Infiniti EX35. Manual — part 650
EC-342
< COMPONENT DIAGNOSIS >
[VQ35HR]
P0850 PNP SWITCH
4.
Check 1st trip DTC.
Is 1st trip DTC detected?
YES
>> Go to
NO
>> INSPECTION END
5.
PERFORM COMPONENT FUNCTION CHECK
Perform component function check. Refer to
EC-342, "Component Function Check"
NOTE:
Use component function check to check the overall function of the park/neutral position (PNP) signal circuit.
During this check, a 1st trip DTC might not be confirmed.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Go to
Component Function Check
INFOID:0000000003133497
1.
PERFORM COMPONENT FUNCTION CHECK
1.
Turn ignition switch ON.
2.
Check the voltage between ECM harness connector terminals under the following conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Go to
Diagnosis Procedure
INFOID:0000000003133498
1.
CHECK DTC WITH TCM
TM-39, "Diagnosis Description"
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace malfunctioning part.
2.
CHECK STARTING SYSTEM
Turn ignition switch OFF, then turn it to START.
Does starter motor operate?
YES
>> GO TO 3.
NO
>> Check DTC with BCM. Refer to
BCS-16, "COMMON ITEM : CONSULT-III Function (BCM - COM-
3.
CHECK PNP SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Disconnect A/T assembly harness connector.
3.
Disconnect ECM harness connector.
4.
Check the continuity between A/T assembly harness connector and ECM harness connector.
5.
Also check harness for short to ground and short to power.
ECM
Condition
Voltage (V)
Connector
+
–
Terminal
Terminal
M107
109
128
Selector lever
P or N
Battery voltage
Except above
Approx. 0
A/T assembly
ECM
Continuity
Connector
Terminal
Connector
Terminal
F51
9
M107
109
Existed
P0850 PNP SWITCH
EC-343
< COMPONENT DIAGNOSIS >
[VQ35HR]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> GO TO 4.
4.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors F1, E3
• Harness connectors E106, M6
• Harness for open or short between A/T assembly and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
5.
CHECK INTERMITTENT INCIDENT
GI-38, "Intermittent Incident"
.
>> INSPECTION END
EC-344
< COMPONENT DIAGNOSIS >
[VQ35HR]
P1078, P1084 EVT CONTROL POSITION SENSOR
P1078, P1084 EVT CONTROL POSITION SENSOR
Description
INFOID:0000000003133499
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:0000000003133500
DTC DETECTION LOGIC
NOTE:
If DTC P1078 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 turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
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
[EVT control position sensor (bank 1) circuit is
open or shorted)
• Exhaust valve timing control position sensor
• Crankshaft position sensor (POS)
• Camshaft position sensor (PHASE) (bank 1)
• Accumulation of debris to the signal pick-up
portion of the camshaft
P1084
Exhaust valve timing
control position sensor
(bank 2) circuit
• Harness or connectors
[EVT control position sensor (bank 2) circuit is
open or shorted)
[CKP sensor (POS) circuit is shorted.]
[CMP sensor (PHASE) (bank 2) circuit is short-
ed.]
(Battery current sensor circuit is shorted.)
(APP sensor 2 circuit is shorted.)
(EVAP control system pressure sensor circuit
is shorted.)
(Refrigerant pressure sensor circuit is short-
ed.)
• Exhaust valve timing control position sensor
(bank 2)
• Crankshaft position sensor (POS)
• Camshaft position sensor (PHASE) (bank 2)
• Battery current sensor
• Accelerator pedal position sensor
• EVAP control system pressure sensor
• Refrigerant pressure sensor
• Accumulation of debris to the signal pick-up
portion of the camshaft
P1078, P1084 EVT CONTROL POSITION SENSOR
EC-345
< COMPONENT DIAGNOSIS >
[VQ35HR]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
>> 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:0000000003133501
1.
CHECK GROUND CONNECTION
1.
Turn ignition switch OFF.
2.
Check ground connection M95. Refer to Ground Inspection in
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace ground connection.
2.
CHECK EXHAUST VALVE TIMING CONTROL POSITION SENSOR POWER SUPPLY CIRCUIT-I
1.
Disconnect exhaust valve timing control position sensor harness connector.
2.
Turn ignition switch ON.
3.
Check the voltage between exhaust valve timing control position sensor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 8.
NO-1
>> P1078: Repair open circuit or short to ground or short to power in harness or connectors.
NO-2
>> P1084: GO TO 3.
3.
CHECK EXHAUST VALVE TIMING CONTROL POSITION SENSOR POWER SUPPLY CIRCUIT-II
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check the continuity between exhaust valve timing control position sensor harness connector and ECM
harness connector.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair open circuit.
4.
CHECK SENSOR POWER SUPPLY CIRCUIT
Check harness for short to power and short to ground, between the following terminals.
DTC
EVT control position sensor
Ground
Voltage (V)
Bank
Connector
Terminal
P1078
1
F4
1
Ground
Approx. 5
P1084
2
F19
1
EVT control position sensor
ECM
Continuity
Bank
Connector
Terminal
Connector
Terminal
2
F19
1
F102
64
Existed
ECM
Sensor
Connector
Terminal
Name
Connector
Terminal
F101
46
CKP sensor (POS)
F2
1
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