Infiniti M35/M45 Y50. Manual - part 1144

TROUBLE DIAGNOSES

WT-23

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LOW TIRE PRESSURE WARNING LAMP DIAGNOSTIC CHART

Diagnosis 

Item

Symptom 

(Ignition switch ON)

Low tire pressure warning lamp

Cause

Action

Low tire pres-
sure warning 
lamp

Warning light comes 
on immediately and 
turns off after 1 sec-
ond.

All wheel transmit-
ters are “activated” 
(working).

None (system OK)

Warning light blinks 
on for 2 seconds, 
then turns off for 0.2 
seconds-repeats.

All wheel transmit-
ters are not acti-
vated.

Activate all wheel tire pres-

sure transmitters. Refer to 

WT-19, "Transmitter Wake Up 

Operation"

 .   

Warning light blinks 
1 time.

Tire pressure trans-
mitter front LH is not 
activated.

Activate tire pressure trans-

mitter front LH. Refer to 

WT-

19, "Transmitter Wake Up 

Operation"

 .

Warning light blinks 
2 times.

Tire pressure trans-
mitter front RH is not 
activated.

Activate tire pressure trans-

mitter front RH. Refer to 

WT-

19, "Transmitter Wake Up 

Operation"

 .

Warning light blinks 
3 times.

Tire pressure trans-
mitter rear RH is not 
activated.

Activate tire pressure trans-

mitter rear RH. Refer to 

WT-

19, "Transmitter Wake Up 

Operation"

 .

SEIA0592E

SEIA0593E

SEIA0594E

SEIA0595E

SEIA0596E

WT-24

TROUBLE DIAGNOSES

NOTE:
If more than one wheel transmitter is NOT activated, the warning lamp blinking patterns for those wheels will combine. (Example: one
blink/OFF/three blinks = Tire pressure transmitter rear LH and rear RH are not activated.)

Low tire pres-
sure warning 
lamp

Warning light blinks 
4 times.

Tire pressure trans-
mitter rear LH is not 
activated.

Activate tire pressure trans-

mitter rear LH. Refer to 

WT-

19, "Transmitter Wake Up 

Operation"

 .

Warning light comes 
on and does not turn 
off.

Tire pressure is low.

Check tire pressure with 
CONSULT-II. Refer to 

WT-21, 

"DATA MONITOR MODE"

 .

Warning light blinks 
on for 0.5 seconds 
then turns off for 0.5 
seconds-repeats for 
1 minute, and then 
stays on

The fuse for low tire 
pressure warning 
control unit from bat-
tery is pulled out.

Check the fuse for low tire 
pressure warning control unit 
from battery. Install or replace 
(if needed). 

Low tire pressure 
warning control unit 
connector pulled out

Check low tire pressure warn-
ing control unit connector. Re-
connect if needed.

Tire pressure moni-
toring system mal-
function.

●

Perform CONSULT-II Self-
Diagnosis. Refer to  

WT-20, 

"SELF-DIAG RESULT 
MODE"

 .

–

Perform ID Registration if 
needed. Refer to  

WT-18, 

"ID Registration Procedure"

 

. 

Turn signal 
lamp

Turn signal lamp 
does not flash 2 
times after transmit-
ter activation.

—

1. Tool J-45295 

[SST]

2. Ignition OFF dur-

ing activation.

3. Tool J-45295 

[SST] not posi-
tioned correctly.

4. Transmitters 

already activated.

1. Install new battery.

2. Make sure ignition is ON 

during activation.

3. Position tool correctly dur-

ing activation.

4. None

Diagnosis 

Item

Symptom 

(Ignition switch ON)

Low tire pressure warning lamp

Cause

Action

SEIA0597E

SEIA0598E

SEIA0788E

TROUBLE DIAGNOSES

WT-25

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How to Perform Trouble Diagnosis for Quick and Accurate Repair

NES000K7

INTRODUCTION

●

Before troubleshooting, verify customer complaints.

●

If a vehicle malfunction is difficult to reproduce, harnesses, harness connectors or terminals may be mal-
functioning. Hold and shake these parts to make sure they are securely connected.

●

When using a circuit tester to measure voltage or resistance of each circuit, be careful not to damage or
deform connector terminals. 

WORK FLOW

Preliminary check:

WT-26

Self-diagnosis:

WT-20

Trouble diagnosis for symptoms:

WT-35

SEIA0100E

WT-26

TROUBLE DIAGNOSES

Preliminary Check

NES000K8

BASIC INSPECTION

1. 

CHECK ALL TIRE PRESSURES

Check all tire pressures. Refer to 

WT-41, "SERVICE DATA AND SPECIFICATIONS (SDS)"

 .

OK or NG

OK

>> GO TO 2.

NG

>> Adjust tire pressure to specified value.

2. 

CHECK LOW TIRE PRESSURE WARNING LAMP ACTIVATION

1.

Check low tire pressure warning lamp activation.

2.

Does low tire pressure warning lamp activate for 1 second when ignition switch is turned “ON”.

Does warning lamp activate?

YES

>> GO TO 3.

NO

>> Check fuse and combination meter. Refer to 

DI-5, "COMBINATION METERS"

 .

3. 

CHECK CONNECTOR

1.

Disconnect low tire pressure warning control unit harness connectors M19.

2.

Check terminals for damage or loose connection. 

OK or NG

OK

>> GO TO 4.

NG

>> Repair or replace damaged parts.

4. 

CHECK ACTIVATION TOOL

Check activation tool battery.

OK or NG

OK

>> Perform self-diagnosis.

NG

>> Replace activation tool battery.