Infiniti FX35, FX50 (S51). Manual — part 859

P1078, P1084 EVT CONTROL POSITION SENSOR

EC-977

< DTC/CIRCUIT DIAGNOSIS >

[VK50VE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair short to ground or short to power in harness or connectors.

5.

CHECK COMPONENTS

Check the following.
• Crankshaft position sensor (Refer to

EC-876, "Component Inspection"

.)

• Camshaft position sensor (bank 1) (Refer to

EC-881, "Component Inspection"

.)

• Battery current sensor (Refer to

EC-1025, "Component Inspection"

.)

• EVAP control system pressure sensor (Refer to

EC-917, "Component Inspection"

.)

• Manifold absolute pressure sensor (Refer to

EC-785, "Component Inspection"

.)

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace malfunctioning component.

6.

CHECK APP SENSOR

Refer to

EC-1076, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 14.

NO

>> GO TO 7.

7.

REPLACE ACCELERATOR PEDAL ASSEMBLY

1.

Replace accelerator pedal assembly.

2.

Go to

EC-1077, "Special Repair Requirement"

.

>> INSPECTION END

8.

CHECK EVT CONTROL POSITION SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between EVT control position sensor 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 9.

NO

>> Repair open circuit, short to ground or short to power in harness or connectors.

ECM

Sensor

Connector

Terminal

Name

Connector

Terminal

F111

87

Crankshaft position sensor

F2

1

91

Camshaft position sensor (bank 1)

F84

1

EVT control position sensor (bank 1)

F59

1

95

Battery current sensor

E21

1

EVAP control system pressure sensor

B252

3

Manifold absolute pressure sensor

F65

1

M160

99

APP sensor (Wthout ICC)

E112

6

APP sensor (with ICC)

E116

3

DTC

EVT control position sensor

ECM

Continuity

Bank

Connector

Terminal

Connector

Terminal

P1078

1

F59

2

F111

58

Existed

P1084

2

F63

2

EC-978

< DTC/CIRCUIT DIAGNOSIS >

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P1078, P1084 EVT CONTROL POSITION SENSOR

9.

CHECK EVT CONTROL POSITION SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Check the continuity between EVT control position sensor harness connector and ECM harness connec-
tor.

2.

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

Is the inspection result normal?

YES

>> GO TO 10.

NO

>> Repair open circuit, short to ground or short to power in harness or connectors.

10.

CHECK EXHAUST VALVE TIMING CONTROL POSITION SENSOR

Refer to

EC-978, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 11.

NO

>> Replace malfunctioning exhaust valve timing control position sensor.

11.

CHECK CRANKSHAFT POSITION SENSOR

Refer to

EC-876, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 12.

NO

>> Replace crankshaft position sensor.

12.

CHECK CAMSHAFT POSITION SENSOR

Refer to

EC-881, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 13.

NO

>> Replace malfunctioning camshaft position sensor.

13.

CHECK CAMSHAFT (EXH)

Check the following.
• Accumulation of debris to the signal plate of camshaft front end
• Chipping signal plate of camshaft front end
Is the inspection result normal?

YES

>> GO TO 14.

NO

>> Remove debris and clean the signal plate of camshaft

front end or replace camshaft.

14.

CHECK INTERMITTENT INCIDENT

Refer to

GI-36, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000005237452

1.

EXHAUST VALVE TIMING CONTROL POSITION SENSOR-I

1.

Turn ignition switch OFF.

2.

Disconnect exhaust valve timing control position sensor harness connector.

DTC

EVT control position sensor

ECM

Continuity

Bank

Connector

Terminal

Connector

Terminal

P1078

1

F59

3

F111

60

Existed

P1084

2

F63

3

64

JMBIA1571ZZ

P1078, P1084 EVT CONTROL POSITION SENSOR

EC-979

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3.

Loosen the fixing bolt of the sensor.

4.

Remove the sensor.

5.

Visually check the sensor for chipping.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace malfunctioning exhaust valve timing control

position sensor.

2.

EXHAUST VALVE TIMING CONTROL POSITION SENSOR-II

Check resistance exhaust valve timing control position sensor terminals as shown below.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace malfunctioning exhaust valve timing control position sensor.

JMBIA0065ZZ

Terminals

Resistance

1 (+) - 2 (-)

Except 0 or

∞

Ω

[at 25

°

C (77

°

F)]

1 (+) - 3 (-)

2 (+) - 3 (-)

EC-980

< DTC/CIRCUIT DIAGNOSIS >

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P1087, P1088 VVEL SYSTEM

P1087, P1088 VVEL SYSTEM

DTC Logic

INFOID:0000000005237453

DTC DETECTION LOGIC

NOTE:
If DTC P1087 or P1088 is displayed with DTC P1090 or P1093.
Perform the trouble diagnosis for DTC P1090 or P1093. Refer to

EC-985, "DTC Logic"

.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P1087

VVEL small event angle malfunction
(bank 1)

The event angle of VVEL control
shaft is always small.

• Harness or connectors

(VVEL actuator motor circuit is
open or shorted.)

• VVEL actuator motor
• VVEL actuator sub assembly
• VVEL ladder assembly
• VVEL control module

P1088

VVEL small event angle malfunction
(bank 2)