Nissan X-Trail 32. Manual — part 978
P0403 EGR VOLUME CONTROL VALVE
EC-1041
< DTC/CIRCUIT DIAGNOSIS >
[R9M]
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EC
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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
.
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
.
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
.
Is the DTC P0403 displayed again?
YES
>> GO TO 7.
NO
>> INSPECTION END
7.
CHECK HIGH PRESSURE EGR VOLUME CONTROL VALVE MOTOR
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]
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 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.
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