Infiniti G35 (V35) Sedan. Manual — part 502
EC-154
< COMPONENT DIAGNOSIS >
[VQ35HR]
P0075, P0081 IVT CONTROL SOLENOID VALVE
NO
>> GO TO 2.
2.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors E3, F1
• Harness for open or short between intake valve timing control solenoid valve and IPDM E/R
>> Repair open circuit or short to ground or short to power in harness or connectors.
3.
CHECK INTAKE VALVE TIMING CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT FOR OPEN
AND SHORT
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check the continuity between intake valve timing control solenoid valve harness connector and ECM har-
ness connector.
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 or short to ground or short to power in harness or connectors.
4.
CHECK INTAKE VALVE TIMING CONTROL SOLENOID VALVE
EC-154, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Replace malfunctioning intake valve timing control solenoid valve.
5.
CHECK INTERMITTENT INCIDENT
GI-39, "Intermittent Incident"
>> INSPECTION END
Component Inspection
INFOID:0000000000956545
1.
CHECK INTAKE VALVE TIMING CONTROL SOLENOID VALVE-I
1.
Turn ignition switch OFF.
2.
Disconnect intake valve timing control solenoid valve harness connector.
3.
Check resistance between intake valve timing control solenoid valve terminals as follows.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Replace malfunctioning intake valve timing control solenoid valve.
2.
CHECK INTAKE VALVE TIMING CONTROL SOLENOID VALVE-II
1.
Remove intake valve timing control solenoid valve.
DTC
IVT control solenoid valve
ECM
Continuity
Bank
Connector
Terminal
Connector
Terminal
P0075
1
F28
1
F101
18
Existed
P0081
2
F29
1
29
Terminals
Resistance
1 and 2
7.0 - 7.7
Ω
[at 20
°
C (68
°
F)]
1 or 2 and ground
∞
Ω
(Continuity should not exist)
P0075, P0081 IVT CONTROL SOLENOID VALVE
EC-155
< COMPONENT DIAGNOSIS >
[VQ35HR]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
2.
Provide 12V DC between intake valve timing control solenoid
valve terminals 1 and 2, and then interrupt it. Make sure that the
plunger moves as shown in the figure.
CAUTION:
Do not apply 12V DC continuously for 5 seconds or more.
Doing so may result in damage to the coil in intake valve
timing control solenoid valve.
NOTE:
Always replace O-ring when intake valve timing control
solenoid valve is removed.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace malfunctioning intake valve timing control solenoid valve.
JMBIA0079ZZ
EC-156
< COMPONENT DIAGNOSIS >
[VQ35HR]
P0078, P0084 EVT CONTROL MAGNET RETARDER
P0078, P0084 EVT CONTROL MAGNET RETARDER
Description
INFOID:0000000000956546
Exhaust valve timing control magnet retarder (1) controls the shut/
open timing of the exhaust valve by ON/OFF pulse duty signals sent
from the ECM.
The longer pulse width retards valve angle.
The shorter pulse width advances valve angle.
DTC Logic
INFOID:0000000000956547
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 10 seconds before conducting the next test.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Start engine and let it idle for 5 seconds.
2.
Check 1st trip DTC.
Is 1st trip DTC detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000000956548
1.
CHECK EXHAUST VALVE TIMING CONTROL MAGNET RETARDER POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect exhaust valve timing control magnet retarder harness connector.
3.
Turn ignition switch ON.
4.
Check the voltage between exhaust valve timing control magnet retarder harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 2.
JMBIA0024ZZ
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0078
Exhaust valve timing control
magnet retarder (bank 1) circuit
An improper voltage is sent to the ECM
through exhaust valve timing control mag-
net retarder.
• Harness or connectors
(Exhaust valve timing control magnet
retarder circuit is open or shorted.)
• Exhaust valve timing control magnet re-
tarder
P0084
Exhaust valve timing control
magnet retarder (bank 2) circuit
DTC
EVT control magnet retarder
Ground
Voltage
Bank
Connector
Terminal
P0078
1
F32
1
Ground
Battery voltage
P0084
2
F41
1
P0078, P0084 EVT CONTROL MAGNET RETARDER
EC-157
< COMPONENT DIAGNOSIS >
[VQ35HR]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
2.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors E3, F1
• Harness for open or short between exhaust valve timing control magnet retarder and IPDM E/R
>> Repair open circuit or short to ground or short to power in harness or connectors.
3.
CHECK EXHAUST VALVE TIMING CONTROL MAGNET RETARDER OUTPUT SIGNAL CIRCUIT FOR
OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check the continuity between exhaust valve timing control magnet retarder harness connector and ECM
harness connector.
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 or short to ground or short to power in harness or connectors.
4.
CHECK EXHAUST VALVE TIMING CONTROL MAGNET RETARDER
EC-157, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> GO TO 5.
5.
REPLACE EXHAUST VALVE TIMING CONTROL MAGNET RETARDER
1.
Replace malfunctioning exhaust valve timing control magnet retarder.
2.
EC-20, "EXHAUST VALVE TIMING CONTROL LEARNING : Special Repair Requirement"
>> INSPECTION END
6.
CHECK INTERMITTENT INCIDENT
GI-39, "Intermittent Incident"
.
>> INSPECTION END
Component Inspection
INFOID:0000000000956549
1.
CHECK EXHAUST VALVE TIMING CONTROL MAGNET RETARDER
1.
Turn ignition switch OFF.
2.
Disconnect exhaust valve timing control magnet retarder harness connector.
3.
Check resistance between exhaust valve timing control magnet retarder terminals as follows.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> GO TO 2.
2.
REPLACE EXHAUST VALVE TIMING CONTROL MAGNET RETARDER
DTC
EVT control magnet retarder
ECM
Continuity
Bank
Connector
Terminal
Connector
Terminal
P0078
1
F32
2
F101
6
Existed
P0084
2
F41
2
7
Terminals
Resistance
1 and 2
9.0 - 11.0
Ω
[at 20
°
C (68
°
F)]
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