NISSAN X-TRAIL 2005 Service Repair Manual

ELECTRICAL LOAD SIGNAL
EC-937
[QR (WITHOUT EURO-OBD)]
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3. CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-I
Without CONSULT-II
1. Turn ignition switch ON.
2. Check voltage between ECM terminal 84 and ground under the
following conditions.
OK or NG
OK >> GO TO 5.
NG >> GO TO 8.
4. CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-II
With CONSULT-II
Check “LOAD SIGNAL” in “DATA MONITOR” mode with CONSULT-
II under the following conditions.
OK or NG
OK >> GO TO 6.
NG >> GO TO 11.
5. CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-II
Without CONSULT-II
Check voltage between ECM terminal 93 and ground under the fol-
lowing conditions.
OK or NG
OK >> GO TO 7.
NG >> GO TO 11.
Condition Voltage
Lighting switch: ON at 2nd position and
placed in LOW positionBATTERY VOLTAGE
Lighting switch: OFF 0V
MBIB0158E
Condition LOAD SIGNAL
Rear window defogger switch: ON ON
Rear window defogger switch: OFF OFF
PBIB0103E
Condition Voltage
Rear window defogger switch: ON BATTERY VOLTAGE
Rear window defogger switch: OFF 0V
PBIB1773E

EC-938
[QR (WITHOUT EURO-OBD)]
ELECTRICAL LOAD SIGNAL

6. CHECK HEATER FAN SIGNAL CIRCUIT OVERALL FUNCTION
With CONSULT-II
Check “HEATER FAN SW” in “DATA MONITOR” mode with CON-
SULT-II under the following conditions.
OK or NG
OK >>INSPECTION END.
NG >> GO TO 14.
7. CHECK HEATER FAN SIGNAL CIRCUIT OVERALL FUNCTION
Without CONSULT-II
Check voltage between ECM terminal 96 and ground under the fol-
lowing conditions.
OK or NG
OK >>INSPECTION END.
NG >> GO TO 14.
8. CHECK HEADLAMP FUNCTION
1. Start engine.
2. Turn the lighting switch ON at 2nd position and placed in LOW position.
3. Check that headlamps are illuminated.
OK or NG
OK >> GO TO 9.
NG >> Refer to LT- 5 , "
HEADLAMP - XENON TYPE -" or LT- 4 1 , "HEADLAMP (WITH DAYTIME) -
XENON TYPE -" .
9. CHECK HEADLAMP INPUT SIGNAL CIRCUIT FOR OPEN OR SHORT
1. Stop engine.
2. Disconnect ECM harness connector.
3. Disconnect daytime light relay LH or HID relay LH.
4. Check harness continuity between ECM terminal 84 and daytime light relay LH terminal 3 or HID relay LH
terminal 3.
Refer to Wiring Diagram.
5. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 16.
NG >> GO TO 10.
Condition LOAD SIGNAL
Heater fan control switch: ON ON
Heater fan control switch: OFF OFF
PBIB1995E
Condition Voltage
Heater fan control switch: ON 0V
Heater fan control switch: OFF BATTERY VOLTAGE
PBIB1219E

ELECTRICAL LOAD SIGNAL
EC-939
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10. DETECT MALFUNCTIONING PART
Check the following.

Harness connectors E106, M14

Harness for open and short between ECM and daytime light relay LH or HID relay LH
>> Repair open circuit or short to ground or short to power in harness or connectors.
11 . CHECK REAR WINDOW DEFOGGER FUNCTION
1. Start engine.
2. Turn ON the rear window defogger switch.
3. Check the rear windshield.
Is the rear windshield heated up?
Ye s o r N o
Ye s > > G O T O 1 2 .
No >> Refer to GW-17, "
REAR WINDOW DEFOGGER" .
12. CHECK REAR WINDOW DEFOGGER INPUT SIGNAL CIRCUIT FOR OPEN OR SHORT
1. Stop engine.
2. Disconnect ECM harness connector.
3. Disconnect rear window defogger relay.
4. Check harness continuity between rear window defogger relay 3 (models without door mirror defogger), 5
(models with door mirror defogger) and ECM terminal 93.
Refer to Wiring Diagram.
5. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 16.
NG >> GO TO 13.
13. DETECT MALFUNCTIONING PART
Check the following.

