2006 INFINITI M35 Factory Service Manual

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Page 1841 of 5621

INFINITI M35 2006 Factory Service Manual EC-298
[VQ35DE]
DTC P0138, P0158 HO2S2
Revision: 2006 January2006 M35/M45
DTC Confirmation ProcedureNBS004XD
Perform PROCEDURE FOR MALFUNCTION A first.
If DTC cannot be confirmed, perform PROCEDURE FO

EC-298
[VQ35DE]
DTC P0138, P0158 HO2S2
Revision: 2006 January2006 M35/M45
DTC Confirmation ProcedureNBS004XD
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-303, "
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 (158F).
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 voltageA)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

Page 1842 of 5621

INFINITI M35 2006 Factory Service Manual DTC P0138, P0158 HO2S2
EC-299
[VQ35DE]
C
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MA
EC
Revision: 2006 January2006 M35/M45
9. Start engine and following the instruction of CONSULT-II.
NOTE:
It will take at most 10 minutes u

Page 1843 of 5621

INFINITI M35 2006 Factory Service Manual EC-300
[VQ35DE]
DTC P0138, P0158 HO2S2
Revision: 2006 January2006 M35/M45
Wiring DiagramNBS004XF
BANK 1
TBWT0954E

Page 1844 of 5621

INFINITI M35 2006 Factory Service Manual DTC P0138, P0158 HO2S2
EC-301
[VQ35DE]
C
D
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MA
EC
Revision: 2006 January2006 M35/M45
Specification data are reference values and are measured between each terminal and ground.
CAUTION:

Page 1845 of 5621

INFINITI M35 2006 Factory Service Manual EC-302
[VQ35DE]
DTC P0138, P0158 HO2S2
Revision: 2006 January2006 M35/M45
BANK 2
TBWT0955E

Page 1846 of 5621

INFINITI M35 2006 Factory Service Manual DTC P0138, P0158 HO2S2
EC-303
[VQ35DE]
C
D
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F
G
H
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J
K
L
MA
EC
Revision: 2006 January2006 M35/M45
Specification data are reference values and are measured between each terminal and ground.
CAUTION:

Page 1847 of 5621

INFINITI M35 2006 Factory Service Manual EC-304
[VQ35DE]
DTC P0138, P0158 HO2S2
Revision: 2006 January2006 M35/M45
2. CHECK HO2S2 GROUND CIRCUIT FOR OPEN AND SHORT
1. Disconnect heated oxygen sensor 2 harness connector.
2. Disconnect ECM har

Page 1848 of 5621

INFINITI M35 2006 Factory Service Manual DTC P0138, P0158 HO2S2
EC-305
[VQ35DE]
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EC
Revision: 2006 January2006 M35/M45
6. CHECK INTERMITTENT INCIDENT
Refer to EC-165, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT

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