2004 INFINITI FX35 ECU

EC-972
[VK45DE]
DTC P0420, P0430 THREE WAY CATALYST FUNCTION
Revision: 2004 November 2004 FX35/FX45
8. Select “DTC & SRT CONFIRMATION” then “SRT WORK SUP-
PORT” mode with CONSULT-II.
9. Rev engine up to 2,000 to 3,000 rpm and hold it for 3 consecu-
tive minutes then release the accelerator pedal completely.
If “INCMP” of “CATALYST” changed to “CMPLT”, go to step 12.
10. Wait 5 seconds at idle.
11. Rev engine up to 2,000 to 3,000 rpm and maintain it until
“INCMP” of “CATALYST” changes to “CMPLT” (It will take
approximately 5 minutes).
If not “CMPLT”, stop engine and cool it down to less than 70°C
(158°F) and then retest from step 1.
12. Select “SELF-DIAG RESULTS” mode with CONSULT-II.
13. Confirm that the 1st trip DTC is not detected.
If the 1st trip DTC is detected, go to EC-973, "
Diagnostic Proce-
dure" .
Overall Function CheckABS00C5F
Use this procedure to check the overall function of the three way catalyst (manifold). During this check, a 1st
trip DTC might not be confirmed.
WITH GST
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.
3. Let engine idle for 1 minute.
4. Open engine hood.
5. Set voltmeters probes between ECM terminals 16 [HO2S1
(bank 1) signal], 35 [HO2S1 (bank 2) signal] and ground, and
ECM terminals 55 [HO2S2 (bank 1) signal], 74 [HO2S2 (bank 2)
signal] and ground.
6. Keep engine speed at 2,000 rpm constant under no load.
SEF940Z
SEF941Z
SEF535Z
PBIB1528E

EC-984
[VK45DE]
DTC P0442 EVAP CONTROL SYSTEM
Revision: 2004 November 2004 FX35/FX45
5. INSTALL THE PRESSURE PUMP
To locate the EVAP leak, install EVAP service port adapter and pres-
sure pump to EVAP service port securely. For the location of EVAP
service port, refer to EC-1321, "
EVAPORATIVE EMISSION LINE
DRAWING" .
NOTE:
Improper installation of the EVAP service port adapter to the EVAP service port may cause leaking.
With CONSULT-II>>GO TO 6.
Without CONSULT-II>>GO TO 7.
PBIB1479E
SEF916U

DTC P0455 EVAP CONTROL SYSTEM
EC-1023
[VK45DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
Revision: 2004 November 2004 FX35/FX45

Use only a genuine NISSAN rubber tube as a replacement.
DTC Confirmation ProcedureABS00C6P
CAUTION:
Never remove fuel filler cap during the DTC Confirmation Procedure.
NOTE:

Make sure that EVAP hoses are connected to EVAP canister purge volume control solenoid valve
properly.

If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait
at least 10 seconds before conducting the next test.
TESTING CONDITION:

Perform “DTC WORK SUPPORT” when the fuel level is between 1/4 and 3/4 full, and vehicle is
placed on flat level surface.

Open engine hood before conducting the following procedures.
WITH CONSULT-II
1. Tighten fuel filler cap securely until ratcheting sound is heard.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Turn ignition switch ON and select “DATA MONITOR” mode with CONSULT-II.
5. Make sure that the following conditions are met.
COOLAN TEMP/S: 0 - 70°C (32 - 158°F)
INT/A TEMP SE: 0 - 60°C (32 - 140°F)
6. Select “EVAP SML LEAK P0442/P1442” of “EVAPORATIVE SYSTEM” in “DTC WORK SUPPORT” mode
with CONSULT-II.
Follow the instruction displayed.
NOTE:
If the engine speed cannot be maintained within the range displayed on the CONSULT-II screen, go to
EC-733, "
Basic Inspection" .
7. Make sure that “OK” is displayed.
If “NG” is displayed, select “SELF-DIAG RESULTS” mode and
make sure that “EVAP GROSS LEAK [P0455]” is displayed. If it
is displayed, refer to EC-1024, "
Diagnostic Procedure" .
If P0442 is displayed, perform Diagnostic Procedure for DTC
P0442 EC-983, "
Diagnostic Procedure" .
PBIB0829E
SEC763C