Harness connectors B1, M17

Harness for open and short between rear window defogger relay and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
14. CHECK HEATER FAN CONTROL FUNCTION
1. Start engine.
2. Turn ON the fan control switch.
3. Check the blower fan motor.
Does the blower fan motor activate?
Ye s o r N o
Ye s > > G O T O 1 5 .
No >> Refer to AT C - 3 4 , "
TROUBLE DIAGNOSIS" or MTC-3, "TROUBLE DIAGNOSIS" . Continuity should exist.

EC-940
[QR (WITHOUT EURO-OBD)]
ELECTRICAL LOAD SIGNAL

15. CHECK HEATER FAN SIGNAL CIRCUIT FOR OPEN OR SHORT
1. Stop engine.
2. Disconnect ECM harness connector.
3. Disconnect A/C AUTO AMP. harness connector.
4. Check harness continuity between A/C AUTO AMP. terminal 19 and ECM terminal 96.
Refer to Wiring Diagram.
5. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 16.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
16. CHECK INTERMITTENT INCIDENT
Perform EC-624, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
RHD MODELS
1. INSPECTION START
Do you have CONSULT-II?
Ye s o r N o
Yes >> GO TO 2.
No >> GO TO 3.
2. CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCITION-I
With CONSULT-II
1. Turn ignition switch ON.
2. Check “LOAD SIGNAL” in “DATA MONITOR” mode with CON-
SULT-II under the following conditions.
OK or NG
OK >> GO TO 4.
NG >> GO TO 8.Continuity should exist.
Condition LOAD SIGNAL
Lighting switch: ON at 2nd position (placed in
LOW position for models with Xenon headlamp)ON
Lighting switch: OFF OFF
PBIB0103E

ELECTRICAL LOAD SIGNAL
EC-941
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3. CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-I
Without CONSULT-II
1. Turn ignition switch ON.
2. Check voltage between ECM terminal 84 and ground under the
following conditions.
OK or NG
OK >> GO TO 5.
NG >> GO TO 8.
4. CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-II
With CONSULT-II
Check “LOAD SIGNAL” in “DATA MONITOR” mode with CONSULT-
II under the following conditions.
OK or NG
OK >> GO TO 6.
NG >> GO TO 13.
5. CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-II
Without CONSULT-II
Check voltage between ECM terminal 93 and ground under the fol-
lowing conditions.
OK or NG
OK >> GO TO 7.
NG >> GO TO 13.
Condition Voltage
Lighting switch: ON at 2nd position (placed in
LOW position for models with Xenon headlamp)BATTERY VOLTAGE
Lighting switch: OFF 0V
MBIB0158E
Condition LOAD SIGNAL
Rear window defogger switch: ON ON
Rear window defogger switch: OFF OFF
PBIB0103E
Condition Voltage
Rear window defogger switch: ON BATTERY VOLTAGE
Rear window defogger switch: OFF 0V
PBIB1773E

EC-942
[QR (WITHOUT EURO-OBD)]
ELECTRICAL LOAD SIGNAL

6. CHECK HEATER FAN SIGNAL CIRCUIT OVERALL FUNCTION
With CONSULT-II
Check “HEATER FAN SW” in “DATA MONITOR” mode with CON-
SULT-II under the following conditions.
OK or NG
OK >>INSPECTION END.
NG >> GO TO 16.
7. CHECK HEATER FAN SIGNAL CIRCUIT OVERALL FUNCTION
Without CONSULT-II
Check voltage between ECM terminal 96 and ground under the fol-
lowing conditions.
OK or NG
OK >>INSPECTION END.
NG >> GO TO 16.
8. CHECK HEADLAMP FUNCTION
1. Start engine.
2. Turn the lighting switch ON at 2nd position (placed in LOW position for models with Xenon headlamp).
3. Check that headlamps are illuminated.
OK or NG
OK (Models without Xenon headlamp)>>GO TO 9.
OK (Models with Xenon headlamp)>>GO TO 11.
NG >> Refer to LT- 5 , "
HEADLAMP - XENON TYPE -" , LT- 2 5 , "HEADLAMP - CONVENTIONAL TYPE -"
, LT- 4 1 , "HEADLAMP (WITH DAYTIME) - XENON TYPE -" or LT- 5 1 , "HEADLAMP (WITH DAY-
TIME) - CONVENTIONAL TYPE -" .
Condition LOAD SIGNAL
Heater fan control switch: ON ON
Heater fan control switch: OFF OFF
PBIB1995E
Condition Voltage
Heater fan control switch: ON 0V
Heater fan control switch: OFF BATTERY VOLTAGE
PBIB1219E

ELECTRICAL LOAD SIGNAL
EC-943
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9. CHECK HEADLAMP INPUT SIGNAL CIRCUIT FOR OPEN OR SHORT
1. Stop engine.
2. Disconnect ECM harness connector.
3. Disconnect lighting switch harness connectors.
4. Check harness continuity between lighting switch terminal 9, 10 and ECM terminal 84 under the following
conditions.
5. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 18.
NG >> GO TO 10.
10. DETECT MALFUNCTIONING PART
Check the following.

