Nissan Qashqai J11. Manual — part 334
P1078 EVT CONTROL POSITION SENSOR
ECM-313
< DTC/CIRCUIT DIAGNOSIS >
[MR20DD]
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P1078 EVT CONTROL POSITION SENSOR
DTC Description
INFOID:0000000010703005
DTC DETECTION LOGIC
POSSIBLE CAUSE
• Harness or connectors
- Exhaust valve timing control position sensor circuit is open or shorted.
- Sensor power supply 2 circuit is shorted.
• Exhaust valve timing control position sensor
• Accumulation of debris to the signal plate of the camshaft
• Sensor power supply 2 circuit
FAIL-SAFE
Not applicable
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure
before conducting the next test.
1.
Turn ignition switch OFF and wait at least 10 seconds.
2.
Turn ignition switch ON.
3.
Turn ignition switch OFF and wait at least 10 seconds.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Start engine and let it idle for 10 seconds.
2.
Check 1st trip DTC.
Is 1st trip DTC detected?
YES
>> Proceed to
ECM-313, "Diagnosis Procedure"
.
NO-1
>> To check malfunction symptom before repair: Refer to
GI-41, "Intermittent Incident"
NO-2
>> Confirmation after repair: INSPECTION END
Diagnosis Procedure
INFOID:0000000010703006
1.
CHECK EXHAUST VALVE TIMING (EVT) CONTROL POSITION SENSOR POWER SUPPLY CIRCUIT-1
1.
Turn ignition switch OFF.
2.
Disconnect exhaust valve timing (EVT) control position sensor harness connector.
3.
Turn ignition switch ON.
4.
Check the voltage between EVT control position sensor harness connector terminals.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> GO TO 2.
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
P1078
EXH TIM SEN/CIRC-B1
(Exhaust timing sensor circuit bank 1)
An excessively high or low voltage from the sensor is sent to ECM.
EVT control position sensor
Voltage
(Approx.)
Connector
+
−
Terminal
F36
1
2
5 V
ECM-314
< DTC/CIRCUIT DIAGNOSIS >
[MR20DD]
P1078 EVT CONTROL POSITION SENSOR
2.
CHECK EXHAUST VALVE TIMING (EVT) CONTROL POSITION SENSOR POWER SUPPLY CIRCUIT-2
Check the voltage between EVT control position sensor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> GO TO 3.
3.
CHECK EXHAUST VALVE TIMING (EVT) CONTROL POSITION SENSOR POWER SUPPLY CIRCUIT-3
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check the continuity between EVT control position sensor harness connector and ECM harness connec-
tor.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace malfunctioning part.
4.
CHECK SENSOR POWER SUPPLY 2 CIRCUIT
Perform
ECM-392, "Diagnosis Procedure"
.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Repair or replace malfunctioning part.
5.
CHECK EVT CONTROL POSITION SENSOR GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check the continuity between EVT control position sensor harness connector and ECM harness connec-
tor.
4.
Also check harness for short to power.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair or replace malfunctioning part.
6.
CHECK ECM GROUND CIRCUIT
Check the continuity between ECM harness connector and ground.
+
−
Voltage
(Approx.)
EVT control position sensor
Connector
Terminal
F36
1
Ground
5 V
+
−
Continuity
EVT control position sensor
ECM
Connector
Terminal
Connector
Terminal
F36
1
F15
24
Existed
+
−
Continuity
EVT control position sensor
ECM
Connector
Terminal
Connector
Terminal
F36
2
F15
42
Existed
P1078 EVT CONTROL POSITION SENSOR
ECM-315
< DTC/CIRCUIT DIAGNOSIS >
[MR20DD]
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ECM
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Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Repair or replace malfunctioning part.
7.
CHECK EVT CONTROL POSITION SENSOR INPUT SIGNAL CIRCUIT
1.
Check the continuity between EVT control position sensor harness connector and ECM harness connec-
tor.
2.
Also check harness for short to power.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Repair or replace malfunctioning part.
8.
CHECK EVT CONTROL POSITION SENSOR
Check the EVT control position sensor. Refer to
ECM-315, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> Replace EVT control position sensor. Refer to
9.
CHECK EXHAUST CAMSHAFT
Check the following.
• Accumulation of debris to the signal plate of camshaft
rear end
• Chipping signal plate of camshaft rear end
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Remove debris and clean the signal plate of cam-
shaftrear end or replace camshaft. Refer to
.
Component Inspection
INFOID:0000000010703007
1.
EXHAUST VALVE TIMING (EVT) CONTROL POSITION SENSOR-1
1.
Turn ignition switch OFF.
2.
Loosen the fixing bolt of the sensor.
3.
Disconnect EVT control position sensor harness connector.
4.
Remove the sensor.
+
–
Continuity
ECM
Connector
Terminal
F15
11
Ground
Existed
E57
123
125
128
+
−
Continuity
EVT control position sensor
ECM
Connector
Terminal
Connector
Terminal
F36
3
F15
46
Existed
PBIA9557J
ECM-316
< DTC/CIRCUIT DIAGNOSIS >
[MR20DD]
P1078 EVT CONTROL POSITION SENSOR
5.
Visually check the sensor for chipping.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Replace EVT control position sensor. Refer to
.
2.
EXHAUST VALVE TIMING (EVT) CONTROL POSITION SENSOR-2
Check the resistance between EVT control position sensor terminals as shown below.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace EVT control position sensor. Refer to
PBIA9876J
EVT control position sensor
Resistance
+
−
Terminal
1
2
Except 0
Ω
[at 25
°
C (77
°
F)]
3
2
3
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