2007 INFINITI FX35 Service Manual

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INFINITI FX35 2007 Service Manual DTC P0138, P0158 HO2S2 EC-281
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Revision: 2006 July 2007 FX35/FX45
DTC Confirmation ProcedureNBS004M9
Perform PROCEDURE FOR MALFUNCTION A first.
If DTC

DTC P0138, P0158 HO2S2 EC-281
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Revision: 2006 July 2007 FX35/FX45
DTC Confirmation ProcedureNBS004M9
Perform PROCEDURE FOR MALFUNCTION A first.
If DTC cannot be confirmed, perform PROCEDURE FOR MALFUNCTION B.
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.
PROCEDURE FOR MALFUNCTION A
With CONSULT-II
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 2 minutes.
6. If 1st trip DTC is detected, go to EC-281, "
PROCEDURE FOR
MALFUNCTION A" .
With GST
Follow the procedure “With CONSULT-II” above.
PROCEDURE FOR MALFUNCTION B
With CONSULT-II
TESTING CONDITION:
For better results, perform “DTC WORK SUPPORT” at a temperature of 0 to 30 °C (32 to 86 °F).
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.
8. Select “HO2S2 (B1) P1146” (for DTC P0138) or “HO2S2 (B2) P1166” (for DTC P0158) of “HO2S2” in “DTC WORK SUPPORT” mode with CONSULT-II.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0138
0138
(Bank 1)
Heated oxygen sensor
2 circuit high voltage A)
An excessively high voltage from the sen-
sor is sent to ECM.
Harness or connectors
(Heated oxygen sensor 2 circuit is
open or shorted)
Heated oxygen sensor 2
P0158
0158
(Bank 2) B)
The minimum voltage from the sensor is
not reached to the specified voltage.
Harness or connectors
(Heated oxygen sensor 2 circuit is
open or shorted)
Heated oxygen sensor 2
Fuel pressure
Fuel injector
SEF174Y
SEF174Y

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INFINITI FX35 2007 Service Manual EC-282
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DTC P0138, P0158 HO2S2
Revision: 2006 July 2007 FX35/FX45
9. Start engine and following the instruction of CONSULT-II.
NOTE:
It will take at most 10 minutes until “COMPLETED” is

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INFINITI FX35 2007 Service Manual DTC P0138, P0158 HO2S2 EC-283
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Revision: 2006 July 2007 FX35/FX45
Wiring DiagramNBS003OR
BANK 1
TBWM1592E

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INFINITI FX35 2007 Service Manual EC-284
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DTC P0138, P0158 HO2S2
Revision: 2006 July 2007 FX35/FX45
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground te

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INFINITI FX35 2007 Service Manual DTC P0138, P0158 HO2S2 EC-285
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Revision: 2006 July 2007 FX35/FX45
BANK 2
TBWM1593E

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INFINITI FX35 2007 Service Manual EC-286
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DTC P0138, P0158 HO2S2
Revision: 2006 July 2007 FX35/FX45
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground te

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INFINITI FX35 2007 Service Manual DTC P0138, P0158 HO2S2 EC-287
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Revision: 2006 July 2007 FX35/FX45
2. CHECK HEATED OXYGEN SENSOR 2 GROUND CIRCUIT FOR OPEN AND SHORT
1. Disconnect heate

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INFINITI FX35 2007 Service Manual EC-288
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DTC P0138, P0158 HO2S2
Revision: 2006 July 2007 FX35/FX45
6. CHECK INTERMITTENT INCIDENT
Refer to EC-147, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>> INSPECTION END
PROCED

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