2004 INFINITI FX35 Lan system

SRS-20
TROUBLE DIAGNOSIS
Revision: 2004 November 2004 FX35/FX45
7. Diagnostic code is displayed on “SELF-DIAG [CURRENT]”.
If no malfunction is detected on “SELF-DIAG [CURRENT]” even
though malfunction is detected in “SRS Operation Check”, check the
battery voltage. If the battery voltage is less than 9V, charge or
replace the battery. Then go to SRS-23, "
DIAGNOSTIC PROCE-
DURE 3" . If the battery voltage is OK, go to SRS-25, "DIAGNOSTIC
PROCEDURE 4 (CONTINUED FROM DIAGNOSTIC PROCEDURE
2)" to diagnose the following cases:

Self-diagnostic result “SELF-DIAG [PAST]” (previously stored in
the memory) might not be erased after repair.

The SRS system malfunctions intermittently.
CONSULT-II Diagnostic Code Chart (“SELF-DIAG [CURRENT]”)
SHIA0203E
SRS701
Diagnostic item ExplanationRepair order
“Recheck SRS at each replacement”
NO DTC IS
DETECTED.When malfunction is
indicated by the “AIR
BAG” warning lamp in
User mode.

Low battery voltage (Less than 9 V)
Go to SRS-23, "DIAGNOSTIC PRO-
CEDURE 3" after charging the bat-
tery.

Self-diagnostic result “SELF-DIAG
[PAST]” (previously stored in the
memory) might not be erased after
repair.

Intermittent malfunction has been
detected in the past.

Go to SRS-25, "DIAGNOSTIC PRO-
CEDURE 4 (CONTINUED FROM
DIAGNOSTIC PROCEDURE 2)" .

Go to SRS-25, "DIAGNOSTIC PRO-
CEDURE 5" .

No malfunction is detected. —
DRIVER AIR BAG
MODULE
[OPEN]

Driver air bag module circuit is open (including the spiral cable). 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible
damage.
3. Replace the driver air bag module.
(Before disposal, it must be
deployed.)
4. Replace the spiral cable.
5. Replace the diagnosis sensor unit.
6. Replace the related harness. DRIVER AIR BAG
MODULE
[VB-SHORT]

Driver air bag module circuit is shorted to a power supply circuit
(including the spiral cable).
DRIVER AIR BAG
MODULE
[GND-SHORT]

Driver air bag module circuit is shorted to ground (including the
spiral cable).
DRIVER AIR BAG
MODULE
[SHORT]

Driver air bag module circuit is shorted between lines.
ASSIST A/B MODULE
[OPEN]

Front passenger air bag module circuit is open. 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible
damage.
3. Replace the front passenger air bag
module. (Before disposal, it must be
deployed.)
4. Replace the diagnosis sensor unit.
5. Replace the related harness. ASSIST A/B MODULE
[VB-SHORT]

Front passenger air bag module circuit is shorted to a power
supply circuit.
ASSIST A/B MODULE
[GND-SHORT]

Front passenger air bag module circuit is shorted to ground.
ASSIST A/B MODULE
[SHORT]

Front passenger air bag module circuit is shorted between lines.

TF-12
AWD SYSTEM
Revision: 2004 November 2004 FX35/FX45
COMPONENTS FUNCTION DESCRIPTION
CAN CommunicationADS000RY
SYSTEM DESCRIPTION
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.
For details, refer to LAN-6, "
CAN Communication Unit" .
Component parts Function
AWD control unit

Controls driving force distribution by signals from each sensor and switch from rear wheel driving
mode (0:100) to AWD mode (50:50).

2WD mode is available by fail-safe function if malfunction is detected in AWD system.
Wheel sensors Detects wheel speed.
AWD solenoid Controls electric controlled coupling by command current from AWD control unit.
Electric controlled coupling Transmits driving force to front final drive.
AWD warning lamp

Illuminates if malfunction is detected in electrical system of AWD system.

There is 1 blink in 2 seconds if rotation difference of front wheels and rear wheels is large.

There are 2 blinks in 1 second if load is still applied to driving parts.
ABS actuator and electric unit
(control unit)Transmits the following signals via CAN communication to AWD control unit.

Vehicle speed signal

Stop lamp switch signal (brake signal)
ECMTransmits the following signals via CAN communication to AWD control unit.

Accelerator pedal position signal

Engine speed signal
Unified meter and A/C amp. Transmits conditions of parking brake switch via CAN communication to AWD control unit.

TROUBLE DIAGNOSIS FOR SYSTEM
TF-31
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Revision: 2004 November 2004 FX35/FX45
4. CHECK DTC
Perform the self-diagnosis, after driving a vehicle for a while.
OK or NG
OK >>INSPECTION END
NG >> Replace AWD control unit.
Engine Control SignalADS001G5
DIAGNOSTIC PROCEDURE

Check the following if “ECM SIGNAL 1 [C1210]” is displayed in self-diagnostic results of CONSULT-II.
1. CHECK DTC WITH ECM
Perform self-diagnosis with ECM. Refer to EC-54, "
Emission-Related Diagnostic Information" (VQ engine
models) or EC-704, "
Emission-related Diagnostic Information" (VK engine models).
Is any malfunction detected by self-diagnosis?
YES >> Check the malfunctioning system.
NO >> GO TO 2.
2. CHECK AWD CONTROL UNIT
Check AWD control unit input/output signal. Refer to TF-19, "
AWD Control Unit Input/Output Signal Reference
Va l u e s" .
OK or NG
OK >> GO TO 3.
NG >> Check AWD control unit pin terminals for damage or loose connection with harness connector. If
any items are damaged, repair or replace damaged parts.
3. CHECK DTC
Perform the self-diagnosis, after driving a vehicle for a while.
OK or NG
OK >>INSPECTION END
NG >> Perform self-diagnosis with ECM again. Refer to EC-54, "
Emission-Related Diagnostic Informa-
tion" (VQ engine models) or EC-704, "Emission-related Diagnostic Information" (VK engine mod-
els).
CAN Communication LineADS0018G
DIAGNOSTIC PROCEDURE

