INFINITI FX35 2004 Service Manual

EC-310
[VQ35DE]
DTC P0340, P0345 CMP SENSOR (PHASE)
Revision: 2004 November 2004 FX35/FX45
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
33 R/LCamshaft position sensor
(PHASE) (bank 1)[Engine is running]

Warm-up condition

Idle speed
NOTE:
The pulse cycle changes depending on rpm at
idle1.0 - 4.0V
[Engine is running]

Engine speed is 2,000 rpm1.0 - 4.0V
PBIB1039E
PBIB1040E

DTC P0340, P0345 CMP SENSOR (PHASE)
EC-311
[VQ35DE]
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Revision: 2004 November 2004 FX35/FX45
BANK 2
TBWM0299E

EC-312
[VQ35DE]
DTC P0340, P0345 CMP SENSOR (PHASE)
Revision: 2004 November 2004 FX35/FX45
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
Diagnostic ProcedureABS00CHH
1. CHECK STARTING SYSTEM
Turn ignition switch to START position.
Ye s o r N o
Yes >> GO TO 2.
No >> Check starting system. (Refer to SC-10, "
STARTING SYSTEM" .)
2. CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground three screws on the body. Refer to EC-141, "
Ground Inspection" .
OK or NG
OK >> GO TO 3.
NG >> Repair or replace ground connections.
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
14 BRCamshaft position sensor
(PHASE) (bank 2)[Engine is running]

Warm-up condition

Idle speed
NOTE:
The pulse cycle changes depending on rpm at
idle1.0 - 4.0V
[Engine is running]

Engine speed is 2,000 rpm1.0 - 4.0V
PBIB1039E
PBIB1040E
Does the engine turn over?
Does the starter motor operate?
PBIB2195E

DTC P0340, P0345 CMP SENSOR (PHASE)
EC-313
[VQ35DE]
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Revision: 2004 November 2004 FX35/FX45
3. CHECK CAMSHAFT POSITION (CMP) SENSOR (PHASE) POWER SUPPLY CIRCUIT
1. Disconnect camshaft position (CMP) sensor (PHASE) harness connector.
2. Turn ignition switch ON.
3. Check voltage between CMP sensor (PHASE) terminal 3 and
ground with CONSULT-II or tester.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.
4. DETECT MALFUNCTIONING PART
Check the following.

Harness connectors E211, M41

Harness connectors F102, M82

Joint connector-3

Harness for open or short between camshaft position sensor (PHASE) and ECM

Harness for open or short between camshaft position sensor (PHASE) and IPDM E/R
>> Repair open circuit or short to ground or short to power in harness or connectors.
5. CHECK CMP SENSOR (PHASE) GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Check harness continuity between CMP sensor (PHASE) terminal 1 and ground.
3. Also check harness for short to power.
OK or NG
OK >> GO TO 7.
NG >> GO TO 6.
6. DETECT MALFUNCTIONING PART
Check the following.

Harness connectors F102, M82

Harness for open or short between CMP sensor (PHASE) and ground
>> Repair open circuit or short to power in harness or connectors. Voltage: Battery voltage
PBIB1568E
SEF481Y
Continuity should exist.

EC-314
[VQ35DE]
DTC P0340, P0345 CMP SENSOR (PHASE)
Revision: 2004 November 2004 FX35/FX45
7. CHECK CMP SENSOR (PHASE) INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 33 or 14 and CMP sensor (PHASE) terminal 2.
Refer to Wiring Diagram.
3. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 8.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
8. CHECK CAMSHAFT POSITION SENSOR (PHASE)
Refer to EC-315, "
Component Inspection" .
OK or NG
OK >> GO TO 9.
NG >> Replace camshaft position sensor (PHASE).
9. CHECK CAMSHAFT (INTAKE)
Check the following.

Accumulation of debris to the signal plate of camshaft rear end

Chipping signal plate of camshaft rear end
OK or NG
OK >> GO TO 10.
NG >> Remove debris and clean the signal plate of camshaft
rear end or replace camshaft.
10. CHECK INTERMITTENT INCIDENT
Refer to EC-135, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END Continuity should exist.
SEC905C

DTC P0340, P0345 CMP SENSOR (PHASE)
EC-315
[VQ35DE]
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Revision: 2004 November 2004 FX35/FX45
Component InspectionABS006QF
CAMSHAFT POSITION SENSOR (PHASE)
1. Loosen the fixing bolt of the sensor.
2. Disconnect camshaft position sensor (PHASE) harness connector.
3. Remove the sensor.
4. Visually check the sensor for chipping.
5. Check resistance as shown in the figure.
Removal and InstallationABS006QG
CAMSHAFT POSITION SENSOR (PHASE)
Refer to EM-82, "CAMSHAFT" .
PBIB0563E
Terminal No. (Polarity) Resistance Ω [at 25°C (77°F)]
1 (+) - 2 (-)
Except 0 or ∞ 1 (+) - 3 (-)
2 (+) - 3 (-)
PBIB0564E

EC-316
[VQ35DE]
DTC P0420, P0430 THREE WAY CATALYST FUNCTION
Revision: 2004 November 2004 FX35/FX45
DTC P0420, P0430 THREE WAY CATALYST FUNCTIONPFP:20905
On Board Diagnosis LogicABS006QH
The ECM monitors the switching frequency ratio of heated oxygen sensors 1 and 2.
A three way catalyst 1 with high oxygen storage capacity will indicate a low switching frequency of heated oxy-
gen sensor 2. As oxygen storage capacity decreases, the heated oxygen sensor 2 switching frequency will
increase.
When the frequency ratio of heated oxygen sensors 1 and 2 approaches a specified limit value, the three way
catalyst 1 malfunction is diagnosed.
DTC Confirmation ProcedureABS006QI
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
TESTING CONDITION:
Do not hold engine speed for more than the specified minutes below.
1. Turn ignition switch ON and select “DATA MONITOR” mode with
CONSULT-II.
2. Start engine and warm it up to the normal operating tempera-
ture.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Start engine and keep the engine speed between 3,500 and
4,000 rpm for at least 1 minute under no load.
5. Let engine idle for 1 minute.
6. Make sure that “COOLAN TEMP/S” indicates more than 70°C
(158°F).
If not, warm up engine and go to next step when “COOLAN
TEMP/S” indication reaches to 70°C (158°F).
7. Open engine hood.
PBIB1166E
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0420
0420
(Bank 1)
Catalyst system effi-
ciency below threshold

Three way catalyst 1 does not operate prop-
erly.

Three way catalyst 1 does not have enough
oxygen storage capacity.

Three way catalyst 1

Exhaust tube

Intake air leaks

Fuel injector

Fuel injector leaks

Spark plug

Improper ignition timing P0430
0430
(Bank 2)
SEF189Y

DTC P0420, P0430 THREE WAY CATALYST FUNCTION
EC-317
[VQ35DE]
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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-318, "
Diagnostic Proce-
dure" .
Overall Function CheckABS006QJ
Use this procedure to check the overall function of the three way catalyst 1. During this check, a 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 35 [HO2S1
(bank 1) signal], 16 [HO2S1 (bank 2) signal] and ground, and
ECM terminals 74 [HO2S2 (bank 1) signal], 55 [HO2S2 (bank 2)
signal] and ground.
6. Keep engine speed at 2,000 rpm constant under no load.
SEF940Z
SEF941Z
SEF535Z
PBIB1107E

EC-318
[VQ35DE]
DTC P0420, P0430 THREE WAY CATALYST FUNCTION
Revision: 2004 November 2004 FX35/FX45
7. Make sure that the voltage switching frequency (high & low)
between ECM terminals 74 and ground, or 55 and ground is
very less than that of ECM terminals 35 and ground, or 16 and
ground.
Switching frequency ratio = A/B
A: Heated oxygen sensor 2 voltage switching frequency
B: Heated oxygen sensor 1 voltage switching frequency
This ratio should be less than 0.75.
If the ratio is greater than above, it means three way catalyst 1
does not operate properly. Go to EC-318, "
Diagnostic Proce-
dure" .
NOTE:
If the voltage at terminal 35 or 16 does not switch periodically more than 5 times within 10 seconds at step 7,
perform trouble diagnosis for DTC P0133, P0153 first. (See EC-214
.)
Diagnostic ProcedureABS006QK
1. CHECK EXHAUST SYSTEM
Visually check exhaust tubes and muffler for dent.
OK or NG
OK >> GO TO 2.
NG >> Repair or replace.
2. CHECK EXHAUST GAS LEAK
1. Start engine and run it at idle.
2. Listen for an exhaust gas leak before the three way catalyst 1.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace.
3. CHECK INTAKE AIR LEAK
Listen for an intake air leak after the mass air flow sensor.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace.
PBIB1108E
PBIB1165E

DTC P0420, P0430 THREE WAY CATALYST FUNCTION
EC-319
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Revision: 2004 November 2004 FX35/FX45
4. CHECK IGNITION TIMING
Check the following items. Refer to EC-83, "
Basic Inspection" .
OK or NG
OK >> GO TO 5.
NG >> Follow the EC-83, "
Basic Inspection" .
5. CHECK INJECTORS
1. Stop engine and then turn ignition switch ON.
2. Check voltage between ECM terminals 21, 22, 23, 40, 41, 42
and ground with CONSULT-II or tester.
Refer to Wiring Diagram for Injectors, EC-598
.
OK or NG
OK >> GO TO 6.
NG >> Perform EC-599, "
Diagnostic Procedure" .
6. CHECK IGNITION SPARK
1. Turn ignition switch OFF.
2. Disconnect ignition coil assembly from rocker cover.
3. Connect a known-good spark plug to the ignition coil assembly.
4. Disconnect all injector harness connectors.
5. Place end of spark plug against a suitable ground and crank engine.
6. Check for spark.
OK or NG
OK >> GO TO 7.
NG >> Check ignition coil with power transistor and their circuit.
Refer to EC-585, "
IGNITION SIGNAL" .
Items Specifications
Target idle speed 650 ± 50 rpm (in P or N position)
Ignition timing 15 ± 5° BTDC (in P or N position)
Battery voltage should exist.
PBIB1172E
SEF575Q