Nissan Maxima. Manual — part 479
EC-400
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
P1078, P1084 EVT CONTROL POSITION SENSOR
P1078, P1084 EVT CONTROL POSITION SENSOR
Description
INFOID:0000000010095084
Exhaust valve timing control position sensor detects the concave
groove of the exhaust camshaft rear end.
This sensor signal is used for sensing a position of the exhaust cam-
shaft.
This sensor uses a Hall IC.
Based on the position of the exhaust camshaft, ECM controls
exhaust valve timing control magnet retarder to optimize the shut/
open timing of exhaust valve for the driving condition.
DTC Logic
INFOID:0000000010095085
DTC DETECTION LOGIC
NOTE:
If DTC P1078 or P1084 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.
Refer to
.
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
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000010095086
Regarding Wiring Diagram information, refer to
.
1.
CHECK GROUND CONNECTION
1. Turn ignition switch OFF.
2. Check ground connection E9. Refer to Ground Inspection in
.
Is the inspection result normal?
YES
>> GO TO 2.
JMBIA0064ZZ
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P1078
Exhaust valve timing
control position sensor
(bank 1) circuit
An excessively high or low voltage from
the sensor is sent to ECM.
• Harness or connectors
(The sensor circuit is open or shorted.)
• Exhaust valve timing (EVT) control position
sensor
• Camshaft (EXH)
• Accumulation of debris to the signal pick-up
portion of the camshaft
P1084
Exhaust valve timing
control position sensor
(bank 2) circuit
P1078, P1084 EVT CONTROL POSITION SENSOR
EC-401
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
NO
>> Repair or replace ground connection.
2.
CHECK EXHAUST VALVE TIMING (EVT) CONTROL POSITION SENSOR POWER SUPPLY CIRCUIT-I
1. Disconnect EVT control position sensor harness connector.
2. Turn ignition switch ON.
3. Check the voltage between EVT control position sensor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair open circuit, short to ground or short to power in harness or connectors.
3.
CHECK EVT CONTROL POSITION SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
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 ground and short to power.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair open circuit, short to ground or short to power in harness or connectors.
4.
CHECK EVT CONTROL POSITION SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check the continuity between EVT control position sensor harness connector and ECM harness connec-
tor.
2. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair open circuit, short to ground or short to power in harness or connectors.
5.
CHECK EVT CONTROL POSITION SENSOR
EC-402, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Replace malfunctioning EVT control position sensor. Refer to
.
6.
CHECK CAMSHAFT (EXH)
Check the following.
DTC
EVT control position sensor
Ground
Voltage (V)
Bank
Connector
Terminal
P1078
1
F43
1
Ground
Approx. 5
P1084
2
F42
1
DTC
EVT control position sensor
ECM
Continuity
Bank
Connector
Terminal
Connector
Terminal
P1078
1
F43
2
F13
64
Existed
P1084
2
F42
2
68
DTC
EVT control position sensor
ECM
Continuity
Bank
Connector
Terminal
Connector
Terminal
P1078
1
F43
3
F13
66
Existed
P1084
2
F42
3
71
EC-402
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
P1078, P1084 EVT CONTROL POSITION SENSOR
• Accumulation of debris to the signal plate of camshaft rear end
• Chipping signal plate of camshaft rear end
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Remove debris and clean the signal plate of camshaft
rear end or replace camshaft. Refer to
.
7.
CHECK INTERMITTENT INCIDENT
GI-41, "Intermittent Incident"
>> INSPECTION END
Component Inspection
INFOID:0000000010095087
1.
EXHAUST VALVE TIMING CONTROL POSITION SENSOR-I
1. Turn ignition switch OFF.
2. Disconnect exhaust valve timing control position sensor harness connector.
3. Loosen the fixing bolt of the sensor.
4. Remove the sensor.
5. Visually check the sensor for chipping.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Replace malfunctioning exhaust valve timing control
position sensor. Refer to
2.
EXHAUST VALVE TIMING CONTROL POSITION SENSOR-II
Check resistance exhaust valve timing control position sensor terminals as shown below.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace malfunctioning exhaust valve timing control position sensor. Refer to
JMBIA0059ZZ
JMBIA0065ZZ
Terminals
Resistance
1 (+) - 2 (-)
Except 0 or
∞ Ω [at 25°C (77°F)]
1 (+) - 3 (-)
2 (+) - 3 (-)
P1148, P1168 CLOSED LOOP CONTROL
EC-403
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
P1148, P1168 CLOSED LOOP CONTROL
DTC Logic
INFOID:0000000010095088
DTC DETECTION LOGIC
NOTE:
DTC P1148 or P1168 is displayed with another DTC for A/F sensor 1.
Perform the trouble diagnosis for the corresponding DTC.
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P1148
Closed loop control
function (bank 1)
The closed loop control function for bank 1 does
not operate even when vehicle is being driven
in the specified condition.
• Harness or connectors
(The sensor circuit is open or shorted.)
• A/F sensor 1
• A/F sensor 1 heater
P1168
Closed loop control
function (bank 2)
The closed loop control function for bank 2 does
not operate even when vehicle is being driven
in the specified condition.
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст