Nissan Quest E52. Manual - part 1191

STR-14

< DTC/CIRCUIT DIAGNOSIS >

B TERMINAL CIRCUIT

DTC/CIRCUIT DIAGNOSIS

B TERMINAL CIRCUIT

Description

INFOID:0000000009650605

The “B” terminal is constantly supplied with battery power.

Diagnosis Procedure

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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 “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 “B” terminal 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” or “N” 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 the starter motor for poor continuity.

3.

CHECK GROUND CIRCUIT STATUS (VOLTAGE DROP TEST)

1.

Shift selector lever to “P” or “N” position.

2.

Check voltage between starter motor case and battery negative terminal.

Is the inspection result normal?

YES

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

STR-9, "Work Flow (With GR8-

1200 NI)"

 or 

STR-12, "Work Flow (Without GR8-1200 NI)"

.

NO

>> Check the starter motor case and ground for poor continuity.

Terminals

Voltage (Approx.)

(+)

(–)

Starter motor “B” terminal

Terminal

F10

2 Ground

Battery 

voltage

Terminals

Condition

Voltage (Approx.)

(+)

(–)

Starter motor

“B” terminal

Terminal

Battery positive terminal

F10

2 

When the ignition switch 

is in START position

Less than

 0.5 V

Terminals

Condition

Voltage (Approx.)

(+)

(–)

Starter motor case

Battery negative terminal

When the ignition switch is in 

START position

Less than 0.2 V

S CONNECTOR CIRCUIT

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< DTC/CIRCUIT DIAGNOSIS >

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S CONNECTOR CIRCUIT

Description

INFOID:0000000009650607

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 or N position.

Diagnosis Procedure

INFOID:0000000009650608

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” or “N” position.

4.

Check voltage between starter motor harness connector and ground.

Is the inspection result normal?

YES

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

STR-9, "Work Flow (With

GR8-1200 NI)"

 or 

STR-12, "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 and IPDM E/R harness connector.

Is the inspection result normal?

YES

>> Further inspection is necessary. Refer to 

STR-9, "Work Flow (With GR8-1200 NI)"

 or 

STR-12,

"Work Flow (Without GR8-1200 NI)"

.

NO

>> Repair the harness.

terminals

Condition

Voltage (Approx.)

(+)

(–)

Starter motor har-

ness connector

Terminal

F47

1 Ground

When the ignition switch is in 

START position

Battery voltage

Starter motor harness connector

IPDM E/R harness connector

Continuity

Connector No.

Terminal No.

Connector No.

Terminal No.

F47

1

F12

80

Existed

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< SYMPTOM DIAGNOSIS >

STARTING SYSTEM

SYMPTOM DIAGNOSIS

STARTING SYSTEM

Symptom Table

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Symptom

Reference

No normal cranking

Refer to 

STR-9, "Work Flow (With GR8-1200 NI)"

 or 

STR-12, 

"Work Flow (Without GR8-1200 NI)"

.

Starter motor does not rotate

STARTER MOTOR

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< REMOVAL AND INSTALLATION >

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REMOVAL AND INSTALLATION

STARTER MOTOR

Exploded View

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REMOVAL

DISASSEMBLY

1.

Converter housing

2.

Starter motor mounting bolt

3.

“B” terminal harness

4.

“B” terminal harness nut

5.

“S” terminal harness connector

6.

Starter motor

  : Vehicle front

: N·m (kg-m, in-lb)

: N·m (kg-m, ft-lb)

JMBIA3731GB