2005 INFINITI FX35 Service Manual

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Page 1633 of 4731

INFINITI FX35 2005 Service Manual EC-240
[VQ35DE]
DTC P0139, P0159 HO2S2
Revision: 2005 July 2005 FX
Wiring DiagramABS006OU
BANK 1
TBWM0292E

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INFINITI FX35 2005 Service Manual DTC P0139, P0159 HO2S2 EC-241
[VQ35DE]
C
D E
F
G H
I
J
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M A
EC
Revision: 2005 July 2005 FX
Specification data are reference values and are measured between each terminal and ground.
C

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INFINITI FX35 2005 Service Manual EC-242
[VQ35DE]
DTC P0139, P0159 HO2S2
Revision: 2005 July 2005 FX
BANK 2
TBWM0293E

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INFINITI FX35 2005 Service Manual DTC P0139, P0159 HO2S2 EC-243
[VQ35DE]
C
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EC
Revision: 2005 July 2005 FX
Specification data are reference values and are measured between each terminal and ground.
C

Page 1637 of 4731

INFINITI FX35 2005 Service Manual EC-244
[VQ35DE]
DTC P0139, P0159 HO2S2
Revision: 2005 July 2005 FX
2. CLEAR THE SELF-LEARNING DATA
With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Select “SEL

Page 1638 of 4731

INFINITI FX35 2005 Service Manual DTC P0139, P0159 HO2S2 EC-245
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Revision: 2005 July 2005 FX
4. CHECK HO2S2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between E

Page 1639 of 4731

INFINITI FX35 2005 Service Manual EC-246
[VQ35DE]
DTC P0139, P0159 HO2S2
Revision: 2005 July 2005 FX
6. Select “FUEL INJECTION” in “ACTIVE TEST” mode, and select
“HO2S2 (B1)/(B2)” as the monitor item with CONSULT-II.
7.

EC-246
[VQ35DE]
DTC P0139, P0159 HO2S2
Revision: 2005 July 2005 FX
6. Select “FUEL INJECTION” in “ACTIVE TEST” mode, and select
“HO2S2 (B1)/(B2)” as the monitor item with CONSULT-II.
7. Check “HO2S2 (B1)/(B2)” at idle speed when adjusting “FUEL INJECTION” to ±25%.
“HO2S2 (B1)/(B2)” should be above 0.78V at least once when the “FUEL INJECTION” is +25%.
“HO2S2 (B1)/(B2)” should be below 0.18V at least once when the “FUEL INJECTION” is −25%.
CAUTION:
Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7
in) onto a hard surface such as a concrete floor; use a new one.
Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread
Cleaner tool J-43897-18 or J-43897-12 and approved anti-seize lubricant.
Without CONSULT-II
1. Start engine and warm it up to the normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.
4. Let engine idle for 1 minute.
5. Set voltmeter probes between ECM terminal 74 [HO2S2 (B1) signal] or 55 [HO2S2 (B2) signal] and ground.
6. Check the voltage when revving up to 4,000 rpm under no load at least 10 times.
(Depress and release accelerator pedal as soon as possible.)
The voltage should be above 0.78V at least once during this
procedure.
If the voltage is above 0.78V at step 6, step 7 is not neces-
sary.
7. Keep vehicle at idling for 10 minutes, then check voltage. Or check the voltage when coasting from 80 km/h (50 MPH) in D
position with “OD” OFF.
The voltage should be below 0.18V at least once during this
procedure.
8. If NG, replace heated oxygen sensor 2.
CAUTION:
Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7
in) onto a hard surface such as a concrete floor; use a new one.
Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread
Cleaner tool J-43897-18 or J-43897-12 and approved anti-seize lubricant.
PBIB1672E
PBIB2163E
PBIB1607E

Page 1640 of 4731

INFINITI FX35 2005 Service Manual DTC P0139, P0159 HO2S2 EC-247
[VQ35DE]
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Revision: 2005 July 2005 FX
Removal and InstallationABS006OX
HEATED OXYGEN SENSOR 2
Refer to EM-26, "EXHAUST MANIFOLD AND

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