Infiniti G37 Coupe. Manual - part 975

PCS

POWER SUPPLY AND GROUND CIRCUIT

PCS-69

< COMPONENT DIAGNOSIS >

[POWER DISTRIBUTION SYSTEM]

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POWER SUPPLY AND GROUND CIRCUIT

BCM

BCM : Diagnosis Procedure

INFOID:0000000001728210

1.

CHECK FUSE AND FUSIBLE LINK

Check that the following fuse and fusible link are not blown.

Is the fuse fusing?

YES

>> Replace the blown fuse or fusible link after repairing the affected circuit if a fuse or fusible link is

blown.

NO

>> GO TO 2.

2.

CHECK POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect BCM connectors.

3.

Check voltage between BCM harness connector and ground.

Is the measurement value normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK GROUND CIRCUIT

Check continuity between BCM harness connector and ground.

Does continuity exist?

YES

>> INSPECTION END

NO

>> Repair harness or connector.

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM) : Di-
agnosis Procedure

INFOID:0000000001728211

1.

CHECK FUSES AND FUSIBLE LINK

Check that the following IPDM E/R fuses or fusible links are not blown.

Signal name

Fuse and fusible link No.

Battery power supply

K

10

Terminals

Voltage

(Approx.)

(+)

(

−

)

BCM

Ground

Connector

Terminal

M118

1

Battery voltage

M119

11

BCM

Ground

Continuity

Connector

Terminal

M119

13

Existed

PCS-70

< COMPONENT DIAGNOSIS >

[POWER DISTRIBUTION SYSTEM]

POWER SUPPLY AND GROUND CIRCUIT

Is the fuse fusing?

YES

>> Replace the blown fuse or fusible link after repairing the affected circuit if a fuse or fusible link is

blown.

NO

>> GO TO 2.

2.

CHECK POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect IPDM E/R connector.

3.

Check voltage between IPDM E/R harness connector and ground.

Is the measurement value normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK GROUND CIRCUIT

Check continuity between IPDM E/R harness connectors and ground.

Does continuity exist?

YES

>> INSPECTION END

NO

>> Repair harness or connector.

Signal name

Fuses and fusible link No.

Battery power supply

C

50

51

Terminals

Voltage

(Approx.)

(+)

(

−

)

IPDM E/R

Connector

Terminal

Ground

E4

1

Battery voltage

2

IPDM E/R

Ground

Continuity

Connector

Terminal

E5

12

Existed

E6

41

PCS

PUSH-BUTTON IGNITION SWITCH

PCS-71

< COMPONENT DIAGNOSIS >

[POWER DISTRIBUTION SYSTEM]

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PUSH-BUTTON IGNITION SWITCH

Description

INFOID:0000000001728214

BCM transmits the change in the power supply position with the push-button ignition switch to IPDM E/R via
the CAN communication line. IPDM E/R transmits the power supply position status via CAN communication
line to BCM.

Component Function Check

INFOID:0000000001728213

1.

CHECK FUNCTION

1.

Select “PUSH SW” in “Data Monitor” mode with CONSULT-III. 

2.

Check the push-button ignition switch signal under the following condition.

Is the indication normal?

YES

>> INSPECTION END.

NO

>> Go to  

PCS-71, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000001728212

1.

CHECK PUSH-BUTTON IGNITION SWITCH OPERATION

Press push-button ignition switch and check if it turns to ON.
Does ignition switch turn to ON?

YES

>> GO TO 2.

NO

>> GO TO 4.

2.

CHECK IGNITION SWITCH OUTPUT SIGNAL (IPDM E/R)

1.

Disconnect push-button ignition switch harness connector.

2.

Check voltage between IPDM E/R harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Replace IPDM E/R. Refer to 

PCS-34, "Removal and Installation"

.

3.

CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT (IPDM E/R)

1.

Disconnect IPDM E/R harness connector E5 and BCM harness connector M122.

2.

Check continuity between IPDM E/R harness connector and push-button ignition switch harness connec-
tor.

3.

Check continuity between IPDM E/R harness connector and ground.

Is the inspection result normal?

Test item

Condition

Status

PUSH SW

Push-button ignition switch is pressed

ON

Push-button ignition switch is not pressed

OFF

IPDM E/R

Ground

Voltage (V)

Connector

Terminal

E5

28

Ground

Battery voltage

IPDM E/R

Push-button ignition switch

Continuity

Connector

Terminal

Connector

Terminal

E5

28

M50

4

Existed

IPDM E/R

Ground

Continuity

Connector

Terminal

E5

28

Ground

Not existed

PCS-72

< COMPONENT DIAGNOSIS >

[POWER DISTRIBUTION SYSTEM]

PUSH-BUTTON IGNITION SWITCH

YES

>> GO TO 6.

NO

>> Repair harness or connector.

4.

CHECK IGNITION SWITCH OUTPUT SIGNAL (BCM)

1.

Disconnect push-button ignition switch harness connector.

2.

Check voltage between BCM harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace BCM. Refer to 

BCS-79, "Removal and Installation"

.

5.

CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT (BCM)

1.

Disconnect BCM harness connector and IPDM E/R harness connector.

2.

Check continuity between BCM harness connector and push-button ignition switch harness connector.

3.

Check continuity between BCM harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair harness or connector.

6.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-38, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000001728216

1.

CHECK PUSH-BUTTON IGNITION SWITCH

1.

Turn ignition switch OFF.

2.

Disconnect push-button ignition switch connector.

3.

Check continuity between push-button ignition switch terminals under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END.

NO

>> Replace push-button ignition switch.

BCM

Ground

Voltage (V)

Connector

Terminal

M122

89

Ground

Battery voltage

BCM

Push-button ignition switch

Continuity

Connector

Terminal

Connector

Terminal

M122

89

M50

4

Existed

BCM

Ground

Continuity

Connector

Terminal

M122

89

Ground

Not existed

Push-button ignition switch

Condition

Continuity

Connector

Terminal

M50

1

4

Pressed

Existed

Not pressed

Not existed