Nissan Qashqai J11. Manual - part 557

EC9-384

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

P2681 ENGINE COOLANT BYPASS VALVE

NO

>> Replace engine coolant bypass valve.

P2A06 A/F SENSOR

EC9-385

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

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EC9

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P2A06 A/F SENSOR

DTC Logic

INFOID:0000000010309408

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DIAGNOSIS PROCEDURE

NOTE:
DTC P2A06 can not duplicate. 

>> Proceed to 

EC9-385, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000010309409

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.

4.

CHECK INTERMITTENT INCIDENT

Perform 

GI-41, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace error-detected parts.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

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.

• Harness or connectors

(A/F sensor circuit is open.)

• A/F sensor 

+

-

Continuity

ECM

A/F sensor

Connector

Terminal

Connector

Terminal

F83

89

F75

3

Existed

115

6

116

2

119

1

EC9-386

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

P2A06 A/F SENSOR

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

LOW PRESSURE FUEL PUMP

EC9-387

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

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LOW PRESSURE FUEL PUMP

Component Function Check

INFOID:0000000010500944

1.

CHECK FUEL PUMP FUNCTION

1.

Turn ignition switch ON.

2.

Pinch fuel feed hose with two fingers.
NOTE:
Fuel pressure pulsation should be felt on the fuel feed hose for 1 second after ignition switch is turned ON.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>>

EC9-387, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000010500945

1.

CHECK FPCM POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect FPCM harness connector.

3.

Turn ignition switch ON.

4.

Check the voltage between FPCM harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Perform the trouble diagnosis for power supply circuit. Refer to 

EC9-163, "ECM : Diagnosis Pro-

cedure"

.

2.

CHECK FPCM GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Check the continuity between FPCM harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

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

3.

CHECK FPCM INPUT AND OUTPUT CIRCUIT

1.

Disconnect ECM harness connector.

2.

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

3.

Also check harness for short to ground and to power.

+

−

Voltage

FPCM

Connector

Terminal

B75

8

Ground

Battery voltage

+

−

Continuity

FPCM

Connector

Terminal

B76

7

Ground

Existed

+

−

Continuity

FPCM

ECM

Connector

Terminal

Connector

Terminal

B77

9

E58

13

Existed

10

11