Nissan X-Trail 32. Instruction — part 912
ELECTRICAL LOAD SIGNAL
EC-777
< DTC/CIRCUIT DIAGNOSIS >
[QR25DE]
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ELECTRICAL LOAD SIGNAL
Description
INFOID:0000000010986484
The electrical load signal (Headlamp switch signal, rear window defogger switch signal, etc.) is transferred via
the CAN communication.
Component Function Check
INFOID:0000000010986485
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
.
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
.
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
.
Diagnosis Procedure
INFOID:0000000010986486
1.
INSPECTION START
Confirm the malfunctioning circuit (rear window defogger, headlamp or heater fan). Refer to
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
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 >
[QR25DE]
ELECTRICAL LOAD SIGNAL
>> INSPECTION END
3.
CHECK HEADLAMP SYSTEM
Check headlamp system. Refer to
(with halogen headlamp) or
(with LED headlamp).
>> INSPECTION END
4.
CHECK HEATER FAN CONTROL SYSTEM
Check heater fan control system. Refer to
(with automatic air conditioner) or
(with instruction air conditioner).
>> INSPECTION END
FUEL INJECTOR
EC-779
< DTC/CIRCUIT DIAGNOSIS >
[QR25DE]
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FUEL INJECTOR
Component Function Check
INFOID:0000000010986487
1.
INSPECTION START
Turn ignition switch to START.
Are any cylinders ignited?
YES
>> GO TO 2.
NO
>> Proceed to
.
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
.
Diagnosis Procedure
INFOID:0000000010986488
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 >
[QR25DE]
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"
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
INFOID:0000000010986489
1.
CHECK FUEL INJECTOR
1.
Turn ignition switch OFF.
2.
Disconnect fuel injector harness connector.
+
-
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
9
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