warning INFINITI FX35 2004 Service Manual

TROUBLE DIAGNOSES
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Revision: 2004 November 2004 FX35/FX45
Self-DiagnosisAES000NX
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 in the combination meter 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 Main Function
In a diagnosis function (main function), there are “WORK SUPPORT”, “SELF-DIAGNOSTIC RESULTS”,
“DATA MONITOR”, “CAN DIAG SUPPORT MNTR”.
CONSULT-II Application to Low Tire Pressure Warning System
×: Applicable
–: Not applicable
Self-Diagnostic Results Mode
Diagnostic test mode Function
WORK SUPPORTThis mode enables a technician to adjust some devices faster and more accurately by following
the indications on CONSULT-II.
SELF-DIAGNOSTIC
RESULTSSelf-diagnostic results can be read and erased quickly.
DATA MONITOR Input/Output data in the control unit can be read.
CAN DIAG SUPPORT MNTR The results of transmit/receive diagnosis of communication can be read.
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)−×
CAN Communication××
Diagnostic item Diagnostic item is detected when ···
FLAT - TIRE - FL
FLAT - TIRE - FR
FLAT - TIRE - RR
FLAT - TIRE - RLFront-left tire pressure drops to 190 kPa (1.9 kg/cm
2 , 27 psi) or less
Front-right tire pressure drops to 190 kPa (1.9 kg/cm2 , 27 psi) or less
Rear-right tire pressure drops to 190 kPa (1.9 kg/cm2 , 27 psi) or less
Rear-left tire pressure drops to 190 kPa (1.9 kg/cm2 , 27 psi) or less
[NO-DATA] - FL
[NO-DATA] - FR
[NO-DATA] - RR
[NO-DATA] - RLData 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] - RLChecksum 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] - RLAir 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.

WT-18
TROUBLE DIAGNOSES
Revision: 2004 November 2004 FX35/FX45
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.
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.[CODE- ERR] - FL
[CODE- ERR] - FR
[CODE- ERR] - RR
[CODE- ERR] - RLFunction 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] - RLBattery 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.
VHCL_SPEED_SIG_ERR Vehicle speed signal is error.Diagnostic item Diagnostic item is detected when ···
MONITOR CONDITION SPECIFICATION
VHCL SPEED SE Drive vehicle. Vehicle speed (km/h or MPH)
AIR PRESS FL
AIR PRESS FR
AIR PRESS RR
AIR PRESS RL

Drive vehicle for a few minutes.
Tire pressure (kPa or psi) or

Ignition switch ON and activation tool
is transmitting activation signals.
ID REGST FL
ID REGST FR
ID REGST RR
ID REGST RL
Ignition switch ONRegistration ID: DONE
No registration ID: YET
WARNING LAMPWarning lamp on: ON
Warning lamp off: OFF
BUZZERBuzzer in Low tire pressure warning control unit on: ON
Buzzer in Low tire pressure warning control unit off: OFF

WT-20
TROUBLE DIAGNOSES
Revision: 2004 November 2004 FX35/FX45
Preliminary CheckAES000NZ
BASIC INSPECTION
1. CHECK ALL TIRES PRESSURES

Check all tires pressures.
OK or NG
OK >> GO TO 2.
NG >> Adjust tire pressure to specified value.
2. CHECK WARNING LAMP ACTIVATION
1. Check warning lamp activation.
2. Does warning lamp activate for 1 seconds when ignition switch is turned “ON”.
Does warning lamp active?
YES >> GO TO 3.
NO >> Check fuse and combination meter.
3. CHECK CONNECTOR
1. Disconnect low tire pressure warning control unit harness connectors M74 and R102.
2. Check terminals for damage or loose connection.
3. Reconnect harness connector.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts.
4. CHECK TRANSMITTER ACTIVATION TOOL

Check transmitter activation tool battery.
OK or NG
OK >> Carry out self-diagnosis.
NG >> Replace transmitter activation tool battery.Tire pressure
: 220 kPa (2.2 kg/cm
2 , 32 psi)