Harness connectors E105, M13

Diode E123

Diode E124

Harness for open and short between ECM and combination switch
>> Repair open circuit or short to ground or short to power in harness or connectors.
11 . CHECK HEADLAMP INPUT SIGNAL CIRCUIT FOR OPEN OR SHORT
1. Stop engine.
2. Disconnect ECM harness connector.
3. Disconnect HID relay LH.
4. Check harness continuity between ECM terminal 84 and HID relay LH terminal 3.
Refer to Wiring Diagram.
5. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 18.
NG >> GO TO 12.
Condition Continuity
1 Should exist
2 Should not exist
PBIB1994E

EC-944
[QR (WITHOUT EURO-OBD)]
ELECTRICAL LOAD SIGNAL

12. DETECT MALFUNCTIONING PART
Check the following.

Harness connectors E105, M13

Harness for open and short between ECM and HID relay LH
>> Repair open circuit or short to ground or short to power in harness or connectors.
13. CHECK REAR WINDOW DEFOGGER FUNCTION
1. Start engine.
2. Turn ON the rear window defogger switch.
3. Check the rear windshield.
Is the rear windshield heated up?
Ye s o r N o
Yes >> GO TO 14.
No >> Refer to GW-17, "
REAR WINDOW DEFOGGER" .
14. CHECK REAR WINDOW DEFOGGER INPUT SIGNAL CIRCUIT FOR OPEN OR SHORT
1. Stop engine.
2. Disconnect ECM harness connector.
3. Disconnect rear window defogger relay.
4. Check harness continuity between rear window defogger relay 3 (models without door mirror defogger), 5
(models with door mirror defogger) and ECM terminal 93.
Refer to Wiring Diagram.
5. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 18.
NG >> GO TO 15.
15. DETECT MALFUNCTIONING PART
Check the following.

Harness connectors B1, M17

Harness for open and short between rear window defogger relay and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
16. CHECK HEATER FAN CONTROL FUNCTION
1. Start engine.
2. Turn ON the fan control switch.
3. Check the blower fan motor.
Does the blower fan motor activate?
Ye s o r N o
Yes >> GO TO 17.
No >> Refer to AT C - 3 4 , "
TROUBLE DIAGNOSIS" or MTC-3, "TROUBLE DIAGNOSIS" . Continuity should exist.

ELECTRICAL LOAD SIGNAL
EC-945
[QR (WITHOUT EURO-OBD)]
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17. CHECK HEATER FAN SIGNAL CIRCUIT FOR OPEN OR SHORT
1. Stop engine.
2. Disconnect ECM harness connector.
3. Disconnect A/C AUTO AMP. harness connector.
4. Check harness continuity between A/C AUTO AMP. terminal 19 and ECM terminal 96.
Refer to Wiring Diagram.
5. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 18.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
18. CHECK INTERMITTENT INCIDENT
Perform EC-624, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END Continuity should exist.

EC-946
[QR (WITHOUT EURO-OBD)]
ASCD BRAKE SWITCH

ASCD BRAKE SWITCHPFP:25320
Component DescriptionEBS01FBP
When the brake pedal is depressed, ASCD brake switch is turned
OFF and stop lamp switch is turned ON. ECM detects the state of
the brake pedal by this input of two kinds (ON/OFF signal).
Refer to EC-969, "
AUTOMATIC SPEED CONTROL DEVICE
(ASCD)" for the ASCD function.
CONSULT-II Reference Value in Data Monitor ModeEBS01FBQ
Specification data are reference values.
SEC009D
MONITOR ITEM CONDITION SPECIFICATION
BRAKE SW1
(ASCD brake switch)

Ignition switch: ONClutch pedal (M/T) and brake pedal:
Fully releasedON
Clutch pedal (M/T) and/or brake pedal:
Slightly depressedOFF
BRAKE SW2
(Stop lamp switch)

Ignition switch: ONBrake pedal: Fully released OFF
Brake pedal: Slightly depressed ON