Infiniti G35 (V35) Sedan. Manual - part 499

EC-142

< COMPONENT DIAGNOSIS >

[VQ35HR]

P0011, P0021 IVT CONTROL

YES

>> INSPECTION END

NO

>> Replace malfunctioning intake valve timing control solenoid valve.

P0014, P0024 EVT CONTROL

EC-143

< COMPONENT DIAGNOSIS >

[VQ35HR]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

P0014, P0024 EVT CONTROL

DTC Logic

INFOID:0000000000956531

DTC DETECTION LOGIC

NOTE:
• If DTC P0014 or P0024 is displayed with DTC P0078, P0084, P1078 or P1084, first perform trouble

diagnosis for DTC P0078, P0084 or P1078, P1084. Refer to 

EC-156, "DTC Logic"

 or 

EC-346, "DTC

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. 
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is between 10V and 16V at
idle.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE-I

 With CONSULT-III

1.

Turn ignition switch ON and select “DATA MONITOR” mode with CONSULT-III.

2.

Start engine and warm it up to the normal operating temperature.

3.

Maintain the following conditions for at least 6 consecutive seconds.
Hold the accelerator pedal as steady as possible.

CAUTION:

Always drive at a safe speed.

4.

Let engine idle for 10 seconds.

5.

Check 1st trip DTC.

 With GST

Follow the procedure “With CONSULT-III” above.

Is 1st trip DTC detected?

YES

>> Go to 

EC-144, "Diagnosis Procedure"

NO

>> GO TO 3.

3.

PERFORM DTC CONFIRMATION PROCEDURE-II

 With CONSULT-III

DTC No.

Trouble diagnosis 

name

Detecting condition

Possible cause

P0014

Exhaust valve timing 
control performance 
(bank 1)

There is a gap between angle of target and 
phase-control angle degree.

• Crankshaft position sensor (POS)
• Camshaft position sensor (PHASE)
• Exhaust valve timing control position sensor
• Exhaust valve control magnet retarder
• Accumulation of debris to the signal pick-up 

portion of the camshaft

• Timing chain installation
• Exhaust valve timing control pulley assembly

P0024

Exhaust valve timing 
control performance 
(bank 2)

VHCL SPEED SE

100 - 120 km/h (63 - 75 mph)

ENG SPEED

1,200 - 2,000 rpm (A constant rotation is maintained.)

COOLAN TEMP/S

More than 60

°

C (140

°

F)

B/FUEL SCHDL

More than 7.3 msec

Selector lever

D position (A/T)
5th position (M/T)

EC-144

< COMPONENT DIAGNOSIS >

[VQ35HR]

P0014, P0024 EVT CONTROL

1.

Select “DATA MONITOR” mode with CONSULT-III.

2.

Maintain the following conditions for at least 20 consecutive seconds.

CAUTION:

Always drive at a safe speed.

3.

Check 1st trip DTC.

 With GST

Follow the procedure “With CONSULT-III” above.

Is 1st trip DTC detected?

YES

>> Go to 

EC-144, "Diagnosis Procedure"

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000000956532

1.

CHECK FUNCTION OF EXHAUST VALVE TIMING CONTROL

 With CONSULT-III

1.

Turn ignition switch ON.

2.

Select “EXH V/T ANGLE” in “ACTIVE TEST” mode with CONSULT-III.

3.

Start engine and keep the engine speed at 2,500 rpm, then touch “START”.

4.

Make sure that the values of “EXH/V TIM B1” and “EXH/V TIM B2” change when touching “UP” or
“DOWN”.

 Without CONSULT-III

1.

Start engine and rev engine up above 1,500 rpm.

2.

Read the voltage signal between ECM harness connector and ground with an oscilloscope.

Is the inspection result normal?

YES

>> GO TO 10.

NO

>> GO TO 2.

2.

CHECK EXHAUST VALVE TIMING CONTROL MAGNET RETARDER

Refer to 

EC-145, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 3.

3.

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"

.

ENG SPEED

1,700 - 2,950 rpm (A constant rotation is maintained.)

COOLAN TEMP/S

More than 70

°

C (158

°

F)

Selector lever

1st or 2nd position

Driving location uphill

Driving vehicle uphill
(Increased engine load will help maintain the driving 
conditions required for this test.)

ECM

Ground

Voltage signal

Connector

Terminal

F101

6

[EVT control magnet re-

tarder (bank 1) signal]

Ground

7

[EVT control magnet re-

tarder (bank 2) signal]

JMBIA0034GB

P0014, P0024 EVT CONTROL

EC-145

< COMPONENT DIAGNOSIS >

[VQ35HR]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

>> INSPECTION END

4.

CHECK EXHAUST VALVE TIMING CONTROL POSITION SENSOR

Refer to 

EC-350, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace malfunctioning exhaust valve timing control position sensor.

5.

CHECK CRANKSHAFT POSITION SENSOR (POS)

Refer to 

EC-257, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace crankshaft position sensor (POS).

6.

CHECK CAMSHAFT POSITION SENSOR (PHASE)

Refer to 

EC-262, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Replace malfunctioning camshaft position sensor (PHASE).

7.

CHECK CAMSHAFT (EXH)

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

>> GO TO 8.

NO

>> Remove debris and clean the signal plate of camshaft

rear end or replace camshaft.

8.

CHECK TIMING CHAIN INSTALLATION

Check service records for any recent repairs that may cause timing chain misaligned.
Are there any service records that may cause timing chain misaligned?

YES

>> Check timing chain installation. Refer to 

EM-49, "Removal and Installation"

.

NO

>> GO TO 9.

9.

REPLACE EXHAUST VALVE TIMING CONTROL PULLEY ASSEMBLY

1.

Replace exhaust valve timing control pulley assembly and exhaust valve timing control magnet retarder.
Refer to 

EM-49, "Removal and Installation"

 and 

EM-65, "Removal and Installation"

.

2.

Perform 

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

.

>> INSPECTION END

10.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-39, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000000956533

1.

CHECK EXHAUST VALVE TIMING CONTROL MAGNET RETARDER

1.

Turn ignition switch OFF.

2.

Disconnect exhaust valve timing control magnet retarder harness connector.

JMBIA0059ZZ