Infiniti QX56 (JA60). Manual - part 1027

WT-36

< SYMPTOM DIAGNOSIS >

TPMS

SYMPTOM DIAGNOSIS

TPMS

Symptom Table

INFOID:0000000005148234

Symptom

Reference

Low tire pressure warning lamp does not come on when ignition switch is turned ON.

WT-37

Low tire pressure warning lamp stays on when ignition switch is turned ON.

WT-38

Low tire pressure warning lamp flashes when ignition switch is turned ON.

WT-39

Hazard warning lamps flash when ignition switch is turned ON.

WT-40

Tire pressure information in display unit does not exist.

WT-42

ID registration cannot be completed.

WT-42

LOW TIRE PRESSURE WARNING LAMP DOES NOT TURN ON

WT-37

< SYMPTOM DIAGNOSIS >

C

D

F

G

H

I

J

K

L

M

A

B

WT

N

O

P

LOW TIRE PRESSURE WARNING LAMP DOES NOT TURN ON

Low Tire Pressure Warning Lamp Does Not Come On When Ignition Switch Is Turned 
On

INFOID:0000000005148235

DIAGNOSTIC PROCEDURE

1.

SELF-DIAGNOSTIC RESULT CHECK

Using CONSULT-III, check display contents of BCM in SELF-DIAGNOSIS.
Is "CAN COMM CIRCUIT" displayed in the self-diagnosis display items?

YES

>>  Malfunction in CAN communication system.

NO

>> GO TO 2

2.

CHECK COMBINATION METER

Check combination meter operation.  Refer to 

MWI-23, "CONSULT-III Function (METER/M&A)"

.

Is the inspection result normal?

YES

>> GO TO 3

NO

>> Replace combination meter. Refer to 

MWI-100, "Removal and Installation"

.

3.

CHECK LOW TIRE PRESSURE WARNING LAMP

Disconnect BCM harness connector. 
Does the low tire pressure warning lamp activate?

YES

>> Replace BCM. Refer to 

BCS-59, "Removal and Installation"

.

NO

>> Check combination meter operation.

WT-38

< SYMPTOM DIAGNOSIS >

LOW TIRE PRESSURE WARNING LAMP STAYS ON

LOW TIRE PRESSURE WARNING LAMP STAYS ON

Low Tire Pressure Warning Lamp Stays On When Ignition Switch Is Turned On

INFOID:0000000005148236

DIAGNOSTIC PROCEDURE

1.

BCM CONNECTORS

1. Turn ignition switch OFF.

2. Disconnect BCM harness connectors.

3. Check terminals for damage or loose connections.
Is the inspection result normal?

YES

>> GO TO 2

NO

>> Repair or replace damaged parts.

2.

BCM POWER SUPPLY AND GROUND CIRCUITS

Check BCM power supply and ground circuits.  Refer to 

BCS-33, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> Replace BCM. Refer to 

BCS-59, "Removal and Installation"

.

NO

>> Repair BCM circuits.

LOW TIRE PRESSURE WARNING LAMP BLINKS

WT-39

< SYMPTOM DIAGNOSIS >

C

D

F

G

H

I

J

K

L

M

A

B

WT

N

O

P

LOW TIRE PRESSURE WARNING LAMP BLINKS

Low Tire Pressure Warning Lamp Flashes When Ignition Switch Is Turned On

INFOID:0000000005148237

Regarding Wiring Diagram information, refer to 

WT-30, "Wiring Diagram - TIRE PRESSURE MONITORING

SYSTEM -"

.

NOTE:

If low tire pressure warning lamp flashes as shown, the system is normal.

Flash Mode A

• This mode shows transmitter status is OFF-mode.

Carry out transmitter wake up operation. Refer to 

WT-5, "Transmit-

ter Wake Up Operation"

.

1.

CHECK BCM CONNECTORS

1. Turn ignition switch OFF.

2. Disconnect BCM harness connectors.

3. Check terminals for damage or loose connections.
Is the inspection result normal?

YES

>> GO TO 2

NO

>> Repair or replace damaged parts.

2.

CHECK TIRE PRESSURE WARNING CHECK CONNECTOR CIRCUIT

Check continuity between BCM harness connector M18 terminal 15

and ground.

Is the inspection result normal?

YES

>> Replace BCM. Refer to 

BCS-59, "Removal and Installa-

tion"

.

NO

>> Repair circuit for short to ground.

SEIA0347E

Continuity should not exist.

ALEIA0014ZZ