TROUBLE DIAGNOSES
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Malfunction Code/Symptom ChartAES000O0
Code/Symptom Malfunction partReference
page
15
16
17
18Front-left tire pressure drops to 190 kPa (1.9 kg/cm
2 , 27 psi) or less
Front-right tire pressure drops to 190 kPa (1.9 kg/cm2 , 27 psi) or less
Rear-right tire pressure drops to 190 kPa (1.9 kg/cm2 , 27 psi) or less
Rear-left tire pressure drops to 190 kPa (1.9 kg/cm2 , 27 psi) or less—
21
22
23
24Transmitter no data (front - left)
Transmitter no data (front - right)
Transmitter no data (rear - right)
Transmitter no data (rear - left)WT-22
31
32
33
34Transmitter checksum error (front - left)
Transmitter checksum error (front - right)
Transmitter checksum error (rear - right)
Transmitter checksum error (rear - left)WT-22
35
36
37
38Transmitter pressure data error (front - left)
Transmitter pressure data error (front - right)
Transmitter pressure data error (rear - right)
Transmitter pressure data error (rear - left)WT-23
41
42
43
44Transmitter function code error (front - left)
Transmitter function code error (front - right)
Transmitter function code error (rear - right)
Transmitter function code error (rear - left)WT-22
45
46
47
48Transmitter battery voltage low (front - left)
Transmitter battery voltage low (front - right)
Transmitter battery voltage low (rear - right)
Transmitter battery voltage low (rear - left)WT-22
52 Vehicle speed signalWT-24
Warning lamp does not come on when
ignition switch is turned on.Fuse or unified meter and A/C amp.
Low tire pressure warning control unit connector or circuit
Low tire pressure warning control unit WT-25
Warning lamp stays on when ignition
switch is turned on.Fuse or unified meter and A/C amp.
Low tire pressure warning control unit connector or circuit
Low tire pressure warning control unitWT-26
Warning lamp blinks when ignition
switch is turned on.Low tire pressure warning control unit harness connector or circuit
Low tire pressure warning control unit
Transmitter's mode off
ID registration not yetWT-28
Hazard warning lamp blinks when igni-
tion switch is turned on.Low tire pressure warning control unit harness connector or circuit
Low tire pressure warning control unitWT-29
“TIRE PRESSURE” information in dis-
play does not exist.Fuse
Display control unit
Low tire pressure warning control unit WT-30
ID registration cannot be completed.Transmitter
Antenna harness connector or circuit
AntennaWT-30

WT-22
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
Revision: 2004 November 2004 FX35/FX45
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMSPFP:00000
Inspection 1: Transmitter or Low Tire Pressure Warning Control UnitAES000O1
MALFUNCTION CODE NO. 21, 22, 23 OR 24
1. CHECK CONTROL UNIT

Drive for several minutes. Check all tires' pressure with CONSULT-II “DATA MONITOR ITEM”.
Are all tires' pressure displayed 0 kPa?
YES >> GO TO 2.
NO >> GO TO 3.
2. CHECK ANTENNA CONNECTOR

Check antenna and feeder connector R102 for damage or loose connections.
OK or NG
OK >> Replace control unit, GO TO 3.
NG >> Repair or replace antenna or feeder connector.
3. ID REGISTRATION

Carry out ID registration of all transmitters.
Is there a tire that cannot register ID?
YES >> Replace transmitter of the tire, then GO TO 5.
NO >> GO TO 4.
4. VEHICLE DRIVING

Drive at a speed of 40 km/h (25 MPH) or more for several minutes without stopping.
Check all tires' pressure with CONSULT-II “DATA MONITOR ITEM” within 15 minutes after vehicle speed
becomes 17 km/h (11 MPH).
Does
“DATA MONITOR ITEM” displayed tire pressure as normal without any warning lamp?
YES >> INSPECTION END.
NO >> GO TO 5.
5. ID REGISTRATION AND VEHICLE DRIVING
1. Carry out ID registration of all transmitters.
2. Drive at a speed of 40 km/h (25 MPH) or more for 3 minutes, and then drive the vehicle at any speed for
10 minutes. Then check all tires' pressure with CONSULT-II “DATA MONITOR ITEM” within 5 minutes.
Does
“DATA MONITOR ITEM” displayed tire pressure as normal without any warning lamp?
YES >> GO TO inspection applicable to DTC.
NO >> INSPECTION END.
Inspection 2: Transmitter - 1AES000O2
MALFUNCTION CODE NO. 31, 32, 33, 34, 41, 42, 43, 44, 45, 46, 47 OR 48
1. ID REGISTRATION (CORRECTION OF TRANSMITTER LOCATION)
1. Carry out ID registration of all transmitters.
2. Drive at a speed of 40 km/h (25 MPH) or more for 3 minutes, and then drive the vehicle at any speed for
10 minutes.
>> GO TO 2.

