Infiniti G37 Coupe. Manual - part 346

 

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Infiniti G37 Coupe. Manual - part 346

 

 

DEF-8

< FUNCTION DIAGNOSIS >

DIAGNOSIS SYSTEM (BCM)

• Vehicle Condition (BCM detected condition)

IGN Counter

IGN counter indicates the number of times that ignition switch is turned ON after DTC is detected.
• The number is 0 when a malfunction is detected now.
• The number increases like 1 

 2 

 3...38 

 39 after returning to the normal condition whenever ignition

switch OFF 

 ON.

• The number is fixed to 39 until the self-diagnosis results are erased if it is over 39.

REAR WINDOW DEFOGGER

REAR WINDOW DEFOGGER : CONSULT-III Function (BCM - REAR DEFOGGER)

INFOID:0000000001696763

Data monitor

ACTIVE TEST

CONSULT screen terms

Description

SLEEP>LOCK

While turning BCM status from low power consumption mode to normal mode (Power supply 
position is “LOCK”)

SLEEP>OFF

While turning BCM status from low power consumption mode to normal mode (Power supply 
position is “OFF”.)

LOCK>ACC

While turning power supply position from “LOCK” to “ACC”

ACC>ON

While turning power supply position from “ACC” to “IGN”

RUN>ACC

While turning power supply position from “RUN” to “ACC” (Vehicle is stopping and selector 
lever is except P position.)

CRANK>RUN

While turning power supply position from “CRANKING” to “RUN” (From cranking up the en-
gine to run it)

RUN>URGENT

While turning power supply position from “RUN“ to “ACC” (Emergency stop operation)

ACC>OFF

While turning power supply position from “ACC” to “OFF”

OFF>LOCK

While turning power supply position from “OFF” to “LOCK”

OFF>ACC

While turning power supply position from “OFF” to “ACC”

ON>CRANK

While turning power supply position from “IGN” to “CRANKING”

OFF>SLEEP

While turning BCM status from normal mode (Power supply position is “OFF”.) to low power 
consumption mode

LOCK>SLEEP

While turning BCM status from normal mode (Power supply position is “LOCK”.) to low pow-
er consumption mode

LOCK

Power supply position is “LOCK” (Ignition switch OFF with steering is locked.)

OFF

Power supply position is “OFF” (Ignition switch OFF with steering is unlocked.)

ACC

Power supply position is “ACC” (Ignition switch ACC)

ON

Power supply position is “IGN” (Ignition switch ON with engine stopped)

ENGINE RUN

Power supply position is “RUN” (Ignition switch ON with engine running)

CRANKING

Power supply position is “CRANKING” (At engine cranking)

Monitor Item

Description

REAR DEF SW

This is displayed even when it is not equipped.

PUSH SW

Indicates [ON/OFF] condition of push switch.

Test Item

Description

REAR DEFOGGER

This test is able to check rear window defogger operation. Rear window defogger operates when 
“ON” on CONSULT-III screen is touched.

POWER SUPPLY AND GROUND CIRCUIT

DEF-9

< COMPONENT DIAGNOSIS >

C

D

E

F

G

H

I

J

K

M

A

B

DEF

N

O

P

COMPONENT DIAGNOSIS

POWER SUPPLY AND GROUND CIRCUIT

Diagnosis Procedure

INFOID:0000000001713822

1.

CHECK FUSE AND FUSIBLE LINK

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

Is the fuse blown?

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.

Terminal No.

Signal name

Fuse and fusible link No.

1

Battery power supply

K

11

10

Terminals

Voltage

(Approx.)

(+)

(

)

BCM

Ground

Connector

Terminal

M118

1

Battery voltage

M119

11

BCM

Ground

Continuity

Connector

Terminal

M119

13

Existed

DEF-10

< COMPONENT DIAGNOSIS >

REAR WINDOW DEFOGGER SWITCH

REAR WINDOW DEFOGGER SWITCH

Description

INFOID:0000000001696764

• The rear window defogger is operated by turning the rear window defogger switch ON.
• The indicator lamp in the rear window defogger illuminates when the rear window defogger is operating.

Component Function Check

INFOID:0000000001696765

1.

CHECK REAR WINDOW DEFOGGER SWITCH FUNCTION

Check (“REAR DEF SW”) in DATA MONITOR mode with CONSULT-III. Refer to 

DEF-8, "REAR WINDOW

DEFOGGER : CONSULT-III Function (BCM - REAR DEFOGGER)"

Is the inspection result normal?

YES

>> Rear window defogger switch function is OK.

NO

>> Refer to 

DEF-10, "Diagnosis Procedure"

Diagnosis Procedure

INFOID:0000000001696766

1.

CHECK MULTIFUNCTION SWITCH (REAR WINDOW DEFOGGER SWITCH)

Does multifunction switch operate normally?
Base audio without navigation. Refer to 

AV-19, "Diagnosis Description"

Bose audio without navigation. Refer to 

AV-136, "Diagnosis Description"

Bose audio with navigation. Refer to 

AV-388, "Diagnosis Description"

Is the inspection result normal?

YES

>> INSPECTION END.

NO

>> Replace multifunction switch (rear window defogger switch). Refer to

AV-117, "Removal and Instal-

lation"

When rear defogger switch is turned to ON

REAR DEF SW

:ON

REAR WINDOW DEFOGGER RELAY

DEF-11

< COMPONENT DIAGNOSIS >

C

D

E

F

G

H

I

J

K

M

A

B

DEF

N

O

P

REAR WINDOW DEFOGGER RELAY

Description

INFOID:0000000001696767

Power is supplied to the rear window defogger with BCM control.

Component Function Check

INFOID:0000000001696768

1.

CHECK REAR WINDOW DEFOGGER RELAY POWER SUPPLY CIRCUIT

1.

Perform Active Test (“REAR DEFOGGER”) with CONSULT-III.

2.

Touch “ON”.

3.

Check that the rear window heating wire is getting warmer.

Is the inspection result normal?

YES

>> Rear window defogger relay power supply circuit is OK.

NO

>> Refer to 

DEF-11, "Diagnosis Procedure"

Diagnosis Procedure

INFOID:0000000001696769

1.

CHECK FUSE

1.

Turn ignition switch off.

2.

Check the following.

-

10A fuse (No.3, located in fuse block (J/B))

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace the blown fuse after repairing the affected circuit if a fuse is blown.

2.

CHECK REAR WINDOW DEFOGGER CIRCUIT 1

1.

Turn ignition switch ON.

2.

Check voltage between BCM harness connector and ground.

Is the inspection result normal?

YES

>> Rear window defogger power supply circuit is OK.

NO

>> GO TO 3.

3.

CHECK REAR WINDOW DEFOGGER CIRCUIT 2

1.

Turn ignition switch OFF.

2.

Disconnect BCM connector and rear window defogger relay.

3.

Check continuity between BCM harness connector and fuse block (J/B) harness connector.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace harness.

4.

CHECK REAR WINDOW DEFOGGER RELAY

Check rear window defogger relay.
Refer to 

DEF-12, "Component Inspection"

Is the inspection result normal?

YES

>> GO TO 5.

BCM

Ground

Condition of rear window defog-

ger switch

Voltage (V)

(Approx.)

 Connector

Terminal 

M123

151

Ground

ON 0

OFF

Battery voltage

BCM 

Fuse block (J/B)

Continuity 

Connector

Terminal

Connector

Terminal

M123

151

M2

4B

Existed

 

 

 

 

 

 

 

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