Infiniti G37 Coupe. Manual - part 1428

WT-84

< SYMPTOM DIAGNOSIS >

LOW TIRE PRESSURE WARNING LAMP BLINKS

LOW TIRE PRESSURE WARNING LAMP BLINKS

Description

INFOID:0000000001687007

DESCRIPTION

The low tire pressure warning lamp illuminates or blinks.
However, a check is necessary because the symptom may not be caused by a system malfunction. For exam-
ple, the transmitter may not be initialized.
NOTE:
If low tire pressure warning lamp blinks below, the system is normal.

Blink Mode A

• This mode shows transmitter status is in OFF- mode.

Perform transmitter wake up operation. Refer to 

WT-5, "TRANS-

MITTER WAKE UP OPERATION : Special Repair Requirement"

.

Diagnosis Procedure

INFOID:0000000001687008

1.

CHECK TIRE PRESSURE WARNING CHECK SWITCH POWER SUPPLY

1.

Turn ignition switch “ON”.

2.

Check voltage between tire pressure warning check switch connector M23 terminal 1 and ground.

Is the reference voltage outputted?

YES

>> Repair or replace BCM circuit. Replace BCM. Refer to 

BCS-79, "Removal and Installation"

.

NO

>> GO TO 2.

2.

CHECK TIRE PRESSURE WARNING CHECK SWITCH CIRCUIT

1.

Turn ignition switch “OFF”.

2.

Disconnect BCM harness connector.

3.

Check continuity between BCM harness connector M123 terminal 149 and tire pressure warning check
switch connector M23 terminal 1.

4.

Check harness for short to ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace damaged parts.

3.

CHECK BCM

Check BCM input/output signal. Refer to 

WT-45, "Reference Value"

.

Is the inspection result normal?

YES

>> GO TO 1.

JPEIC0031GB

(+)

(-)

Voltage (Approx.)

Tire pressure warning check switch

Ground

Connector

terminal

M23

1

5.0V

BCM

Tire pressure warning check switch

Continuity

Connector

terminal

Connector

terminal

M123

149

M23

1

Existed

LOW TIRE PRESSURE WARNING LAMP BLINKS

WT-85

< SYMPTOM DIAGNOSIS >

C

D

F

G

H

I

J

K

L

M

A

B

WT

N

O

P

NO

>> GO TO 4.

4.

CHECK BCM HARNESS CONNECTOR

Check BCM pin terminals for damage or loose connection with harness connector.

Is the inspection result normal?

YES

>> Replace BCM. Refer to 

BCS-79, "Removal and Installation"

.

NO

>> repair or replace damaged parts.

WT-86

< SYMPTOM DIAGNOSIS >

TURN SIGNAL LAMP BLINKS

TURN SIGNAL LAMP BLINKS

Description

INFOID:0000000001687009

DESCRIPTION

The turn signal lamp blinks when the ignition switch is turned ON.
The BCM connector or circuit may have a malfunction.

Diagnosis Procedure

INFOID:0000000001687010

1.

CHECK TIRE PRESSURE WARNING CHECK SWITCH POWER SUPPLY

1.

Turn ignition switch “ON”.

2.

Check voltage between tire pressure warning check switch connector M23 terminal 1 and ground.

Is the reference voltage outputted?

YES

>> Repair or replace BCM circuit. Replace BCM. Refer to 

BCS-79, "Removal and Installation"

.

NO

>> GO TO 2.

2.

CHECK TIRE PRESSURE WARNING CHECK SWITCH CIRCUIT

1.

Turn ignition switch “OFF”.

2.

Disconnect BCM harness connector.

3.

Check continuity between BCM harness connector M123 terminal 149 and tire pressure warning check
switch connector M23 terminal 1. Also check harness for short to ground. 

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace damaged parts.

3.

CHECK SYMPTOM

Check again.

Does the turn signal lamp remain blinking?

YES

>> Check turn signal lamp operation. Refer to 

BCS-21, "FLASHER : CONSULT-III Function (BCM -

FLASHER)"

.

NO

>> INSPECTION END

(+)

(-)

Voltage (Approx.)

Tire pressure warning check switch

Ground

Connector

Terminal

M23

1

5 V

BCM

Tire pressure warning check switch

Continuity

Connector

Terminal

Connector

Terminal

Existed

M123

149

M23

1

ID REGISTRATION CANNOT BE COMPLETED

WT-87

< SYMPTOM DIAGNOSIS >

C

D

F

G

H

I

J

K

L

M

A

B

WT

N

O

P

ID REGISTRATION CANNOT BE COMPLETED

Description

INFOID:0000000001687011

DESCRIPTION

The ID of the transmitter installed in each wheel cannot be registered in the tire pressure monitoring system.
Inspect the transmitter or the tire pressure monitoring system circuit.

Diagnosis Procedure

INFOID:0000000001687012

1.

CHECK ID REGISTRATION

1.

Perform ID registration of all transmitter. Refer to 

WT-5, "ID REGISTRATION PROCEDURE : Special

Repair Requirement"

.

2.

Drive at a speed of 40 km/h (25 MPH) or more for 3 minutes, and then drive the vehicle at any speed for
10 minutes. Then check all tire pressures with CONSULT-III “DATA MONITOR” within 5 minutes.

Does “DATA MONITOR” displayed the standardized value without turning low tire pressure warning lamp ON?

YES

>> INSPECTION END

NO

>> GO TO 2.

2.

CHECK TRANSMITTER

1.

Perform trouble diagnosis for transmitter. Refer to 

WT-17, "Diagnosis Procedure"

.

2.

Perform ID registration of all transmitter. Refer to 

WT-5, "ID REGISTRATION PROCEDURE : Special

Repair Requirement"

.

Can ID registration of all transmitters be completed?

YES

>> INSPECTION END

NO

>> Repair or replace the malfunctioning connector. Repair or replace the malfunctioning part. GO TO

1.

Monitored item

Condition

Display value

AIR PRESS FL

Start engine and drive at 40 km/h (25 MPH) or more for 
several minutes.

Approximately equal to the indication on vehicle 
information display.

AIR PRESS FR

AIR PRESS RR

AIR PRESS RL