2006 INFINITI M35 Factory Service Manual

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Page 2561 of 5621

INFINITI M35 2006 Factory Service Manual EC-1018
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DTC P0137, P0157 HO2S2
Revision: 2006 January2006 M35/M45
5. CHECK HEATED OXYGEN SENSOR 2
Refer to EC-1018, "
Component Inspection" .
OK or NG
OK >> GO TO 6.
NG >> Replace mal

Page 2562 of 5621

INFINITI M35 2006 Factory Service Manual DTC P0137, P0157 HO2S2
EC-1019
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Revision: 2006 January2006 M35/M45
Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread
Cleane

Page 2563 of 5621

INFINITI M35 2006 Factory Service Manual EC-1020
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DTC P0138, P0158 HO2S2
Revision: 2006 January2006 M35/M45
DTC P0138, P0158 HO2S2PFP:226A0
Component DescriptionNBS005ER
The heated oxygen sensor 2, after three way catalyst (

Page 2564 of 5621

INFINITI M35 2006 Factory Service Manual DTC P0138, P0158 HO2S2
EC-1021
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DTC Confirmation ProcedureNBS005EU
Perform PROCEDURE FOR MALFUNCTION A first.
If DTC cannot be conf

DTC P0138, P0158 HO2S2
EC-1021
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DTC Confirmation ProcedureNBS005EU
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-1026, "
Diagnostic Proce-
dure" .
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 2565 of 5621

INFINITI M35 2006 Factory Service Manual EC-1022
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DTC P0138, P0158 HO2S2
Revision: 2006 January2006 M35/M45
9. Start engine and following the instruction of CONSULT-II.
NOTE:
It will take at most 10 minutes until “COMPLETED” is d

Page 2566 of 5621

INFINITI M35 2006 Factory Service Manual DTC P0138, P0158 HO2S2
EC-1023
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Revision: 2006 January2006 M35/M45
Wiring DiagramNBS005EW
BANK 1
TBWT1020E

Page 2567 of 5621

INFINITI M35 2006 Factory Service Manual EC-1024
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DTC P0138, P0158 HO2S2
Revision: 2006 January2006 M35/M45
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground ter

Page 2568 of 5621

INFINITI M35 2006 Factory Service Manual DTC P0138, P0158 HO2S2
EC-1025
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Revision: 2006 January2006 M35/M45
BANK 2
TBWT1021E

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