DTC P0455 EVAP CONTROL SYSTEM
EC-1025
[VK45DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
Revision: 2004 November 2004 FX35/FX45
5. CHECK EVAP PURGE LINE
Check EVAP purge line (pipe, rubber tube, fuel tank and EVAP canister) for cracks, improper connection or
disconnection.
Refer to EC-1321, "
EVAPORATIVE EMISSION LINE DRAWING" .
OK or NG
OK >> GO TO 6.
NG >> Repair or reconnect the hose.
6. CLEAN EVAP PURGE LINE
Clean EVAP purge line (pipe and rubber tube) using air blower.
>> GO TO 7.
7. CHECK EVAP CANISTER VENT CONTROL VALVE
Check the following.

EVAP canister vent control valve is installed properly.
Refer to EC-1324, "
Removal and Installation" .

EVAP canister vent control valve.
Refer to EC-1002, "
Component Inspection" .
OK or NG
OK >> GO TO 8.
NG >> Repair or replace EVAP canister vent control valve and O-ring.
8. INSTALL THE PRESSURE PUMP
To locate the EVAP leak, install EVAP service port adapter and pres-
sure pump to EVAP service port securely.
NOTE:
Improper installation of the EVAP service port adapter to the
EVAP service port may cause leaking.
With CONSULT-II>>GO TO 9.
Without CONSULT-II>>GO TO 10.
PBIB1479E
SEF916U

EC-1032
[VK45DE]
DTC P0456 EVAP CONTROL SYSTEM
Revision: 2004 November 2004 FX35/FX45
WITH CONSULT-II
1. Turn ignition switch ON and select “DATA MONITOR” mode with CONSULT-II.
2. Make sure the following conditions are met.
FUEL LEVEL SE: 0.25 - 1.4V
COOLAN TEMP/S: 0 - 32°C (32 - 90°F)
FUEL T/TMP SE: 0 - 35°C (32 - 95°F)
INT A/TEMP SE: More than 0°C (32°F)
If NG, turn ignition switch OFF and leave the vehicle in a cool place (soak the vehicle) or refilling/draining
fuel until the output voltage condition of the “FUEL LEVEL SE” meets within the range above and leave
the vehicle for more than 1 hour. Then start from step 1).
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Turn ignition switch ON.
5. Select “EVAP V/S LEAK P0456/P1456” of “EVAPORATIVE SYSTEM” in “DTC WORK SUPPORT” mode
with CONSULT-II.
Follow the instruction displayed.
6. Make sure that “OK” is displayed.
If “NG” is displayed, refer to EC-1033, "
Diagnostic Procedure" .
NOTE:

If the engine speed cannot be maintained within the range displayed on CONSULT-II screen, go
to EC-733, "
Basic Inspection" .

Make sure that EVAP hoses are connected to EVAP canister purge volume control solenoid
valve properly.
Overall Function CheckABS00C6T
WITH GST
Use this procedure to check the overall function of the EVAP very small leak function. During this check, a 1st
trip DTC might not be confirmed.
CAUTION:

Do not use compressed air, doing so may damage the EVAP system.

Do not start engine.

Do not exceeded 4.12 kPa (0.042 kg/cm2 , 0.6 psi).
1. Attach the EVAP service port adapter securely to the EVAP ser-
vice port.
PBIB0837E
PBIB1479E

EC-1034
[VK45DE]
DTC P0456 EVAP CONTROL SYSTEM
Revision: 2004 November 2004 FX35/FX45
4. CHECK FUEL TANK VACUUM RELIEF VALVE
Refer to EC-1323, "
FUEL TANK VACUUM RELIEF VALVE (BUILT INTO FUEL FULLER CAP)" .
OK or NG
OK >> GO TO 5.
NG >> Replace fuel filler cap with a genuine one.
5. INSTALL THE PRESSURE PUMP
To locate the EVAP leak, install EVAP service port adapter and pres-
sure pump to EVAP service port securely. For the location of EVAP
service port, refer to EC-1321, "
EVAPORATIVE EMISSION LINE
DRAWING" .
NOTE:
Improper installation of the EVAP service port adapter to the EVAP service port may cause leaking.
With CONSULT-II>>GO TO 6.
Without CONSULT-II>>GO TO 7.
PBIB1479E
SEF916U

