2004 INFINITI FX35 Service Manual

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Page 1385 of 4449

INFINITI FX35 2004 Service Manual EC-44
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BASIC SERVICE PROCEDURE
Revision: 2004 November 2004 FX35/FX45
15. CHECK IGNITION TIMING AGAIN
1. Run engine at idle.
2. Check ignition timing with a timing light.
OK or NG
OK (With CON

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INFINITI FX35 2004 Service Manual BASIC SERVICE PROCEDURE
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19. CHECK HEATED OXYGEN SENSOR 1 (BANK 1) SIGNAL
With CONSULT-II
1. Run engine at about 2,000 r

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INFINITI FX35 2004 Service Manual EC-46
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BASIC SERVICE PROCEDURE
Revision: 2004 November 2004 FX35/FX45
22. CHECK HEATED OXYGEN SENSOR 1 (BANK 2) SIGNAL
Without CONSULT-II
1. Switch the monitored sensor from bank 1 to bank 2.

EC-46
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BASIC SERVICE PROCEDURE
Revision: 2004 November 2004 FX35/FX45
22. CHECK HEATED OXYGEN SENSOR 1 (BANK 2) SIGNAL
Without CONSULT-II
1. Switch the monitored sensor from bank 1 to bank 2. Refer to EC-70, "
How to Switch Monitored Sensor
From Bank 1 to Bank 2 or Vice Versa" .
2. Running engine at 2,000 rpm under no-load (The engine is warmed up to normal operating temperature.),
check that the MIL comes on more than 5 times during 10 seconds.
OK or NG
OK >>INSPECTION END
NG (MIL does not come on)>>GO TO 24.
NG (MIL comes on less than 5 times)>>GO TO 31.
23. CHECK HEATED OXYGEN SENSOR 1 (BANK 1) HARNESS
1. Turn ignition switch OFF and disconnect battery ground cable.
2. Disconnect ECM harness connector.
3. Disconnect heated oxygen sensor 1 (bank 1) harness connector.
4. Check harness continuity between ECM terminal 35 and heated oxygen sensor 1 (bank 1) terminal 1.
Refer to Wiring Diagram, EC-207, "
BANK 1" .
5. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 25.
NG >> 1. Repair or replace harness between ECM and heated oxygen sensor 1 (bank 1).
2. GO TO 4.
24. CHECK HEATED OXYGEN SENSOR 1 (BANK 2) HARNESS
1. Turn ignition switch OFF and disconnect battery ground cable.
2. Disconnect ECM harness connector.
3. Disconnect heated oxygen sensor 1 (bank 2) harness connector.
4. Check harness continuity between ECM terminal 16 and heated oxygen sensor 1 (bank 2) terminal 1.
Refer to Wiring Diagram, EC-209, "
BANK 2" .
5. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 25.
NG >> 1. Repair or replace harness between ECM and heated oxygen sensor 1 (bank 2).
2. GO TO 4.
25. PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING
1. Reconnect ECM harness connector.
2. Perform EC-49, "
Accelerator Pedal Released Position Learning" .
>> GO TO 26.
26. PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
Perform EC-49, "
Throttle Valve Closed Position Learning" .
>> GO TO 27.
Continuity should exist.
Continuity should exist.

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INFINITI FX35 2004 Service Manual BASIC SERVICE PROCEDURE
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27. PERFORM IDLE AIR VOLUME LEARNING
Refer to EC-49, "
Idle Air Volume Learning" .
Is Idle Air V

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INFINITI FX35 2004 Service Manual EC-48
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BASIC SERVICE PROCEDURE
Revision: 2004 November 2004 FX35/FX45
31. REPLACE HEATED OXYGEN SENSOR 1
1. Stop engine.
2. Replace heated oxygen sensor 1 on the malfunctioning bank.
With CONS

Page 1390 of 4449

INFINITI FX35 2004 Service Manual BASIC SERVICE PROCEDURE
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Revision: 2004 November 2004 FX35/FX45
35. ERASE UNNECESSARY DTC
After this inspection, unnecessary DTC might be displayed.
Erase the s

