Nissan Qashqai J11. Manual - part 299

 

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Nissan Qashqai J11. Manual - part 299

 

 

P0078 EVT CONTROL SOLENOID VALVE

ECM-173

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

C

D

E

F

G

H

I

J

K

L

M

A

ECM

N

P

O

P0078 EVT CONTROL SOLENOID VALVE

DTC Description

INFOID:0000000010702900

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 

ECM-173, "Diagnosis Procedure"

.

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-41, "Intermittent Incident"

.

NO-2

>> Confirmation after repair: INSPECTION END

Diagnosis Procedure

INFOID:0000000010702901

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

F78

1

Ground

Battery voltage

ECM-174

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

P0078 EVT CONTROL SOLENOID VALVE

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 

ECM-174, "Component Inspection"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace malfunctioning EVT control solenoid valve. Refer to 

EM-183, "Exploded View"

.

Component Inspection

INFOID:0000000010702902

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

F78

1

F90

96

Existed

+

−

Continuity

EVT control solenoid valve

ECM

Connector

Terminal

Connector

Terminal

F78

2

F16

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

P0078 EVT CONTROL SOLENOID VALVE

ECM-175

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

C

D

E

F

G

H

I

J

K

L

M

A

ECM

N

P

O

Is the inspection result normal?

YES

>> GO TO 2.

NO

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

EM-183, "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-183, "Exploded View"

.

JMBIA0097ZZ

ECM-176

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

P0087, P0088, P0090 FRP CONTROL SYSTEM

P0087, P0088, P0090 FRP CONTROL SYSTEM

DTC Description

INFOID:0000000010702903

DTC DETECTION LOGIC

NOTE:
DTC P0087, P0088 or P0090 may be displayed when running out of gas.

POSSIBLE CAUSE

• Harness or connectors
- The high pressure fuel pump circuit is open or shorted.
- The low pressure fuel pump circuit is open or shorted.
• High pressure fuel pump
• High pressure fuel pump system
• Low  pressure fuel pump
• Low  pressure fuel pump system
• Fuel pressure regulator
• Fuel rail pressure sensor
• Incorrect hose connection
• Out of gas

FAIL-SAFE

DTC CONFIRMATION PROCEDURE

1.

CHECK DTC PRIORITY

If DTC P0087, P0088 or P0090 is displayed with DTC P1197, first perform the trouble diagnosis for DTC
P1197.

Is applicable DTC detected?

YES

>> Perform diagnosis of applicable. Refer to 

ECM-317, "DTC Description"

.

NO

>> GO TO 2.

2.

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 11 V or more at idle.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

P0087

LOW FUEL PRES

The following condition continues for 5 seconds or more after engine start.
• Target fuel pressure

−

 Actual fuel pressure > 2.7 MPa

P0088

HIGH FUEL PRES

The following condition continues for 5 seconds or more after engine start.
• Actual fuel pressure 

−

 Target fuel pressure > 2.7 MPa

P0090

FUEL PRESSURE CONTROL FUNCTION

The following condition continues for 5 seconds or more after engine start.
• Fuel rail pressure remains at 1.1 MPa or less. 
• Fuel rail pressure remains at 18.5 MPa or more.

Engine operating condition in fail-safe mode

Fail safe mode

Vehicle behavior

Traveling con-
trol mode

Accelerator an-
gle variation 
control

ECM controls the accelerator pedal depression speed to make it slower than actual speed. This 
causes a drop in accelerating performance and encourages the driver to repair malfunction.
NOTE:
ECM does not control the accelerator pedal releasing speed.

Combustion 
control mode

Stratified charge 
combustion 
control at start-
ing

No stratified charge combustion at starting (cold start).

 

 

 

 

 

 

 

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