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Nissan Qashqai J11. Manual - part 556

EC9-380

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

P2626 A/F SENSOR

P2626 A/F SENSOR

DTC Logic

INFOID:0000000010309403

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

PERFORM DIAGNOSIS PROCEDURE

NOTE:
DTC P2626 can not duplicate.

>> Proceed to

EC9-380, "Diagnosis Procedure"

Diagnosis Procedure

INFOID:0000000010309404

CHECK ECM HARNESS CONNECTOR CONNECTIONS

Turn ignition switch OFF.

Check ECM harness connector connection.

Is the inspection result normal?

YES

>> GO TO 2.

>> Repair or replace error-detected parts.

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.

>> Repair or replace error-detected parts.

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.

>> Repair or replace error-detected parts.

CHECK INTERMITTENT INCIDENT

Perform

GI-41, "Intermittent Incident"

Is the inspection result normal?

YES

>> GO TO 5.

>> Repair or replace error-detected parts.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P2626

PROPOR RICH SEN CIRC
(O2 sensor pumping current trim cir-
cuit/open bank 1 sensor 1)
• CO: OPEN CIRCUIT

ECM detects air fuel ratio (A/F) sensor
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

F82

F75

Existed

F83

115

116

119

P2626 A/F SENSOR

EC9-381

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

EC9

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

EC9-382

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

P2681 ENGINE COOLANT BYPASS VALVE

P2681 ENGINE COOLANT BYPASS VALVE

DTC Logic

INFOID:0000000010309405

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 1 minute before conducting the next test.

>> GO TO 2.

PERFORM DTC CONFIRMATION PROCEDURE

Turn ignition switch ON and wait at least 1 second.

Check DTC.

Is DTC detected?

YES

>> Proceed to

EC9-382, "Diagnosis Procedure"

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010309406

CHECK BATTERY VOLTAGE

Check the battery voltage.

Is the inspection result normal?

YES

>> GO TO 2.

>> Perform trouble diagnosis for battery. Refer to

PG-136, "FOR MAINTENANCE REQUIRED BAT-

TERY MODELS : How to Handle Battery"

(for maintenance required battery models) or

PG-142,

"FOR MAINTENANCE FREE BATTERY MODELS : How to Handle Battery"

(for maintenance free

battery models).

CHECK ENGINE COOLANT BYPASS VALVE POWER SUPPLY

Turn ignition switch OFF.

Disconnect engine coolant bypass valve harness connector.

Turn ignition switch ON.

Check the voltage between engine coolant bypass valve harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

>> GO TO 3.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P2681

COOLANT CIRC SWITCH-
ING S/V
(Engine coolant bypass valve
control circuit/open)
• CC.0: SHORT CIRCUIT

TO EARTH

• CC.1: SHORT-CIRCUIT

TO +12V

• CO: OPEN CIRCUIT

• ECM detects engine coolant bypass valve cir-

cuit is short circuit to ground.

• ECM detects engine coolant bypass valve cir-

cuit is short circuit to battery.

• ECM detects engine coolant bypass valve cir-

cuit is open circuit.

• Harness or connectors

(Engine coolant bypass valve con-
trol solenoid valve circuit is open or
shorted.)

• Engine coolant bypass valve

Voltage

Engine coolant bypass valve

Connector

Terminal

F145

Ground

Battery voltage

P2681 ENGINE COOLANT BYPASS VALVE

EC9-383

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

EC9

CHECK ENGINE COOLANT BYPASS VALVE POWER SUPPLY CIRCUIT

Turn ignition switch OFF.

Disconnect IPDM E/R harness connector.

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

Also check harness for short to gound.

Is the inspection result normal?

YES

>> Check IPDM E/R.

>> Repair or replace error-detected parts.

CHECK ENGINE COOLANT BYPASS VALVE CONTROL CIRCUIT

Turn ignition switch OFF.

Disconnect ECM harness connector.

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

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

Is the inspection result normal?

YES

>> GO TO 5.

>> Repair or replace error-detected parts.

CHECK ENGINE COOLANT BYPASS VALVE

Check the engine coolant bypass valve. Refer to

EC9-383, "Component Inspection"

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to

GI-41, "Intermittent Incident"

>> Replace engine coolant bypass valve.

Component Inspection

INFOID:0000000010309407

CHECK ENGINE COOLANT BYPASS VALVE

Turn ignition switch OFF.

Disconnect engine coolant bypass valve harness connector.

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

Is the inspection result normal?

YES

>> INSPECTION END

Continuity

Engine coolant bypass

valve

IPDM E/R

Connector

Terminal

Connector

Terminal

F145

F90

103

Existed

Continuity

Engine coolant bypass

valve

ECM

Connector

Terminal

Connector

Terminal

F145

F82

Existed

Engine coolant bypass valve

Condition

Resistance (

Ω

)

Terminal

Temperature
[

C (

F)]

-40

C (-40

32 - 37

C (73

43 - 49

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