Infiniti F50. Manual — part 825
TROUBLE DIAGNOSES
WT-15
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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
EES000DF
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)
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