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EC-228
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DTC P0134, P0154 HO2S1
Revision: 2004 November 2004 FX35/FX45
Overall Function CheckABS006OC
Use this procedure to check the overall function of the heated oxygen sensor 1 circuit. During this check, a
DTC might not be confirmed.
WITH GST
1. Start engine and warm it up to normal operating temperature.
2. Set voltmeter probes between ECM terminal 35 [HO2S1 (B1) signal] or 16 [HO2S1 (B2) signal] and
ground.
3. Check the following with engine speed held at 2,000 rpm con-
stant under no load.
–The voltage does not remain in the range of 0.2 to 0.4V.
4. If NG, go to EC-232, "
Diagnostic Procedure" .
PBIB1107E
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DTC P0134, P0154 HO2S1
EC-229
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Wiring DiagramABS006OD
BANK 1
TBWM0290E
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EC-230
[VQ35DE]
DTC P0134, P0154 HO2S1
Revision: 2004 November 2004 FX35/FX45
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
35 BRHeated oxygen sensor 1
(bank 1)[Engine is running]
Warm-up condition
Engine speed is 2,000 rpm0 - Approximately 1.0V
(Periodically change)
78 B/RSensor ground
(Heated oxygen sensor)[Engine is running]
Warm-up condition
Idle speedApproximately 0V
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DTC P0134, P0154 HO2S1
EC-231
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Revision: 2004 November 2004 FX35/FX45
BANK 2
TBWM0291E
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EC-232
[VQ35DE]
DTC P0134, P0154 HO2S1
Revision: 2004 November 2004 FX35/FX45
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
Diagnostic ProcedureABS006OE
1. CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground three screws on the body. Refer to EC-141, "
Ground Inspection" .
OK or NG
OK >> GO TO 2.
NG >> Repair or replace ground connections.
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
16 R/LHeated oxygen sensor 1
(bank 2)[Engine is running]
Warm-up condition
Engine speed is 2,000 rpm0 - Approximately 1.0V
(Periodically change)
78 B/RSensor ground
(Heated oxygen sensor)[Engine is running]
Warm-up condition
Idle speedApproximately 0V
PBIB2195E
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![INFINITI FX35 2004 Service Manual DTC P0134, P0154 HO2S1
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2. CHECK HO2S1 GROUND CIRCUIT FOR OPEN AND SHORT
1. Disconnect heated oxygen sensor 1 harness co INFINITI FX35 2004 Service Manual DTC P0134, P0154 HO2S1
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2. CHECK HO2S1 GROUND CIRCUIT FOR OPEN AND SHORT
1. Disconnect heated oxygen sensor 1 harness co](/manual-img/42/57021/w960_57021-1573.png)
DTC P0134, P0154 HO2S1
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2. CHECK HO2S1 GROUND CIRCUIT FOR OPEN AND SHORT
1. Disconnect heated oxygen sensor 1 harness connector.
2. Disconnect ECM harness connector.
3. Check harness continuity between HO2S1 terminal 4 and ECM terminal 78.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 3.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
3. CHECK HO2S1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal and HO2S1 terminal as follows.
Refer to Wiring Diagram.
3. Check harness continuity between the following terminals and ground.
Refer to Wiring Diagram.
4. Also check harness for short to power.
OK or NG
OK >> GO TO 4.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.Continuity should exist.
PBIB1559E
DTCTe r m i n a l s
Bank
ECM Sensor
P0134 35 1 1
P0154 16 1 2
Continuity should exist.
DTCTe r m i n a l s
Bank
ECM Sensor
P0134 35 1 1
P0154 16 1 2
Continuity should not exist.
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![INFINITI FX35 2004 Service Manual EC-234
[VQ35DE]
DTC P0134, P0154 HO2S1
Revision: 2004 November 2004 FX35/FX45
4. CHECK HEATED OXYGEN SENSOR 1
Refer to EC-234, "
Component Inspection" .
OK or NG
OK >> GO TO 5.
NG >> Replace malfuncti INFINITI FX35 2004 Service Manual EC-234
[VQ35DE]
DTC P0134, P0154 HO2S1
Revision: 2004 November 2004 FX35/FX45
4. CHECK HEATED OXYGEN SENSOR 1
Refer to EC-234, "
Component Inspection" .
OK or NG
OK >> GO TO 5.
NG >> Replace malfuncti](/manual-img/42/57021/w960_57021-1574.png)
EC-234
[VQ35DE]
DTC P0134, P0154 HO2S1
Revision: 2004 November 2004 FX35/FX45
4. CHECK HEATED OXYGEN SENSOR 1
Refer to EC-234, "
Component Inspection" .
OK or NG
OK >> GO TO 5.
NG >> Replace malfunctioning heated oxygen sensor 1.
5. CHECK INTERMITTENT INCIDENT
Refer to EC-135, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionABS006OF
HEATED OXYGEN SENSOR 1
With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Select “MANU TRIG” and adjust “TRIGGER POINT” to 100% in “DATA MONITOR” mode with CONSULT-
II.
3. Select “HO2S1 (B1)/(B2)” and “HO2S1 MNTR (B1)/(B2)”.
4. Hold engine speed at 2,000 rpm under no load during the following steps.
5. Touch “RECORD” on CONSULT-II screen.
6. Check the following.
“HO2S1 MNTR (B1)/(B2)” in “DATA MONITOR” mode
changes from “RICH” to “LEAN” to “RICH” 5 times in 10 sec-
onds.
5 times (cycles) are counted as shown at right.
“HO2S1 (B1)/(B2)” voltage goes above 0.6V at least once.
“HO2S1 (B1)/(B2)” voltage goes below 0.3V at least once.
“HO2S1 (B1)/(B2)” voltage never exceeds 1.0V.
SEF646Y
SEF647Y
SEF648Y
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CAUTION:
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CAUTION:
Discard any heated oxygen sensor which has been dropped from a height of more than 0.5](/manual-img/42/57021/w960_57021-1575.png)
DTC P0134, P0154 HO2S1
EC-235
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Revision: 2004 November 2004 FX35/FX45
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 normal operating temperature.
2. Set voltmeter probes between ECM terminal 35 [HO2S1 (B1) signal] or 16 [HO2S1 (B2) signal] and
ground.
3. Check the following with engine speed held at 2,000 rpm con-
stant under no load.
The voltage fluctuates between 0 to 0.3V and 0.6 to 1.0V
more than 5 times within 10 seconds.
The maximum voltage is over 0.6V at least one time.
The minimum voltage is below 0.3V at least one time.
The voltage never exceeds 1.0V.
1 time: 0 - 0.3V → 0.6 - 1.0V → 0 - 0.3V
2 times: 0 - 0.3V → 0.6 - 1.0V → 0 - 0.3V → 0.6 - 1.0V
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.
Removal and InstallationABS006OG
HEATED OXYGEN SENSOR 1
Refer to EM-26, "EXHAUST MANIFOLD AND THREE WAY CATALYST" .
PBIB1107E