Infiniti F50. Manual - part 825

TROUBLE DIAGNOSES

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Self-Diagnosis

EES000EP

DESCRIPTION

During driving, the low tire pressure warning system receives the signal transmitted from the transmitter
installed in each wheel, and gives alarms when the tire pressure becomes low. The control unit of this system
has pressure judgement and trouble diagnosis functions.

FUNCTION

When the low tire pressure warning system detects low inflation pressure or another unusual symptom, the
warning lamps on the instrument panel comes on. To start the self-diagnostic results mode, ground the self-
diagnostic (check) terminal. The malfunction location is indicated by the warning lamp flashing and the buzzer
sounds.

CONSULT-II
CONSULT-II Application to Low Tire Pressure Warning System

×

: Applicable

 –: Not applicable

Self-Diagnostic Results Mode

NOTE:
Before performing the self-diagnosis, be sure to register the ID. Or, the actual malfunction location may be different from that displayed
on CONSULT-II.

ITEM

SELF-DIAGNOSTIC RESULTS

DATA MONITOR

Front - Left transmitter

×

×

Front - Right transmitter

×

×

Rear - Left transmitter

×

×

Rear - Right transmitter

×

×

Warning lamp

—

×

Vehicle speed

—

×

Buzzer (in control unit)

—

×

Diagnostic item

Diagnostic item is detected when ···

FLAT - TIRE - FL
FLAT - TIRE - FR
FLAT - TIRE - RR
FLAT - TIRE - RL

Front-left tire pressure drops to 190kPa(1.9kg/cm

2

 , 27psi) or less

Front-right tire pressure drops to 190kPa(1.9kg/cm

2

 , 27psi) or less

Rear-right tire pressure drops to 190kPa(1.9kg/cm

2

 , 27psi) or less

Rear-left tire pressure drops to 190kPa(1.9kg/cm

2

 , 27psi) or less

[NO-DATA] - FL
[NO-DATA] - FR
[NO-DATA] - RR
[NO-DATA] - RL

Data from front-left transmitter cannot be received.
Data from front-right transmitter cannot be received.
Data from rear-right transmitter cannot be received.
Data from rear-left transmitter cannot be received.

[CHECKSUM- ERR] - FL
[CHECKSUM- ERR] - FR
[CHECKSUM- ERR] - RR
[CHECKSUM- ERR] - RL

Checksum data from front-left transmitter is malfunctioning.
Checksum data from front-right transmitter is malfunctioning.
Checksum data from rear-right transmitter is malfunctioning.
Checksum data from rear-left transmitter is malfunctioning.

[PRESSDATA- ERR] - FL
[PRESSDATA- ERR] - FR
[PRESSDATA- ERR] - RR
[PRESSDATA- ERR] - RL

Air pressure data from front-left transmitter is malfunctioning.
Air pressure data from front-right transmitter is malfunctioning.
Air pressure data from rear-right transmitter is malfunctioning.
Air pressure data from rear-left transmitter is malfunctioning.

[CODE- ERR] - FL
[CODE- ERR] - FR
[CODE- ERR] - RR
[CODE- ERR] - RL

Function code data from front-left transmitter is malfunctioning.
Function code data from front-right transmitter is malfunctioning.
Function code data from rear-right transmitter is malfunctioning.
Function code data from rear-left transmitter is malfunctioning.

[BATT - VOLT - LOW] - FL
[BATT - VOLT - LOW] - FR
[BATT - VOLT - LOW] - RR
[BATT - VOLT - LOW] - RL

Battery voltage of front-left transmitter drops.
Battery voltage of front-right transmitter drops.
Battery voltage of rear-right transmitter drops.
Battery voltage of rear-left transmitter drops.

RECEIVER - ID - NO - REG

No ID registration has been made to the low tire pressure warning control unit.

WT-16

TROUBLE DIAGNOSES

Data Monitor Mode

NOTE:
Before performing the self-diagnosis, be sure to register the ID. Or, the actual malfunction location may be different from that displayed
on CONSULT-II.

MONITOR

CONDITION

SPECIFICATION

VEHICLE SPEED

Drive vehicle.

Vehicle speed (km/h or MPH)

PRESSURE FL
PRESSURE FR
PRESSURE RR
PRESSURE RL

●

Drive vehicle for a few minutes.
              or 

●

Ignition switch ON and activa-
tion tool is transmitting acti-
vate signals. 

Tire pressure (kPa or Psi)

ID FL
ID FR
ID RR
ID RL

Ignition switch ON

Registration ID: DONE
No registration ID: YET

WARNING LAMP

Warning lamp on: ON
Warning lamp off: OFF

BUZZER

Buzzer in Low tire pressure warning control unit on: ON
Buzzer in Low tire pressure warning control unit off: OFF

TROUBLE DIAGNOSES

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How to Perform Trouble Diagnosis for Quick and Accurate Repair

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INTRODUCTION

●

Before troubleshooting, verify customer complaints.

●

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

●

When using a circuit tester to measure voltage or resistance of each circuit, be careful not to expand con-
nector terminals. 

WORK FLOW

SEIA0100E

WT-18

TROUBLE DIAGNOSES

Preliminary Check

EES000EQ

BASIC INSPECTION

1. 

CHECK ALL TIRES PRESSURES

●

Check all tires pressures.

Tire pressure is OK?

OK

>> GO TO 2.

NG

>> Adjust tire pressure to specified value. GO TO 2.

2. 

CHECK WARNING LAMP ACTIVATION

●

Check warning lamp activation.

●

Does warning lamp activate for 1 second when ignition switch is turned “ON”?

OK or NG?

OK

>> GO TO 3.

NG

>> Check fuse and combination meter. Then repair or replace malfunctioning parts.

3. 

CHECK CONNECTOR

1.

Disconnect low tire pressure warning control unit harness connector.

2.

Check pin terminals for damage. 

3.

Reconnect harness connector.

Inspection results OK?

OK

>> GO TO 4.

NG

>> Repair or replace damaged parts.

4. 

CHECK TRANSMITTER ACTIVATION TOOL

●

Check transmitter tool battery.

Inspection results OK?

OK

>> Carry out self-diagnosis.

NG

>> Replace transmitter activation tool battery.

Tire pressure:

 230 kPa (2.3 kg/cm

2

 , 33 psi)