Nissan Qashqai J11. Manual — part 535
EC9-296
< DTC/CIRCUIT DIAGNOSIS >
[R9M]
P1483 EXHAUST ELECTRIC THROTTLE CONTROL ACTUATOR
2.
Check the voltage between ECM terminals as follows.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace exhaust electric throttle control actuator.
ECM
Voltage
+
-
Terminal
113
117
0.2 – 4.8 V
P1484 LOW PRESSURE EGR VOLUME CONTROL VALVE
EC9-297
< DTC/CIRCUIT DIAGNOSIS >
[R9M]
C
D
E
F
G
H
I
J
K
L
M
A
EC9
N
P
O
P1484 LOW PRESSURE EGR VOLUME CONTROL VALVE
DTC Logic
INFOID:0000000010309287
DTC DETECTION LOGIC
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.
Start engine.
2.
Maintain the following conditions for at least 10 consecutive seconds. Hold the steady as possible.
3.
Check DTC.
Is DTC detected?
YES
>> Proceed to
EC9-297, "Diagnosis Procedure"
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000010309288
1.
CHECK LOW PRESSURE EGR VOLUME CONTROL VALVE
Visually check low 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 DIESEL PARTICULATE FILTER
EC9-359, "Component Inspection"
.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Replace diesel particulate filter.
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 LOW PRESSURE EGR VOLUME CONTROL VALVE HARNESS CONNECTOR CONNECTIONS
Check low pressure EGR volume control valve harness connector connection.
Is the inspection result normal?
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P1484
LOW PRESSURE EGR
VALVE
(Low pressure EGR valve)
• 1.DEF: MECHANICAL
FAULT
ECM detects an incorrect closed position of the low
pressure EGR volume control valve.
• Low pressure EGR volume
control valve clogged
• Low pressure EGR volume
control valve stuck
• Low pressure EGR volume
control valve
ENGINE SPEED
3,500 rpm
EC9-298
< DTC/CIRCUIT DIAGNOSIS >
[R9M]
P1484 LOW PRESSURE EGR VOLUME CONTROL VALVE
YES
>> GO TO 5.
NO
>> Repair or replace error-detected parts.
5.
CHECK LOW PRESSURE EGR VOLUME CONTROL VALVE CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Check low 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 P1484 displayed again?
YES
>> GO TO 7.
NO
>> Check intermittent incident. Refer to
GI-41, "Intermittent Incident"
.
7.
CHECK LOW PRESSURE EGR VOLUME CONTROL VALVE MOTOR
EC9-298, "Component Inspection (Low Pressure EGR Volume Control Valve Motor)"
.
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-41, "Intermittent Incident"
.
NO
>> Replace error-detected parts.
Component Inspection (Low Pressure EGR Volume Control Valve Motor)
INFOID:0000000010309289
1.
CHECK LOW PRESSURE EGR VOLUME CONTROL VALVE MOTOR
1.
Turn ignition switch OFF.
2.
Disconnect low pressure EGR volume control valve harness connector.
3.
Check resistance between low pressure EGR volume control valve terminals as follows.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace low pressure EGR volume control valve.
+
-
Continuity
ECM
Low pressure EGR volume
control valve
Connector
Terminal
Connector
Terminal
F82
55
F77
1
Existed
65
2
69
3
F83
136
6
143
5
Low pressure EGR volume control valve
Condition
Resistance
+
-
Terminal
5
6
Temperature
°
C (
°
F)
20 (68)
1.41
Ω
P1485 LOW PRESSURE EGR VOLUME CONTROL VALVE
EC9-299
< DTC/CIRCUIT DIAGNOSIS >
[R9M]
C
D
E
F
G
H
I
J
K
L
M
A
EC9
N
P
O
P1485 LOW PRESSURE EGR VOLUME CONTROL VALVE
DTC Logic
INFOID:0000000010309290
DTC DETECTION LOGIC
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
EC9-299, "Diagnosis Procedure"
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000010503342
1.
CHECK LOW PRESSURE EGR VOLUME CONTROL VALVE
Visually check low 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 DIESEL PARTICULATE FILTER
EC9-359, "Component Inspection"
.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Replace diesel particulate filter.
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 LOW PRESSURE EGR VOLUME CONTROL VALVE HARNESS CONNECTOR CONNECTIONS
Check low 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 LOW PRESSURE EGR VOLUME CONTROL VALVE CIRCUIT FOR OPEN AND SHORT
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P1485
LOW PRESSURE EGR
VALVE CIRCUIT
(Low pressure EGR valve cir-
cuit)
• 1.DEF: —
• 2.DEF: OPERATION TEM-
PERATURE TOO HIGH
• ECM detects low pressure EGR volume control
valve circuit is short circuit to ground.
• ECM detects low pressure EGR volume control
valve circuit is short circuit to battery.
• Low pressure EGR volume control valve circuit
temperature is too high.
• Harness or connectors
(Low pressure EGR volume control
valve circuit is shorted.)
• Low pressure EGR volume control
valve
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