Nissan X-Trail 32. Manual - part 912

ELECTRICAL LOAD SIGNAL

EC-777

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ELECTRICAL LOAD SIGNAL

Description

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The electrical load signal (Headlamp switch signal, rear window defogger switch signal, etc.) is transferred via
the CAN communication.

Component Function Check

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1.

CHECK REAR WINDOW DEFOGGER SWITCH FUNCTION

1.

Turn ignition switch ON.

2.

Connect CONSULT and select “DATA MONITOR” mode.

3.

Select “LOAD SIGNAL” and check indication under the following conditions.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Proceed to 

EC-777, "Diagnosis Procedure"

.

2.

CHECK LIGHTING SWITCH FUNCTION

Check “LOAD SIGNAL” indication under the following conditions.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Proceed to 

EC-777, "Diagnosis Procedure"

.

3.

CHECK HEATER FAN CONTROL SWITCH FUNCTION

Select “HEATER FAN SW” and check indication under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Proceed to 

EC-777, "Diagnosis Procedure"

.

Diagnosis Procedure

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1.

INSPECTION START

Confirm the malfunctioning circuit (rear window defogger, headlamp or heater fan). Refer to 

EC-777, "Compo-

nent Function Check"

.

Which circuit is related to the incident?

Rear window defogger>>GO TO 2.
Headlamp>>GO TO 3.
Heater fan>>GO TO 4.

2.

CHECK REAR WINDOW DEFOGGER SYSTEM

Check rear window defogger system. Refer to 

DEF-25, "Work Flow"

.

Monitor item

Condition

Indication

LOAD SIGNAL

Rear window defogger switch

ON

ON

OFF

OFF

Monitor item

Condition

Indication

LOAD SIGNAL

Lighting switch

ON at 2nd position

ON

OFF

OFF

Monitor item

Condition

Indication

HEATER FAN SW

Heater fan control switch

ON

ON

OFF

OFF

EC-778

< DTC/CIRCUIT DIAGNOSIS >

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ELECTRICAL LOAD SIGNAL

>> INSPECTION END

3.

CHECK HEADLAMP SYSTEM

Check headlamp system. Refer to 

EXL-297, "Work Flow"

 (with halogen headlamp) or 

EXL-95, "Work Flow"

(with LED headlamp).

>> INSPECTION END

4.

CHECK HEATER FAN CONTROL SYSTEM

Check heater fan control system. Refer to 

HAC-69, "Work Flow"

 (with automatic air conditioner) or 

HAC-183,

"Work Flow"

 (with manual air conditioner).

>> INSPECTION END

FUEL INJECTOR

EC-779

< DTC/CIRCUIT DIAGNOSIS >

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FUEL INJECTOR

Component Function Check

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1.

INSPECTION START

Turn ignition switch to START.
Are any cylinders ignited?

YES

>> GO TO 2.

NO

>> Proceed to 

EC-779, "Diagnosis Procedure"

.

2.

CHECK FUEL INJECTOR FUNCTION

With CONSULT

1.

Start engine.

2.

Perform “POWER BALANCE” in “ACTIVE TEST” mode with CONSULT.

3.

Check that each circuit produces a momentary engine speed drop.

Without CONSULT

1.

Start engine.

2.

Listen to each fuel injector operating sound.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Proceed to 

EC-779, "Diagnosis Procedure"

.

Diagnosis Procedure

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1.

CHECK FUEL INJECTOR POWER SUPPLY

1.

Turn ignition switch OFF.

2.

Disconnect fuel injector harness connector.

3.

Turn ignition switch ON.

4.

Check the voltage between fuel injector harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

CHECK FUEL INJECTOR POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect IPDM E/R harness connector.

3.

Check the continuity between fuel injector harness connector and IPDM E/R harness connector.

Clicking sound should be heard.

PBIB3332E

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Voltage

Fuel injector

Cylinder

Connector

Terminal

1

F37

1

Ground

Battery voltage

2

F38

1

3

F39

1

4

F40

1

EC-780

< DTC/CIRCUIT DIAGNOSIS >

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FUEL INJECTOR

Is the inspection result normal?

YES

>> Perform the trouble diagnosis for power supply circuit.

NO

>> Repair or replace error-detected parts.

3.

CHECK FUEL INJECTOR OUTPUT SIGNAL CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between fuel injector harness connector and ECM harness connector.

4.

Also check harness for short to ground and to power.

Is the inspection result normal?

YES

>> GO TO 4.

NO

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

4.

CHECK FUEL INJECTOR

Check fuel injector. Refer to 

EC-780, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace malfunctioning fuel injector. Refer to 

EM-184, "Removal and Installation"

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5.

CHECK INTERMITTENT INCIDENT

Check intermittent incident. Refer to 

GI-44, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace IPDM E/R. Refer to 

PCS-60, "Removal and Installation"

.

NO

>> Repair or replace error-detected parts.

Component Inspection

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1.

CHECK FUEL INJECTOR

1.

Turn ignition switch OFF.

2.

Disconnect fuel injector harness connector.

+

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Continuity

Fuel injector

IPDM E/R

Cylinder

Connector

Terminal

Connector

Terminal

1

F37

1

E11

21

Existed

2

F38

3

F39

4

F40

1

F37

E72

66

2

F38

3

F39

4

F40

+

-

Continuity

Fuel injector

ECM

Cylinder

Connector

Terminal

Connector

Terminal

1

F37

2

F85

13

Existed

2

F38

2

14

3

F39

2

10

4

F40

2

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