel System"

STR-26, "Wiring Diagram - VQ40DE Without Clutch Interlock Cancel System"

 or 

STR-30,

"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 “S” CONNECTOR CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect starter motor connector.

3. Shift selector lever to “P” (Park) or “N” (Neutral) position.

4. Check voltage between starter motor harness connector E211 (QR25DE) or E207 (VQ40DE) and ground.

Is the inspection result normal?

YES

>> “S” circuit is OK. Further inspection is necessary. Refer to 

STR-6, "Work Flow (With GR8-1200

NI)"

 or 

STR-10, "Work Flow (Without GR8-1200 NI)"

.

NO

>> GO TO 2.

2.

CHECK HARNESS CONTINUITY (OPEN CIRCUIT) 

1. Disconnect IPDM E/R connector.

2. Check continuity between starter motor harness connector E211 (QR25DE) or E207 (VQ40DE) and the

IPDM E/R harness connector E120.

Is the inspection result normal?

YES

>> Further inspection is necessary. Refer to 

STR-6, "Work Flow (With GR8-1200 NI)"

 or 

STR-10,

"Work Flow (Without GR8-1200 NI)"

.

NO

>> Repair or replace the harness or connectors.

(+)

(-)

Condition 

Voltage 

(Approx.)

Connector Terminal 

E211 (QR25DE)

1

Ground 

When the ignition switch is in START position

Battery voltage

E207 (VQ40DE)

Starter motor harness connector 

IPDM E/R harness connector

Continuity 

Connector

Terminal

Connector

Terminal

E211 (QR25DE)

1

E120

19

Yes

E207 (VQ40DE)

 

 

 

 

 

 

 

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