Infiniti Q45. Manual - part 909

TROUBLE DIAGNOSIS FOR SYMPTOMS

WT-45

C

D

F

G

H

I

J

K

L

M

A

B

WT

Hazard Warning Lamp Blinks When Ignition Switch Is Turned ON

NES0007K

DIAGNOSTIC PROCEDURE

1. 

CHECK LOW TIRE PRESSURE WARNING CONTROL UNIT CIRCUIT

1.

Turn ignition switch “OFF”.

2.

Disconnect low tire pressure warning control unit harness connector.

3.

Turn ignition switch “ON”. (Do not start engine.)

Does hazard warning lamp blinks?

YES

>> Check the following. If any items are damaged, repair or replace damaged parts.

●

Harness for short to ground between combination flasher unit harness connector M91 terminal
6 and low tire pressure warning control unit harness connector M84 terminal 9.

●

Combination flasher unit.

NO

>> GO TO 2.

2. 

CHECK LOW TIRE PRESSURE WARNING CONTROL UNIT

Check low tire pressure warning control unit input/output signal. Refer to 

WT-17, "Low Tire Pressure Warning

Control Unit Input/Output Signal Reference Values"

 .

OK or NG

OK

>> GO TO 3.

NG

>> Check low tire pressure warning control unit pin terminals for damage or loose connection with

harness connector. If any items are damaged, repair or replace damaged parts.

3. 

CHECK SYMPTOM

Check again.

OK or NG

OK

>> INSPECTION END

NG

>> Replace low tire pressure warning control unit. Refer to 

WT-49, "Removal and Installation"

 .

WT-46

TROUBLE DIAGNOSIS FOR SYMPTOMS

“TIRE PRESSURE” Information In Display Does Not Exist

NES0007L

DIAGNOSTIC PROCEDURE

1. 

CHECK FUSE

Check 10A fuses [No. 21 located in the fuse block (J/B) No.1] for low tire pressure warning control unit. Refer
to 

PG-2, "POWER SUPPLY ROUTING"

 .

OK or NG

OK

>> GO TO 3.

NG

>> GO TO 2.

2. 

CHECK POWER SUPPLY

1.

Turn ignition switch “OFF”.

2.

Disconnect low tire pressure warning control unit harness connector.

3.

Check voltage between low tire pressure warning control unit
harness connector (A) terminals and ground.

4.

Turn ignition switch “ON”. (Do not start engine.)

5.

Check voltage between low tire pressure warning control unit
harness connector (A) terminals and ground.

OK or NG

OK

>> GO TO 3.

NG

>> Check the following. If any items are damaged, repair or 

replace damaged parts.

●

10A fuses [No. 1, 6, 21 located in the fuse block (J/B) No.1]. Refer to 

PG-2, "POWER SUPPLY

ROUTING"

 .

●

Harness for short or open between battery and low tire pressure warning control unit harness
connector M84 terminal 1.

●

Harness for short or open between ignition switch and low tire pressure warning control unit
harness connector M84 terminals 2 and 4.

●

Battery and ignition switch. Refer to 

PG-2, "POWER SUPPLY ROUTING"

 .

Connector

Terminal

Voltage (Approx.)

M84

1 - Ground

Battery voltage

2 - Ground

0 V

4 - Ground

SEIA0746E

Connector

Terminal

Voltage (Approx.)

M84

1 - Ground

Battery voltage

2 - Ground

4 - Ground

SEIA0747E

TROUBLE DIAGNOSIS FOR SYMPTOMS

WT-47

C

D

F

G

H

I

J

K

L

M

A

B

WT

3. 

CHECK LOW TIRE PRESSURE WARNING CONTROL UNIT SIGNAL

1.

Turn ignition switch “ON”. (Do not start engine.)

2.

Check voltage between low tire pressure warning control unit
harness connector terminal and ground.

OK or NG

OK

>> GO TO 4.

NG

>> Check the following. If any items are damaged, repair or 

replace damaged parts.

●

Harness for open or short between low tire pressure control unit harness connector M84 termi-
nal 5 and multifunction switch harness connector M83 terminal 15.

●

Harness for open or short between low tire pressure control unit harness connector M84 termi-
nal 6 and multifunction switch harness connector M83 terminal 16.

●

Harness for open or short between display harness connector M82 terminal 16 and multifunc-
tion switch harness connector M83 terminal 9.

●

Harness for open or short between display harness connector M82 terminal 15 and multifunc-
tion switch harness connector M83 terminal 10.

●

Multifunction switch

●

Display 

4. 

CHECK LOW TIRE PRESSURE WARNING CONTROL UNIT

Check low tire pressure warning control unit input/output signal. Refer to 

WT-17, "Low Tire Pressure Warning

Control Unit Input/Output Signal Reference Values"

 .

OK or NG

OK

>> GO TO 5.

NG

>> Check low tire pressure warning control unit pin terminals for damage or loose connection with

harness connector. If any items are damaged, repair or replace damaged parts.

5. 

CHECK SYMPTOM

Check again.

OK or NG

OK

>> INSPECTION END

NG

>> Replace low tire pressure warning control unit. Refer to 

WT-49, "Removal and Installation"

 .

Connector

Terminal

Voltage (Approx.)

M84

5 - Ground

0 V (Min.) and 5 V (Max.) are 

alternately repeated

6 - Ground

SEIA0054E

WT-48

TROUBLE DIAGNOSIS FOR SYMPTOMS

ID Registration Cannot Be Completed

NES0007M

DIAGNOSTIC PROCEDURE

1. 

ID REGISTRATION

1.

Perform transmitter wake up. Refer to 

WT-25, "Transmitter Wake Up Operation"

 .

2.

Perform ID registration of all transmitters. Refer to 

WT-24, "ID Registration Procedure"

 .

Can ID registration of all transmitters be completed?

YES

>> GO TO 2.

NO

>> Go to 

WT-31, "Transmitter (NO DATA)"

 .

2. 

CHECK LOW TIRE PRESSURE WARNING CONTROL UNIT

Check low tire pressure warning control unit input/output signal. Refer to 

WT-17, "Low Tire Pressure Warning

Control Unit Input/Output Signal Reference Values"

 .

OK or NG

OK

>> GO TO 3.

NG

>> Check low tire pressure warning control unit pin terminals for damage or loose connection with

harness connector. If any items are damaged, repair or replace damaged parts.

3. 

CHECK SYMPTOM

Check again.

OK or NG

OK

>> INSPECTION END

NG

>> Replace low tire pressure warning control unit. Refer to 

WT-49, "Removal and Installation"

 .