EC-1040
[VK45DE]
DTC P0460 FUEL LEVEL SENSOR
Revision: 2004 November 2004 FX35/FX45
DTC P0460 FUEL LEVEL SENSORPFP:25060
Component DescriptionABS00C6V
The fuel level sensor is mounted in the fuel level sensor unit. The
sensor detects a fuel level in the fuel tank and transmits a signal to
the “unified meter and A/C amp.”. The “unified meter and A/C amp.”
sends the fuel level sensor signal to the ECM through CAN commu-
nication line.
It consists of two parts, one is mechanical float and the other is vari-
able resistor. Fuel level sensor output voltage changes depending on
the movement of the fuel mechanical float.
On Board Diagnosis LogicABS00C6W
NOTE:
If DTC P0460 is displayed with DTC U1000 or U1001, first perform the trouble diagnosis for DTC U1000,
U1001. Refer to EC-792
.
When the vehicle is parked, naturally the fuel level in the fuel tank is stable. It means that output signal of the
fuel level sensor does not change. If ECM senses sloshing signal from the sensor, fuel level sensor malfunc-
tion is detected.
DTC Confirmation ProcedureABS00C6X
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
WITH CONSULT-II
1. Turn ignition switch ON.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Start engine and wait maximum of 2 consecutive minutes.
4. If 1st trip DTC is detected, go to EC-1041, "
Diagnostic Proce-
dure" .
WITH GST
Follow the procedure “WITH CONSULT-II” above.
PBIB1508E
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0460
0460Fuel level sensor circuit
noiseEven though the vehicle is parked, a signal
being varied is sent from the fuel level sensor
to ECM.

Harness or connectors
(The CAN communication line is open or
shorted)

Harness or connectors
(The sensor circuit is open or shorted)

Unified meter and A/C amp.

Fuel level sensor
SEF195Y

EC-1046
[VK45DE]
DTC P0500 VSS
Revision: 2004 November 2004 FX35/FX45
DTC P0500 VSSPFP:32702
DescriptionABS00C7A
NOTE:
If DTC P0500 is displayed with DTC U1000 or U1001, first perform the trouble diagnosis for DTC U1000,
U1001. Refer to EC-792, "
DTC U1000, U1001 CAN COMMUNICATION LINE" .
The vehicle speed signal is sent to the “unified meter and A/C amp.” from the “ABS actuator and electric unit
(control unit)” by CAN communication line. The “unified meter and A/C amp.” then sends a signal to the ECM
by CAN communication line.
On Board Diagnosis LogicABS00C7B
DTC Confirmation ProcedureABS00C7C
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Steps 1 and 2 may be conducted with the drive wheels lifted in the shop or by driving the vehicle. If a
road test is expected to be easier, it is unnecessary to lift the vehicle.
WITH CONSULT-II
1. Start engine (VDC switch OFF).
2. Read “VHCL SPEED SE” in “DATA MONITOR” mode with CONSULT-II. The vehicle speed on CONSULT-
II should exceed 10 km/h (6 MPH) when rotating wheels with suitable gear position.
If NG, go to EC-1047, "
Diagnostic Procedure" .
If OK, go to following step.
3. Select “DATA MONITOR” mode with CONSULT-II.
4. Warm engine up to normal operating temperature.
5. Maintain the following conditions for at least 60 consecutive sec-
onds.
6. If 1st trip DTC is detected, go to EC-1047, "
Diagnostic Proce-
dure" .
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0500
0500Vehicle speed sensorThe almost 0 km/h (0 MPH) signal from
vehicle speed sensor is sent to ECM
even when vehicle is being driven.

Harness or connectors
(The CAN communication line is open or
shorted)

Harness or connectors
(The vehicle speed signal circuit is open or
shorted)

Wheel sensor

Unified meter and A/C amp.

ABS actuator and electric unit (control unit)
ENG SPEED 1,600 - 6,000 rpm
COOLAN TEMP/S More than 70°C (158°F)
B/FUEL SCHDL More than 4.5 msec
Selector lever Except P or N position
PW/ST SIGNAL OFF
SEF196Y