2007 INFINITI FX35 Service Manual

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INFINITI FX35 2007 Service Manual DTC P0138, P0158 HO2S2 EC-953
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Revision: 2006 July 2007 FX35/FX45
DTC Confirmation ProcedureNBS004LD
Perform PROCEDURE FOR MALFUNCTION A first.
If DTC

DTC P0138, P0158 HO2S2 EC-953
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Revision: 2006 July 2007 FX35/FX45
DTC Confirmation ProcedureNBS004LD
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-958, "
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
(The sensor 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
(The sensor 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-954
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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-955
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Revision: 2006 July 2007 FX35/FX45
Wiring DiagramNBS0045Q
BANK 1
TBWM1330E

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INFINITI FX35 2007 Service Manual EC-956
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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-957
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Revision: 2006 July 2007 FX35/FX45
BANK 2
TBWM1331E

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INFINITI FX35 2007 Service Manual EC-958
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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-959
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Revision: 2006 July 2007 FX35/FX45
2. CHECK HO2S2 GROUND CIRCUIT FOR OPEN AND SHORT
1. Disconnect heated oxygen sensor 2

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INFINITI FX35 2007 Service Manual EC-960
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DTC P0138, P0158 HO2S2
Revision: 2006 July 2007 FX35/FX45
4. CHECK HO2S2 CONNECTOR FOR WATER
Check connectors for water.
OK or NG
OK >> GO TO 5.
NG >> Repair or replace harness or c

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