Nissan X-Trail 32. Manual - part 978

P0403 EGR VOLUME CONTROL VALVE

EC-1041

< DTC/CIRCUIT DIAGNOSIS >

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P0403 EGR VOLUME CONTROL VALVE

DTC Description

INFOID:0000000010935720

DTC DETECTION LOGIC

POSSIBLE CAUSE

• Harness or connectors (High Pressure EGR volume control valve command circuit is open or shorted.)
• High Pressure EGR volume control valve

FAIL-SAFE

• EGR valve is closed position
• Throttle control motor is opened
• CSF regenerations forbidden
• CCSL deactivation with dashboard message
• Freeshift inhibited

DTC CONFIRMATION PROCEDURE

1.

CHECK DTC PRIORITY

If DTC P0403 is displayed with DTC P0641, first perform the trouble diagnosis for DTC P0641.

Is applicable DTC detected?

YES

>> Perform diagnosis of applicable. Refer to 

EC-908, "DTC Index"

.

NO

>> GO TO 2.

2.

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 3.

3.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON and wait at least 1 second.

2.

Check DTC.

Is DTC detected?

YES

>> Proceed to 

EC-1041, "Diagnosis Procedure"

.

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-44, "Intermittent Incident"

.

NO-2

>> Confirmation after repair: INSPECTION END

Diagnosis Procedure

INFOID:0000000010935721

1.

CHECK DTC PRIORITY

If DTC P0403 is displayed with DTC P0641, first perform the trouble diagnosis for DTC P0641.

Is applicable DTC detected?

YES

>> Perform diagnosis of applicable. Refer to 

EC-908, "DTC Index"

.

NO

>> GO TO 2.

2.

CHECK HIGH PRESSURE EGR VOLUME CONTROL VALVE

Visually check high pressure EGR volume control valve for chipping.

Is the inspection result normal?

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

P0403

EGR VLV CMD CIRC
(Exhaust gas recirculation “A” control cir-
cuit)
• 1.DEF: —
• 2.DEF: OPERATION TEMPERATURE 

TOO HIGH

• ECM detects high Pressure EGR volume control valve command circuit 

is short to ground.

• ECM detects high Pressure EGR volume control valve command circuit 

is short to power.

• ECM detects an over temperature of high Pressure EGR volume control 

valve.

EC-1042

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

P0403 EGR VOLUME CONTROL VALVE

YES

>> GO TO 3.

NO

>> Repair or replace error-detected parts.

3.

CHECK ECM HARNESS CONNECTOR CONNECTIONS

Check ECM harness connector connection.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace error-detected parts.

4.

CHECK HIGH PRESSURE EGR VOLUME CONTROL VALVE HARNESS CONNECTOR CONNECTIONS

Check high pressure EGR volume control valve harness connector connection.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace error-detected parts.

5.

CHECK HIGH PRESSURE EGR VOLUME CONTROL VALVE CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Check high pressure EGR volume control valve circuit for open and short.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace error-detected parts.

6.

DTC CONFIRMATION PROCEDURE

1.

Erase DTC.

2.

Perform DTC confirmation procedure again. Refer to 

EC-1041, "DTC Description"

.

Is the DTC P0403 displayed again?

YES

>> GO TO 7.

NO

>> INSPECTION END

7.

CHECK HIGH PRESSURE EGR VOLUME CONTROL VALVE MOTOR

Refer to 

EC-1042, "Component Inspection (High Pressure EGR Volume Control Valve Motor)"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace error-detected parts. 

Component Inspection (High Pressure EGR Volume Control Valve Motor)

INFOID:0000000010935722

1.

CHECK HIGH PRESSURE EGR VOLUME CONTROL VALVE MOTOR

1.

Turn ignition switch OFF.

2.

Disconnect high pressure EGR volume control valve harness connector.

3.

Check resistance between high pressure EGR volume control valve terminals as follows.

+

-

Continuity

ECM

High pressure EGR volume 

control valve

Connector

Terminal

Connector

Terminal

F118

144

F156

1

Existed

148

2

High pressure EGR volume 

control valve

Resistance (Approx.)

+

-

Terminal

1

2

2.35 

Ω

P0403 EGR VOLUME CONTROL VALVE

EC-1043

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

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Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace high pressure EGR volume control valve.

EC-1044

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

P0409 EGR VOLUME CONTROL VALVE POSITION SENSOR

P0409 EGR VOLUME CONTROL VALVE POSITION SENSOR

DTC Description

INFOID:0000000010935723

DTC DETECTION LOGIC

POSSIBLE CAUSE

• Harness or connectors (High pressure EGR volume control valve control position sensor circuit is open or

shorted.)

• High pressure EGR volume control valve control position sensor

FAIL-SAFE

• EGR valve is closed position
• Stop closed-loop control
• CSF regeneration forbidden
• CCSL deactivation with dashboard message
• Freeshift inhibited

DTC CONFIRMATION PROCEDURE

1.

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.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON and wait at least 1 second.

2.

Check DTC.

Is DTC detected?

YES

>> Proceed to 

EC-1044, "Diagnosis Procedure"

.

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-44, "Intermittent Incident"

.

NO-2

>> Confirmation after repair: INSPECTION END

Diagnosis Procedure

INFOID:0000000010935724

1.

CHECK HIGH PRESSURE EGR VOLUME CONTROL VALVE

Visually check high pressure EGR volume control valve for chipping.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace error-detected parts.

2.

CHECK ECM HARNESS CONNECTOR CONNECTIONS

Check ECM harness connector connection.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace error-detected parts.

3.

CHECK HIGH PRESSURE EGR VOLUME CONTROL VALVE HARNESS CONNECTOR CONNECTIONS

Check high pressure EGR volume control valve harness connector connection.
Is the inspection result normal?

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

P0409

EGR VALVE POSITION SEN CIRC
(Exhaust gas recirculation sensor “A” cir-
cuit)
• 1.DEF: SIGNAL INCOHERENCE

• A Voltage of high Pressure EGR volume control valve position sensor re-

mains more than 4.5 V.

• A Voltage of high Pressure EGR volume control valve position sensor re-

mains less than 0.5 V.