Nissan Quest E52. Manual - part 502

EC-218

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

P0137, P0157 HO2S2

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 3.

3.

PERFORM COMPONENT FUNCTION CHECK-III

Check the voltage between ECM harness connector terminals under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Proceed to 

EC-218, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009651075

1.

CLEAR MIXTURE RATIO SELF-LEARNING VALUE

1.

Clear the mixture ratio self-learning value. Refer to 

EC-139, "Work Procedure"

.

2.

Run engine for at least 10 minutes at idle speed.

Is the 1st trip DTC P0171 or P0174 detected? Is it difficult to start engine?

YES

>> Perform trouble diagnosis for DTC P0171 or P0174. Refer to 

EC-241, "DTC Logic"

.

NO

>> GO TO 2.

2.

CHECK HO2S2 GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect heated oxygen sensor 2 harness connector.

3.

Disconnect ECM harness connector.

4.

Check the continuity between heated oxygen sensor 2 (HO2S2) 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 3.

NO

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

DTC

ECM

Condition

Voltage

Connec-

tor

+

–

Terminal

Terminal

P0137

F8

57

[HO2S2 (bank 1) 

signal]

59

(Sensor 
ground)

Keeping engine at idle for 10 min-
utes

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

P0157

58

[HO2S2 (bank 2) 

signal]

DTC

ECM

Condition

Voltage

Connec-

tor

+

–

Terminal

Terminal

P0137

F8

57

[HO2S2 (bank 1) 

signal]

59

(Sensor 
ground)

Coasting from 80 km/h (50 MPH) 
with selector lever in the D position

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

P0157

58

[HO2S2 (bank 2) 

signal]

DTC

HO2S2

ECM

Continuity

Bank

Connector

Terminal

Connector

Terminal

P0137

1

F72

1

F8

59

Existed

P0157

2

F73

1

P0137, P0157 HO2S2

EC-219

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

3.

CHECK HO2S2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Check the continuity between HO2S2 harness connector and ECM harness connector.

2.

Check the continuity between HO2S2 harness connector and ground, or ECM harness connector and
ground.

3.

Also check harness for short to power.

Is the inspection result normal?

YES

>> GO TO 4.

NO

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

4.

CHECK HEATED OXYGEN SENSOR 2

Check heated oxygen sensor 2. Refer to 

EC-219, "Component Inspection"

.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-42, "Intermittent Incident"

.

NO

>> Replace malfunctioning heated oxygen sensor 2. Refer to 

EM-33, "Exploded View"

.

Component Inspection

INFOID:0000000009651076

1.

INSPECTION START

Will CONSULT be used?

Will CONSULT be used?

YES

>> GO TO 2.

NO

>> GO TO 3.

2.

CHECK HEATED OXYGEN SENSOR 2

With CONSULT

1.

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

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 engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.

5.

Let engine idle for 1 minute.

6.

Select “FUEL INJECTION” in “ACTIVE TEST” mode, and select “HO2S2 (B1)/(B2)” as the monitor item
with CONSULT.

DTC

HO2S2

ECM

Continuity

Bank

Connector

Terminal

Connector

Terminal

P0137

1

F72

4

F8

57

Existed

P0157

2

F73

4

58

DTC

HO2S2

Ground

Continuity

Bank

Connector

Terminal

P0137

1

F72

4

Ground

Not existed

P0157

2

F73

4

DTC

ECM

Ground

Continuity

Connector

Terminal

P0137

F8

57

Ground

Not existed

P0157

58

EC-220

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

P0137, P0157 HO2S2

7.

Check “HO2S2 (B1)/(B2)” at idle speed when adjusting “FUEL INJECTION” to 

±

 25%.

“HO2S2 (B1)/(B2)” should be above 0.68 V at least once when the “FUEL INJECTION” is + 25%.
“HO2S2 (B1)/(B2)” should be below 0.18 V at least once when the “FUEL INJECTION” is 

−

 25%.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace malfunctioning heated oxygen sensor 2. Refer to 

EM-33, "Exploded View"

.

3.

CHECK HEATED OXYGEN SENSOR 2-I

Without CONSULT

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.

Check the voltage between ECM harness connector terminals under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 4.

4.

CHECK HEATED OXYGEN SENSOR 2-II

Check the voltage between ECM harness connector terminals under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 5.

5.

CHECK HEATED OXYGEN SENSOR 2-III

Check the voltage between ECM harness connector terminals under the following conditions.

PBIB3458E

ECM

Condition

Voltage

Connector

+

–

Terminal

Terminal

F8

57

[HO2S2 (bank 1) 

signal]

59

(Sensor 
ground)

Revving up to 4,000 rpm under 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.

58

[HO2S2 (bank 2) 

signal]

ECM

Condition

Voltage

Connector

+

–

Terminal

Terminal

F8

57

[HO2S2 (bank 1) 

signal]

59

(Sensor 
ground)

Keeping engine at idle for 10 minutes

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.

58

[HO2S2 (bank 2) 

signal]

P0137, P0157 HO2S2

EC-221

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace malfunctioning heated oxygen sensor 2. Refer to 

EM-33, "Exploded View"

.

ECM

Condition

Voltage

Connector

+

–

Terminal

Terminal

F8

57

[HO2S2 (bank 1) 

signal]

59

(Sensor 
ground)

Coasting from 80 km/h (50 MPH) with se-
lector lever in the D position

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.

58

[HO2S2 (bank 2) 

signal]