BASIC SERVICE PROCEDURE
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35. ERASE UNNECESSARY DTC
After this inspection, unnecessary DTC might be displayed.
Erase the stored memory in ECM and TCM. Refer to EC-67, "
HOW TO ERASE EMISSION-RELATED DIAG-
NOSTIC INFORMATION" and AT- 3 9 , "HOW TO ERASE DTC" .
>> GO TO 4.
36. CHECK ECM FUNCTION
1. Substitute another known-good ECM to check ECM function. (ECM may be the cause of an incident, but
this is a rare case.)
2. Perform initialization of IVIS (NATS) system and registration of IVIS (NATS) ignition key IDs. Refer to BL-
208, "ECM Re-communicating Function" .
>> GO TO 4.
Accelerator Pedal Released Position LearningABS006KE
DESCRIPTION
Accelerator Pedal Released Position Learning is an operation to learn the fully released position of the accel-
erator pedal by monitoring the accelerator pedal position sensor output signal. It must be performed each time
harness connector of accelerator pedal position sensor or ECM is disconnected.
OPERATION PROCEDURE
1. Make sure that accelerator pedal is fully released.
2. Turn ignition switch ON and wait at least 2 seconds.
3. Turn ignition switch OFF wait at least 10 seconds.
4. Turn ignition switch ON and wait at least 2 seconds.
5. Turn ignition switch OFF wait at least 10 seconds.
Throttle Valve Closed Position LearningABS006KF
DESCRIPTION
Throttle Valve Closed Position Learning is an operation to learn the fully closed position of the throttle valve by
monitoring the throttle position sensor output signal. It must be performed each time harness connector of
electric throttle control actuator or ECM is disconnected.
OPERATION PROCEDURE
1. Make sure that accelerator pedal is fully released.
2. Turn ignition switch ON.
3. Turn ignition switch OFF wait at least 10 seconds.
Make sure that throttle valve moves during above 10 seconds by confirming the operating sound.
Idle Air Volume LearningABS006KG
DESCRIPTION
Idle Air Volume Learning is an operation to learn the idle air volume that keeps each engine within the specific
range. It must be performed under any of the following conditions:
Each time electric throttle control actuator or ECM is replaced.
Idle speed or ignition timing is out of specification.
PREPARATION
Before performing Idle Air Volume Learning, make sure that all of the following conditions are satisfied.
Learning will be cancelled if any of the following conditions are missed for even a moment.
Battery voltage: More than 12.9V (At idle)
Engine coolant temperature: 70 - 100°C (158 - 212°F)
PNP switch: ON
Electric load switch: OFF
(Air conditioner, headlamp, rear window defogger)

Page 1391 of 4449

INFINITI FX35 2004 Service Manual EC-50
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BASIC SERVICE PROCEDURE
Revision: 2004 November 2004 FX35/FX45
On vehicles equipped with daytime light systems, if the parking brake is applied before the engine
is started the headlamp

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INFINITI FX35 2004 Service Manual BASIC SERVICE PROCEDURE
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2. Perform EC-49, "Throttle Valve Closed Position Learning" .
3. Start engine and warm it up to

BASIC SERVICE PROCEDURE
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Revision: 2004 November 2004 FX35/FX45
2. Perform EC-49, "Throttle Valve Closed Position Learning" .
3. Start engine and warm it up to normal operating temperature.
4. Check that all items listed under the topic PREPARATION (previously mentioned) are in good order.
5. Turn ignition switch OFF and wait at least 10 seconds.
6. Confirm that accelerator pedal is fully released, then turn ignition switch ON and wait 3 seconds.
7. Repeat the following procedure quickly five times within 5 seconds.
a. Fully depress the accelerator pedal.
b. Fully release the accelerator pedal.
8. Wait 7 seconds, fully depress the accelerator pedal and keep it for approx. 20 seconds until the MIL stops
blinking and turned ON.
9. Fully release the accelerator pedal within 3 seconds after the MIL turned ON.
10. Start engine and let it idle.
11. Wait 20 seconds.
12. Rev up the engine two or three times and make sure that idle speed and ignition timing are within the
specifications.
13. If idle speed and ignition timing are not within the specification, Idle Air Volume Learning will not be carried
out successfully. In this case, find the cause of the incident by referring to the DIAGNOSTIC PROCE-
DURE below.
DIAGNOSTIC PROCEDURE
If idle air volume learning cannot be performed successfully, proceed as follows:
1.Check that throttle valve is fully closed.
2.Check PCV valve operation.
3.Check that downstream of throttle valve is free from air leakage.
4.When the above three items check out OK, engine component parts and their installation condi-
tion are questionable. Check and eliminate the cause of the incident.
It is useful to perform EC-131, "
TROUBLE DIAGNOSIS - SPECIFICATION VALUE" .
5.If any of the following conditions occur after the engine has started, eliminate the cause of the
incident and perform Idle air volume learning all over again:
Engine stalls.
Erroneous idle.
Fuel Pressure CheckABS006KH
FUEL PRESSURE RELEASE
With CONSULT-II
1. Turn ignition switch ON.
ITEM SPECIFICATION
Idle speed 650±50 rpm (in P or N position)
Ignition timing 15±5° BTDC (in P or N position)
SEC897C

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