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

Refer to 

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

Refer to 

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 

EC-156, "Diagnosis Procedure"

.

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

Refer to 

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.

Perform 

EC-20, "EXHAUST VALVE TIMING CONTROL LEARNING : Special Repair Requirement"

.

>> INSPECTION END

6.

CHECK INTERMITTENT INCIDENT

Refer to 

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)]