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
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Revision: 2004 November 2004 FX35/FX45
2. REPLACE TRANSMITTER
1. Check warning lamp for blink again, replace malfunctioning transmitter.
2. Carry out ID registration of all transmitter.
Can ID registration of all transmitters be completed?
YES >> GO TO 3.
NO >> GO TO Inspection 1.
3. VEHICLE DRIVING

Drive at a speed of 40 km/h (25 MPH) or more for 3 minutes, and then drive the vehicle at any speed for
10 minutes. Then check all tires' pressure with CONSULT-II “DATA MONITOR ITEM” within 5 minutes.
Does
“DATA MONITOR ITEM” displayed tire pressure as normal without any warning lamp?
YES >> INSPECTION END.
NO >> Replace malfunctioning transmitter, and perform “Step 3” again.
Inspection 3: Transmitter - 2AES000O3
MALFUNCTION CODE NO. 35, 36, 37 OR 38
1. CHECK ALL TIRE PRESSURE

Check all tire pressures.
OK >> GO TO 2.
NG >> Adjust tire pressure to specified value.
2. VEHICLE DRIVING
1. Carry out ID registration of all transmitters.
2. Drive at a speed of 40 km/h (25 MPH) or more for several minutes without stopping.
Check all tires' pressure with CONSULT-II “DATA MONITOR ITEM” within 15 minutes after vehicle speed
become 17 km/h (11 MPH).
>> Replace transmitter with new one if “DATA MONITOR ITEM” displayed 64 psi or more. Then GO
TO 3.
3. ID REGISTRATION AND VEHICLE DRIVING

Carry out ID registration of all transmitters.

Drive at a speed of 40 km/h (25 MPH) or more for 3 minutes, and then drive the vehicle at any speed for
10 minutes. Then check all tires' pressure with CONSULT-II “DATA MONITOR ITEM” within 5 minutes.
Does
“DATA MONITOR ITEM” displayed tire pressure as normal without any warning lamp?
YES >> INSPECTION END.
NO >> GO TO the inspection applicable to DTC.Tire pressure
: 220 kPa (2.2 kg/m
2 , 32 psi)

TROUBLE DIAGNOSIS FOR SYMPTOMS
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Revision: 2004 November 2004 FX35/FX45
TROUBLE DIAGNOSIS FOR SYMPTOMSPFP:00007
Inspection 1: Warning Lamp Does Not Come On When Ignition Switch Is Turned
On.
AES000O5
DIAGNOSTIC PROCEDURE
1. SELF-DIAGNOSTIC RESULT CHECK
1. Connect CONSULT-II and CONSULT-II CONVERTER to data link connector.
NOTE:
If “AIR PRESSURE MONITOR” is not indicated, go to GI-40, "
CONSULT-II Data Link Connector (DLC)
Circuit"
2. Select “AIR PRESSURE MONITOR” on “SELECT SYSTEM” screen.
3. Select “SELF-DIAG RESULTS” on “SELECT DIAG MODE” screen.
4. Check display contents in self-diagnostic results.
Is
“CAN COMM CIRCUIT” displayed in the self-diagnosis display items?
YES >> Malfunction in CAN communication system. GO TO LAN-4, "Precautions When Using CONSULT-
II" .
NO >> GO TO 2.
2. CHECK COMBINATION METER

Check combination meter operation.
OK or NG
OK >> GO TO 3.
NG >> Check combination meter. Refer to DI-4, "
System Description" .
3. CHECK WARNING LAMP

