Infiniti F50. Manual - part 397

DTC P0133, P0153 HO2S1

EC-229

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EC

5. 

CLEAR THE SELF-LEARNING DATA

 With CONSULT-II

1.

Start engine and warm it up to normal operating temperature.

2.

Select “SELF-LEARNING CONT” in “WORK SUPPORT” mode with CONSULT-II.

3.

Clear the self-learning control coefficient by touching “CLEAR”.

4.

Run engine for at least 10 minutes at idle speed.
Is the 1st trip DTC P0171 or P0172 detected?
Is it difficult to start engine?

 Without CONSULT-II

1.

Start engine and warm it up to normal operating temperature.

2.

Turn ignition switch “OFF”.

3.

Disconnect mass air flow sensor harness connector, and restart
and run engine for at least 5 seconds at idle speed.

4.

Stop engine and reconnect mass air flow sensor harness con-
nector.

5.

Make sure DTC P0102 is displayed.

6.

Erase the DTC memory. Refer to 

EC-63, "HOW TO ERASE

EMISSION-RELATED DIAGNOSTIC INFORMATION"

 .

7.

Make sure DTC P0000 is displayed.

8.

Run engine for at least 10 minutes at idle speed.
Is the 1st trip DTC P0171 or P0172 detected?
Is it difficult to start engine?

Yes or No

Yes

>> Perform trouble diagnosis for DTC P0171 or DTC P0172 (Refer to 

EC-265

  or 

EC-274

 ).

No

>> GO TO 6.

SEF968Y

PBIB0012E

EC-230

DTC P0133, P0153 HO2S1

6. 

CHECK HO2S1 GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch “OFF”.

2.

Disconnect heated oxygen sensor 1 harness connector.

3.

Check harness continuity between HO2S1 terminal 4 and engine ground.
Refer to Wiring Diagram.

4.

Also check harness for short to power.

OK or NG

OK

>> GO TO 7.

NG

>> Repair open circuit or short to power in harness or connectors.

7. 

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 8.

NG

>> Repair open circuit or short to ground or short to power in harness or connectors.

Continuity should exist.

PBIB1250E

DTC

Terminals

Bank

ECM

Sensor

P0133

114

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1

P0153

115

1

2

Continuity should exist.

DTC

Terminals

Bank

ECM

Sensor

P0133

114

1

1

P0153

115

1

2

Continuity should not exist.

DTC P0133, P0153 HO2S1

EC-231

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8. 

CHECK HEATED OXYGEN SENSOR 1 HEATER

Refer to 

EC-162, "Component Inspection"

 .

OK or NG

OK

>> GO TO 9.

NG

>> Replace malfunctioning heated oxygen sensor 1.

9. 

CHECK MASS AIR FLOW SENSOR

Refer to 

EC-177, "Component Inspection"

 .

OK or NG

OK

>> GO TO 10.

NG

>> Replace mass air flow sensor.

10. 

CHECK PCV VALVE

Refer to 

EC-696, "Component Inspection"

 .

OK or NG

OK

>> GO TO 11.

NG

>> Replace PCV valve.

11. 

CHECK HEATED OXYGEN SENSOR 1

Refer to 

EC-231, "Component Inspection"

 .

OK or NG

OK

>> GO TO 12.

NG

>> Replace malfunctioning heated oxygen sensor 1.

12. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-132, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END

Component Inspection

ABS002H1

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 follow-
ing steps.

5.

Touch “RECORD” on CONSULT-II screen.

PBIB2025E

EC-232

DTC P0133, P0153 HO2S1

6.

Check the following.

●

“HO2S1 MNTR (B1)/(B2)” in “DATA MONITOR” mode
changes from “RICH” to “LEAN” to “RICH” more than 5 times
in 10 seconds.
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.

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 114 [HO2S1 (B1) signal] or 115 [HO2S1 (B2) signal] and
engine 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 1 time.

●

The minimum voltage is below 0.3V at least 1 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 

→

 0 -

0.3V

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 Installation

ABS002H2

HEATED OXYGEN SENSOR 1

Refer to 

EM-22, "EXHAUST MANIFOLD AND THREE WAY CATALYST"

 .

SEF647Y

SEF648Y

PBIB0063E