Nissan Altima L32. Manual - part 281

P0145 HO2S3

EC-245

< COMPONENT DIAGNOSIS >

[QR25DE FOR CALIFORNIA]

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Never turn ignition switch OFF.

3. Check 1st trip DTC.
Is 1st trip DTC detected?

YES

>> Go to 

EC-245, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000004349287

1.

CHECK GROUND CONNECTION

1. Turn ignition switch OFF.

2. Check ground connection E9. Refer to Ground Inspection in 

GI-45, "Circuit Inspection"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace ground connection.

2.

CLEAR THE MIXTURE RATIO SELF-LEARNING VALUE

1. Clear the mixture ratio self-learning value. Refer to 

EC-32, "MIXTURE RATIO SELF-LEARNING VALUE

CLEAR : Special Repair Requirement"

.

2. 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

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

EC-254, "DTC Logic"

 or 

EC-258,

"DTC Logic"

.

NO

>> GO TO 3.

3.

CHECK HO2S3 GROUND CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch OFF.

2. Disconnect heated oxygen sensor 3 harness connector.

3. Disconnect ECM harness connector.

4. Check the continuity between HO2S3 harness connector and ECM harness connector.

5. Also check harness for short to ground and short to power.
Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 4.

4.

DETECT MALFUNCTIONING PART

Check the following.

• Harness connectors F58, F101

• Harness for open or short between heated oxygen sensor 3 and ECM

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

5.

CHECK HO2S3 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1. Check the continuity between HO2S3 harness connector and ECM harness connector.

2. Check the continuity between HO2S3 harness connector or ECM harness connector and ground.

HO2S3

ECM

Continuity

Connector

Terminal

Connector

Terminal

F102

1

F13

35

Existed

HO2S3

ECM

Continuity

Connector

Terminal

Connector

Terminal

F102

4

F13

34

Existed

EC-246

< COMPONENT DIAGNOSIS >

[QR25DE FOR CALIFORNIA]

P0145 HO2S3

3. Also check harness for short to power.
Is the inspection result normal?

YES

>> GO TO 7.

NO

>> GO TO 6.

6.

DETECT MALFUNCTIONING PART

Check the following.

• Harness connectors F58, F101

• Harness for open or short between heated oxygen sensor 3 and ECM

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

7.

CHECK HEATED OXYGEN SENSOR 3

Refer to 

EC-246, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> GO TO 8.

8.

REPLACE HEATED OXYGEN SENSOR 3

Replace heated oxygen sensor 3.

CAUTION:

• Discard any 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 sensor, clean exhaust system threads using oxygen sensor thread cleaner

[commercial service tool (J-43897-18 or J-43897-12)] and approved anti-seize lubricant (commercial

service tool).

>> INSPECTION END

9.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-45, "Circuit Inspection"

.

>> INSPECTION END

Component Inspection

INFOID:0000000004349288

1.

INSPECTION START

Do you have CONSULT-III?
Do you have CONSULT-III?

YES

>> GO TO 2.

NO

>> GO TO 3.

2.

CHECK HEATED OXYGEN SENSOR 3

With CONSULT-III

CAUTION:

Always drive vehicle in safe manner according to traffic conditions and obey all traffic laws.

1. Turn ignition switch ON and select “DATA MONITOR” mode with CONSULT-III.

2. Start engine and warm it up to the normal operating temperature.

3. Turn ignition switch OFF and wait at least 10 seconds.

4. Start the engine and drive vehicle at a speed of 80 km/h (50 MPH) or more for at least 3 consecutive min-

utes.

NOTE:

HO2S3

ECM

Ground

Continuity

Connector

Terminal

Connector

Terminal

F102

4

F13

34

Ground

Not existed

P0145 HO2S3

EC-247

< COMPONENT DIAGNOSIS >

[QR25DE FOR CALIFORNIA]

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Keep the vehicle speed as steady as possible during the cruising.

5. Select “FUEL INJECTION” in “ACTIVE TEST” mode, and select “HO2S3 (B1)” as the monitor item with

CONSULT-III.

6. Check “HO2S3 (B1)” at idle speed when adjusting “FUEL INJECTION” to 

±25%.

“HO2S3 (B1)” should be above 0.68V at least once when the “FUEL INJECTION” is +25%.

“HO2S3 (B1)” should be below 0.18V at least once when the “FUEL INJECTION” is 

−25%.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 6.

3.

CHECK HEATED OXYGEN SENSOR 3-I

Without CONSULT-III

CAUTION:

Always drive vehicle in safe manner according to traffic conditions and obey all traffic laws.

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 the engine and drive vehicle at a speed of 80 km/h (50 MPH) or more for at least 3 consecutive min-

utes.

NOTE:

Keep the vehicle speed as steady as possible during the cruising.

4. Check the voltage between ECM harness connector and ground

under the following condition.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 4.

4.

CHECK HEATED OXYGEN SENSOR 3-II

1. Keep vehicle at idling for 10 minutes.

2. Check the voltage between ECM harness connector and ground

under the following condition.

PBIB3458E

ECM

Groun

d

Condition

Voltage

Connec-

tor

Terminal

F13

34

(HO2S3 

signal)

Groun

d

Revving up to 
4,000 rpm un-
der no load at 
least 10 times

The voltage should be above 
0.68 V at least once during this 
procedure.
The voltage should be below 
0.18 V at least once during this 
procedure.

JMBIA1589ZZ

JMBIA1589ZZ

EC-248

< COMPONENT DIAGNOSIS >

[QR25DE FOR CALIFORNIA]

P0145 HO2S3

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 5.

5.

CHECK HEATED OXYGEN SENSOR 3-III

Check the voltage between ECM harness connector and ground

under the following condition.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 6.

6.

REPLACE HEATED OXYGEN SENSOR 3

Replace heated oxygen sensor 3.

CAUTION:

• Discard any 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 sensor, clean exhaust system threads using oxygen sensor thread cleaner

[commercial service tool (J-43897-18 or J-43897-12)] and approved anti-seize lubricant (commercial

service tool).

>> INSPECTION END

ECM

Ground

Condition

Voltage

Connector

Terminal

F13

34

(HO2S3 

signal)

Ground

Revving up to 
4,000 rpm un-
der no load at 
least 10 times

The voltage should be above 
0.68 V at least once during this 
procedure.
The voltage should be below 
0.18 V at least once during this 
procedure.

ECM

Ground

Condition

Voltage

Connector

Terminal

F13

34

(HO2S3 

signal)

Ground

Coasting from 80 
km/h (50 MPH) in 
D position (CVT), 
4th gear position 
(M/T)

The voltage should be 
above 0.68 V at least once 
during this procedure.
The voltage should be be-
low 0.18 V at least once 
during this procedure.

JMBIA1590ZZ