2008 INFINITI FX35 Service Manual

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Page 2073 of 3924

INFINITI FX35 2008 Service Manual
DTC P0137, P0157 HO2S2EC-833
< SERVICE INFORMATION > [VK45DE]
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Wiring DiagramINFOID:0000000001326676
BANK 1
Specification data are reference values
and are measured be

Page 2074 of 3924

INFINITI FX35 2008 Service Manual
EC-834
< SERVICE INFORMATION >[VK45DE]
DTC P0137, P0157 HO2S2
TER-
MI-
NAL
NO. WIRE
COLOR ITEM CONDITION DATA (DC Voltage)
6R Heated oxygen sensor 2
heater (Bank 1) [Engine is running]
Engine sp

Page 2075 of 3924

INFINITI FX35 2008 Service Manual
DTC P0137, P0157 HO2S2EC-835
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BANK 2
Specification data are reference values
and are measured between each terminal and ground.
CAUTIO

Page 2076 of 3924

INFINITI FX35 2008 Service Manual
EC-836
< SERVICE INFORMATION >[VK45DE]
DTC P0137, P0157 HO2S2
Diagnosis Procedure
INFOID:0000000001326677
1.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground

Page 2077 of 3924

INFINITI FX35 2008 Service Manual
DTC P0137, P0157 HO2S2EC-837
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3. Disconnect mass air flow sensor (1) harness connector, and
restart and run engine for at least 5 secon

Page 2078 of 3924

INFINITI FX35 2008 Service Manual
EC-838
< SERVICE INFORMATION >[VK45DE]
DTC P0137, P0157 HO2S2
3. Also check harness for short to power.
OK or NG
OK >> GO TO 5.
NG >> Repair open circuit or short to ground or short to power in harne

EC-838
< SERVICE INFORMATION >[VK45DE]
DTC P0137, P0157 HO2S2
3. Also check harness for short to power.
OK or NG
OK >> GO TO 5.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
5.CHECK HEATED OXYGEN SENSOR 2
Refer to EC-838, "
Component Inspection".
OK or NG
OK >> GO TO 6.
NG >> Replace malfunctioning heated oxygen sensor 2.
6.CHECK INTERMITTENT INCIDENT
Refer to EC-717
.
>> INSPECTION END
Component InspectionINFOID:0000000001326678
HEATED OXYGEN SENSOR 2
With CONSULT-III
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. Select “FUEL INJECTION” in “ACT IVE TEST” mode with CONSULT-III, and select “HO2S2 (B1)/(B2)” as
the monitor item.
6. 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 exh aust system threads using Oxygen Sensor Thread
Cleaner tool J-43897-18 or J-43897-12 and approved anti-seize lubricant.
Without CONSULT-III
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 55 [HO2S2 (B1) signal] or 74\
[HO2S2 (B2) signal] and
ground.Continuity should not exist.
JMBIA0640GB
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

Page 2079 of 3924

INFINITI FX35 2008 Service Manual
DTC P0137, P0157 HO2S2EC-839
< SERVICE INFORMATION > [VK45DE]
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6. Check the voltage when revving up to 4,000 rpm under no load
at least 10 times.
(Depress and release a

Page 2080 of 3924

INFINITI FX35 2008 Service Manual
EC-840
< SERVICE INFORMATION >[VK45DE]
DTC P0138, P0158 HO2S2
DTC P0138, P0158 HO2S2
Component DescriptionINFOID:0000000001326680
The heated oxygen sensor 2, after three way catalyst (manifold),
moni

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