Check the following if “CAN COMM CIRCUIT [U1000]” is detected in self-diagnostic results of CONSULT-
II.
1. CHECK CAN COMMUNICATION CIRCUIT
With CONSULT-II
1. Turn ignition switch “ON” and start engine.
2. Select “SELF-DIAG RESULTS” mode for “ALL MODE AWD/4WD” with in CONSULT-II.
3. Perform the self-diagnosis.
Is the
“CAN COMM CIRCUIT [U1000]” displayed?
YES >> Go to LAN-4, "Precautions When Using CONSULT-II" .
NO >>INSPECTION END
SDIA1850E

WT-1
ROAD WHEELS & TIRES
E SUSPENSION
CONTENTS
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SECTION WT
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B
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Revision: 2004 November 2004 FX35/FX45
ROAD WHEELS & TIRES
PREPARATION ........................................................... 2
Special Service Tools ............................................... 2
Commercial Service Tools ........................................ 2
NOISE, VIBRATION AND HARSHNESS (NVH)
TROUBLESHOOTING ................................................ 3
NVH Troubleshooting Chart ..................................... 3
ROAD WHEEL ............................................................ 4
Inspection ................................................................. 4
ALUMINUM WHEEL ............................................. 4
STEEL WHEEL ..................................................... 4
ROAD WHEEL TIRE ASSEMBLY .............................. 5
Balancing Wheels (Bonding Weight Type) ............... 5
REMOVAL ............................................................. 5
WHEEL BALANCE ADJUSTMENT ...................... 5
Tire Rotation ............................................................. 6
LOW TIRE PRESSURE WARNING SYSTEM ............ 7
System Components ................................................ 7
System Description .................................................. 7
TRANSMITTER ..................................................... 7
LOW TIRE PRESSURE WARNING CONTROL
UNIT ...................................................................... 7
ANTENNA ............................................................. 8
DISPLAY UNIT ...................................................... 8
CAN COMMUNICATION ............................................ 9
System Description .................................................. 9
TROUBLE DIAGNOSES .......................................... 10
Schematic .............................................................. 10
Wiring Diagram ....................................................... 11
Control Unit Input/Output Signal Standard ............. 14
ID Registration Procedure ...................................... 14
ID REGISTRATION WITH TRANSMITTER
ACTIVATION TOOL ............................................ 14
ID REGISTRATION WITHOUT TRANSMITTER
ACTIVATION TOOL ............................................ 15
Transmitter Wake Up Operation ............................. 16
WITH TRANSMITTER ACTIVATION TOOL ........ 16
Self-Diagnosis ........................................................ 17
DESCRIPTION .................................................... 17
FUNCTION .......................................................... 17CONSULT-II ......................................................... 17
How to Perform Trouble Diagnosis for Quick and
Accurate Repair ...................................................... 19
INTRODUCTION ................................................. 19
WORK FLOW ...................................................... 19
Preliminary Check .................................................. 20
Malfunction Code/Symptom Chart .......................... 21
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC
ITEMS ........................................................................ 22
Inspection 1: Transmitter or Low Tire Pressure
Warning Control Unit .............................................. 22
MALFUNCTION CODE NO. 21, 22, 23 OR 24 ... 22
Inspection 2: Transmitter - 1 ................................... 22
MALFUNCTION CODE NO. 31, 32, 33, 34, 41,
42, 43, 44, 45, 46, 47 OR 48 ............................... 22
Inspection 3: Transmitter - 2 ................................... 23
MALFUNCTION CODE NO. 35, 36, 37 OR 38 ... 23
Inspection 4: Vehicle Speed Signal ........................ 24
MALFUNCTION CODE NO. 52 ........................... 24
TROUBLE DIAGNOSIS FOR SYMPTOMS .............. 25
Inspection 1: Warning Lamp Does Not Come On
When Ignition Switch Is Turned On. ....................... 25
Inspection 2: Warning Lamp Stays On When Ignition
Switch Is Turned On. .............................................. 26
Inspection 3: Warning Lamp Blinks When Ignition
Switch Is Turned On. .............................................. 28
Inspection 4: Hazard Warning Lamp Blinks When
Ignition Switch Is Turned On. ................................. 29
Inspection 5: “TIRE PRESSURE” Information In
Display Unit Does Not Exist. ................................... 30
Inspection 6: ID Registration Cannot Be Completed. ... 30
REMOVAL AND INSTALLATION ............................. 31
Transmitter ............................................................. 31
REMOVAL ........................................................... 31
INSTALLATION ................................................... 31
SERVICE DATA ........................................................ 33
Road Wheel ............................................................ 33
Tire ......................................................................... 33
Tightening Torque ................................................... 33

CAN COMMUNICATION
WT-9
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Revision: 2004 November 2004 FX35/FX45
CAN COMMUNICATIONPFP:23710
System DescriptionAES000OQ
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.
Refer to LAN-6, "
CAN COMMUNICATION" .

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
WT-25
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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-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" .