Nissan X-Trail 32. Manual - part 1018

 

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Nissan X-Trail 32. Manual - part 1018

 

 

P2681 ENGINE COOLANT BYPASS VALVE

EC-1201

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 3.

3.

CHECK ENGINE COOLANT BYPASS VALVE POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF. 

2.

Disconnect IPDM E/R harness connector.

3.

Check the continuity between engine coolant bypass valve harness connector and IPDM E/R harness
connector.

4.

Also check harness for short to gound.

Is the inspection result normal?

YES

>> Check IPDM E/R.

NO

>> Repair or replace error-detected parts.

4.

CHECK ENGINE COOLANT BYPASS VALVE CONTROL CIRCUIT

1.

Turn ignition switch OFF. 

2.

Disconnect ECM harness connector.

3.

Check the continuity between engine coolant bypass valve harness connector and ECM harness connec-
tor.

4.

Also check harness for short to power and short to ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace error-detected parts.

5.

CHECK ENGINE COOLANT BYPASS VALVE

Check the engine coolant bypass valve. Refer to 

EC-1201, "Component Inspection"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace engine coolant bypass valve.

Component Inspection

INFOID:0000000010935909

1.

CHECK ENGINE COOLANT BYPASS VALVE

1.

Turn ignition switch OFF.

2.

Disconnect engine coolant bypass valve harness connector.

3.

Check the resistance between engine coolant bypass valve as per the following conditions.

+

-

Voltage

Engine coolant bypass valve

Connector

Terminal

F160

2

Ground

Battery voltage

+

-

Continuity

Engine coolant bypass 

valve

IPDM E/R

Connector

Terminal

Connector

Terminal

F160

2

F72

73

Existed

+

-

Continuity

Engine coolant bypass 

valve

ECM

Connector

Terminal

Connector

Terminal

F160

1

F117

53

Existed

EC-1202

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

P2681 ENGINE COOLANT BYPASS VALVE

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace engine coolant bypass valve.

Engine coolant bypass valve

Condition

Resistance (

)

+

-

Terminal

1

2

Temperature 
[

°

C (

°

F)]

-40 

°

C (-40 

°

F)

32 - 37

23 

°

C (73 

°

F)

43 - 49

P2A06 A/F SENSOR

EC-1203

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

P2A06 A/F SENSOR

DTC Description

INFOID:0000000010935910

DTC DETECTION LOGIC

POSSIBLE CAUSE

• Harness or connectors (A/F sensor circuit is open.)
• A/F sensor 

FAIL-SAFE

Not applicable

DTC CONFIRMATION PROCEDURE

1.

PERFORM DIAGNOSIS PROCEDURE

NOTE:
DTC P2A06 can not duplicate. 

>> Proceed to 

EC-1203, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000010935911

1.

CHECK ECM HARNESS CONNECTOR CONNECTIONS

1.

Turn ignition switch OFF.

2.

Check ECM harness connector connection.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace error-detected parts.

2.

CHECK AIR FUEL RATIO (A/F) SENSOR HARNESS CONNECTOR CONNECTIONS

Check A/F sensor harness connector connection.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace error-detected parts.

3.

CHECK A/F SENSOR CIRCUIT FOR OPEN AND SHORT

Check A/F sensor circuit for open and short.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace error-detected parts.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

P2A06

PROPOR RICH SEN CIRC
(O2 sensor negative voltage bank 1 sensor 
1)
• CO: OPEN CIRCUIT

ECM detects air fuel ratio (A/F) sensor ground circuit is open circuit.

+

-

Continuity

ECM

A/F sensor

Connector

Terminal

Connector

Terminal

F117

89

F166

3

Existed

F118

115

6

116

2

119

1

EC-1204

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

P2A06 A/F SENSOR

4.

CHECK INTERMITTENT INCIDENT

Perform 

GI-44, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace error-detected parts.

5.

REPLACE A/F SENSOR

Replace A/F sensor.

CAUTION:

• Discard any A/F 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 A/F sensor, clean exhaust system threads using Heated Oxygen Sensor

Thread Cleaner tool and approved anti-seize lubricant.

>> INSPECTION END

 

 

 

 

 

 

 

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