Disconnect low tire pressure warning control unit connector.
Does the warning lamp activate?
YES >> Replace low tire pressure warning control unit.
NO >> GO TO 4.
4. CHECK UNIFIED METER AND A/C AMP. POWER SUPPLY CIRCUIT
1. Disconnect unified meter and A/C amp. connector M56.
2. Check voltage between unified meter and A/C amp. harness connector M56 terminals 21 (R/W), 22 (G/R)
and ground.
OK or NG
OK >> GO TO 5.
NG >> Check unified meter and A/C amp. power supply circuit
for open or short.Te r m i n a l s
Vo l ta g e
(Approx.)
(+) (–)
ConnectorTe r m i n a l
(Wire color)
Ground 12 V
M5621 (R/W)
22 (G/R)SEIA0337E

WT-26
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: 2004 November 2004 FX35/FX45
5. CHECK UNIFIED METER AND A/C AMP. GROUND CIRCUIT

Check continuity between unified meter and A/C amp. connector M56 terminals 29 (B), 30 (B) and
ground.
OK or NG
OK >> Check unified meter and A/C amp. Refer to DI-28, "Sys-
tem Description" .
NG >> Repair or replace unified meter and A/C amp. ground circuit.
Inspection 2: Warning Lamp Stays On When Ignition Switch Is Turned On.AES000O6
DIAGNOSTIC PROCEDURE
1. CHECK CONNECTOR
1. Disconnect low tire pressure warning control unit connectors M74.
2. Check terminals for damage or loose connections.
OK or NG
OK >> GO TO 2.
NG >> Repair or replace damaged parts.
2. CHECK POWER SUPPLY CIRCUIT 1
Check voltage between low tire pressure warning control unit connector M74 terminal 12 (R/W) and ground.
OK or NG
OK >> GO TO 3.
NG >> Check low tire pressure warning control unit power sup-
ply circuit for open or short.Te r m i n a l s
Continuity
(+) (–)
ConnectorTe r m i n a l
(Wire color)
Ground Yes
M5629 (B)
30 (B)
SEIA0338E
Te r m i n a l s
Vo l ta g e
(Approx.)
(+) (–)
ConnectorTe r m i n a l
(Wire color)
Ground 12 V
M74 12 (R/W)
SEIA0341E

TROUBLE DIAGNOSIS FOR SYMPTOMS
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Revision: 2004 November 2004 FX35/FX45
3. CHECK POWER SUPPLY CIRCUIT 2
1. Turn ignition switch ON.
2. Check voltage between low tire pressure warning control unit connector M74 terminals 11 (LG/R), 24 (G/
R) and ground.
OK or NG
OK >> GO TO 4.
NG >> Check low tire pressure warning control unit power sup-
ply circuit for open or short.
4. CHECK GROUND CIRCUIT

Check continuity between low tire pressure warning control unit connector M74 terminal 20(B) and
ground.
OK or NG
OK >> Replace low tire pressure warning control unit.
NG >> Repair or replace low tire pressure warning control unit
ground circuit.Te r m i n a l s
Vo l ta g e
(Approx.)
(+) (–)
ConnectorTe r m i n a l
(Wire color)
Ground 12 V
M7411 ( LG /R )
24 (G/R)
SEIA0342E
Te r m i n a l s
Continuity
(+) (–)
ConnectorTe r m i n a l
(Wire color)
Ground Yes
M74 20 (B)
SEIA0343E

WT-28
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: 2004 November 2004 FX35/FX45
Inspection 3: Warning Lamp Blinks When Ignition Switch Is Turned On.AES000O7
NOTE:
If warning lamp blink below, the system is normal.
Blink Mode A

This mode shows transmitter status is OFF-mode.
Carry out transmitter wake up operation. Refer to WT-16,
"Transmitter Wake Up Operation" .
DIAGNOSTIC PROCEDURE
1. CHECK CONNECTOR
1. Disconnect low tire pressure warning control unit connectors M74 and R102.
2. Check terminals for damage or loose connections.
OK or NG
OK >> GO TO 2.
NG >> Repair or replace damaged parts.
2. CHECK TIRE PRESSURE WARNING CHECK CONNECTOR CIRCUIT
1. Disconnect low tire pressure warning control unit connector M74.
2. Check continuity between low tire pressure warning control unit harness connector M74 terminal 8 (G)
and ground.
OK or NG
OK >> Replace low tire pressure warning control unit.
NG >> Repair or replace harness connector.
SEIA0347E
Te r m i n a l s
Continuity
(+) (–)
ConnectorTe r m i n a l
(Wire color)
Ground No
M74 8 (G)
SEIA0344E