Nissan X-Trail 32. Manual - part 765

P0075 IVT CONTROL SOLENOID VALVE

EC-189

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

2.

CHECK INTAKE VALVE TIMING CONTROL SOLENOID VALVE-2

1.

Remove intake valve timing control solenoid valve.

2.

Provide battery voltage between intake valve timing control sole-
noid valve terminals 1 and 2, and then interrupt it. Check that the
plunger moves as shown in the figure. 

CAUTION:

Never apply battery voltage 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. Refer to 

EM-67, "Exploded

View"

.

JMBIA0097ZZ

EC-190

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

P0078 EVT CONTROL SOLENOID VALVE

P0078 EVT CONTROL SOLENOID VALVE

DTC Description

INFOID:0000000010775119

DTC DETECTION LOGIC

POSSIBLE CAUSE

• Harness or connectors
- Exhaust valve timing control solenoid valve circuit is open or shorted.
- Sensor power supply circuit 2 is shorted.
• Exhaust valve timing control solenoid valve
• Sensor power supply circuit 2 sensor

FAIL-SAFE

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 at least 5 seconds.

2.

Check 1st trip DTC.

Is 1st trip DTC detected?

YES

>> Proceed to 

EC-190, "Diagnosis Procedure"

.

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-44, "Intermittent Incident"

.

NO-2

>> Confirmation after repair: INSPECTION END

Diagnosis Procedure

INFOID:0000000010775120

1.

CHECK EXHAUST VALVE TIMING CONTROL SOLENOID VALVE POWER SUPPLY

1.

Turn ignition switch OFF.

2.

Disconnect exhaust valve timing (EVT) control solenoid valve harness connector.

3.

Turn ignition switch ON.

4.

Check the voltage between EVT control solenoid valve harness connector and ground.

Is the inspection result normal?

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

P0078

EX V/T ACT/CIRC-B1
(Exhaust valve control solenoid circuit bank 
1)

An improper voltage is sent to the ECM through exhaust valve timing con-
trol solenoid valve.

Engine operating condition in fail-safe mode

Fail safe mode

Vehicle behavior

Device fix mode

• This mode fixes the IVT control solenoid valve and the EVT control solenoid valve in the refer-

ence position.

• The intake manifold runner control valve motor is turned OFF (intake manifold runner control 

valve opens).

+

Ground

Voltage

EVT control solenoid valve

Connector

Terminal

F41

1

Ground

Battery voltage

P0078 EVT CONTROL SOLENOID VALVE

EC-191

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

CHECK EXHAUST VALVE TIMING CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect IPDM E/R harness connector.

3.

Check the continuity between EVT control solenoid valve harness connector and IPDM E/R harness con-
nector.

4.

Also check harness for short to ground and short to power.

Is the inspection result normal?

YES

>> Perform trouble diagnosis for the power supply circuit.

NO

>> Repair or replace malfunctioning part.

3.

CHECK EVT 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 EVT control solenoid valve 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 or replace malfunctioning part.

4.

CHECK EVT CONTROL SOLENOID VALVE

Refer to 

EC-191, "Component Inspection"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace malfunctioning EVT control solenoid valve. Refer to 

EM-67, "Exploded View"

.

Component Inspection

INFOID:0000000010775121

1.

CHECK EXHAUST VALVE TIMING CONTROL SOLENOID VALVE-1

1.

Turn ignition switch OFF.

2.

Disconnect exhaust valve timing control solenoid valve harness connector.

3.

Check resistance between exhaust valve timing control solenoid valve terminals as per the following.

+

−

Continuity

EVT control solenoid valve

IPDM E/R

Connector

Terminal

Connector

Terminal

F41

1

F72

66

Existed

+

−

Continuity

EVT control solenoid valve

ECM

Connector

Terminal

Connector

Terminal

F41

2

F8

95

Existed

EVT control solenoid valve

Resistance

+

−

Terminal

1

2

6.7 -7.7 

Ω

 [at 20

°

C 

(68

°

F)]

1

Ground

Not exist.

2

EC-192

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

P0078 EVT CONTROL SOLENOID VALVE

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace malfunctioning exhaust valve timing control solenoid valve. Refer to 

EM-67, "Exploded

View"

.

2.

CHECK EXHAUST VALVE TIMING CONTROL SOLENOID VALVE-2

1.

Remove exhaust valve timing control solenoid valve.

2.

Provide battery voltage between exhaust valve timing control
solenoid valve terminals 1 and 2, and then interrupt it. Check
that the plunger moves as shown in the figure.

CAUTION:

Do not apply battery voltage continuously for 5 seconds or
more. Doing so may result in damage to the coil in exhaust
valve timing control solenoid valve.
NOTE:
Always replace O-ring when exhaust valve timing control sole-
noid valve is removed.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace exhaust valve timing control solenoid valve. Refer to 

EM-67, "Exploded View"

.

JMBIA0097ZZ