Nissan X-Trail 32. Manual - part 975

P025A FUEL PUMP

EC-1029

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

3.

CHECK FUEL PUMP RELAY CIRCUIT-II

1.

Disconnect ECM harness connector.

2.

Disconnect IPDM E/R harness connector.

3.

Check the continuity between ECM harness connector and IPDM E/R 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 or replace error-detected parts.

4.

CHECK 20A FUSE

1.

Disconnect 20A fuse (No. 61) from IPDM E/R.

2.

Check 20A fuse.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace 20A fuse.

ECM

IPDM E/R

Continuity

Connector

Terminal

Connector

Terminal

F117

38

F72

76

Existed

EC-1030

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

P025B FUEL PUMP CONTROL MODULE CONTROL

P025B FUEL PUMP CONTROL MODULE CONTROL

DTC Description

INFOID:0000000010935706

DTC DETECTION LOGIC

POSSIBLE CAUSE

• Harness or connectors (FPCM command circuit is open or shorted.)
• FPCM

FAIL-SAFE

Not applicable

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 1 minute before conducting the next test.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON and wait at least 1 second.

2.

Check DTC.

Is DTC detected?

YES

>> Proceed to 

EC-1030, "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:0000000010935707

1.

CHECK COMMAND VOLTAGE

Check FPCM command voltage as the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 2.

2.

CHECK FUEL PUMP CONTROL MODULE COMMAND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector and FPCM harness connector.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

P025B

FUEL PUMP MODULE CONTROL CIR-
CUIT
(Fuel pump module control circuit range/
performance)
• 1.DEF: OPERATION TEMPERATURE 

TOO HIGH

• CC.0: SHORT CIRCUIT TO EARTH
• CC.1: SHORT-CIRCUIT TO +12V
• CO: OPEN CIRCUIT

• FPCM command circuit is open or shorted.
• ECU temperature is too high.

ECM

Condition

Voltage

Connector

+

–

Terminal

E79

20

8

Ignition switch: OFF 

⇒

 ON (fuel pump activated)

0 – 6.74 V

Ignition switch ON (fuel pump not activated)

0.05 V

P025B FUEL PUMP CONTROL MODULE CONTROL

EC-1031

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

3.

Check the continuity between ECM harness connector and FPCM harness connector.

Is the inspection result normal?

YES

>> Replace FPCM. Refer to 

EC-1231, "Removal and Installation"

.

NO

>> Repair or replace error-detected parts.

+

−

Continuity

ECM

FPCM

Connector

Terminal

Connector

Terminal

E79

20

B133

9

Existed

EC-1032

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

P0335 CKP SENSOR

P0335 CKP SENSOR

DTC Description

INFOID:0000000010935708

DTC DETECTION LOGIC

POSSIBLE CAUSE

• Harness or connectors (The sensor circuit is open or shorted.)
• Crankshaft position sensor
• Signal plate

FAIL-SAFE

• EGR valve is closed position
• Throttle control motor is opened
• Prohibit DPF regeneration
• Prohibit start/stop system
• Torque limitation
• Engine speed limitation
• ESP deactivated

DTC CONFIRMATION PROCEDURE

1.

PERFORM DIAGNOSIS PROCEDURE

NOTE:
DTC P0335 can not duplicate.

>> Proceed to 

EC-1032, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000010935709

1.

CHECK ECM HARNESS CONNECTOR CONNECTIONS

1.

Turn ignition switch OFF.

2.

Check ECM harness connector connection.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace error-detected parts.

2.

CHECK CKP SENSOR HARNESS CONNECTOR CONNECTIONS

Check crankshaft position (CKP) sensor harness connector connection.
Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace error-detected parts.

3.

CHECK CKP SENSOR 

Refer to 

EC-1033, "Component Inspection (Crankshaft Position Sensor)"

.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Replace error-detected parts.

4.

CHECK GEAR TOOTH

Visually check for chipping flywheel gear tooth.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

P0335

ENGINE SPEED SENSOR SIGNAL
(Crankshaft position sensor “A” circuit)
• 1.DEF: NO SIGNAL
• 2.DEF: IMPLAUSIBLE SIGNAL

• Crankshaft position sensor signal is not detected by ECM when engine 

is running.

• Crankshaft position sensor signal is not in the normal pattern when en-

gine is running.