air INFINITI FX35 2004 Service Manual

TROUBLE DIAGNOSES
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Revision: 2004 November 2004 FX35/FX45
How to Perform Trouble Diagnosis for Quick and Accurate RepairAES000NY
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 expand con-
nector terminals.
WORK FLOW
Preliminary check:WT-20Self-diagnosis:WT-17Trouble diagnosis for symptoms:WT-25
SEIA0100E

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)

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.

WT-24
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
Revision: 2004 November 2004 FX35/FX45
Inspection 4: Vehicle Speed SignalAES000O4
MALFUNCTION CODE NO. 52
1. SELF-DIAGNOSIS 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 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 3.
NG >> Check unified meter and A/C amp. power supply circuit
for open or short.
3. CHECK UNIFIED METER AND A/C AMP. GROUND CIRCUIT

Check continuity between unified meter and A/C amp. harness connector M56 terminals 29 (B), 30 (B)
and ground.
OK or NG
OK >> Check unified meter and A/C amp. self-diagnostic. Refer
to DI-32, "
SELF-DIAGNOSTIC RESULTS" .
NG >> Repair or replace unified meter and A/C amp. 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
M5621 (R/W)
22 (G/R)
SEIA0337E
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

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

TROUBLE DIAGNOSIS FOR SYMPTOMS
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Revision: 2004 November 2004 FX35/FX45
Inspection 4: Hazard Warning Lamp Blinks When Ignition Switch Is Turned On.AES000O8
DIAGNOSTIC PROCEDURE
1. CHECK GROUND CIRCUIT
1. Disconnect low tire pressure waning control unit connector M74.
2. Check continuity between low tire pressure warning control unit harness 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
Continuity
(+) (–)
ConnectorTe r m i n a l
(Wire color)
Ground Yes
M74 20 (B)
SEIA0343E

WT-30
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: 2004 November 2004 FX35/FX45
Inspection 5: “TIRE PRESSURE” Information In Display Unit Does Not Exist.AES000O9
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 DISPLAY CONTROL UNIT

Perform display control unit self-diagnosis. Refer to AV- 1 3 1 , "Self-Diagnosis Mode (DCU)" .
OK or NG
OK >> Replace low tire pressure warning control unit.
NG >> Repair or replace malfunctioning parts.
Inspection 6: ID Registration Cannot Be Completed.AES000OA
DIAGNOSTIC PROCEDURE
1. ID REGISTRATION (ALL)

Carry out ID registration of all transmitters.

Can ID registration of all transmitters be completed?
YES or NO
YES >> INSPECTION END.
NO >> GO TO WT-22, "
Inspection 1: Transmitter or Low Tire Pressure Warning Control Unit" .