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ELECTRICAL LOAD SIGNAL
EC-639
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Wiring DiagramEBS00BAA
TBWA0094E
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EC-640
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ELECTRICAL LOAD SIGNAL
TBWA0095E
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![NISSAN X-TRAIL 2003 Electronic Repair Manual ELECTRICAL LOAD SIGNAL
EC-641
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Diagnostic ProcedureEBS00BAB
1.INSPECTION START
Do you have CONSULT-II?
Ye s o r N o
Yes >>GOTO2.
No >> GO TO 5.
2.CHECK NISSAN X-TRAIL 2003 Electronic Repair Manual ELECTRICAL LOAD SIGNAL
EC-641
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Diagnostic ProcedureEBS00BAB
1.INSPECTION START
Do you have CONSULT-II?
Ye s o r N o
Yes >>GOTO2.
No >> GO TO 5.
2.CHECK](/manual-img/5/57402/w960_57402-1754.png)
ELECTRICAL LOAD SIGNAL
EC-641
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Diagnostic ProcedureEBS00BAB
1.INSPECTION START
Do you have CONSULT-II?
Ye s o r N o
Yes >>GOTO2.
No >> GO TO 5.
2.CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-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 3.
NG >> GO TO 8.
3.CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-II
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 12.
4.CHECK HEATER FAN SIGNAL CIRCUIT OVERALL FUNCTION
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 >>INSPECTION END
NG >> GO TO 16.
Condition LOAD SIGNAL
Rear window defogger switch "ON" ON
Rear window defogger switch "OFF" OFF
PBIB0103E
Condition LOAD SIGNAL
Lighting switch "ON" at 2nd position ON
Lighting switch "OFF" OFF
PBIB0103E
Condition LOAD SIGNAL
Heater fan control switch "ON" ON
Heater fan control switch "OFF" OFF
PBIB0103E
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![NISSAN X-TRAIL 2003 Electronic Repair Manual EC-642
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ELECTRICAL LOAD SIGNAL
5.CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-I
Without CONSULT-II
1. Turn ignition switch “ON”.
2. Check voltage between ECM terminal 52 and g NISSAN X-TRAIL 2003 Electronic Repair Manual EC-642
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ELECTRICAL LOAD SIGNAL
5.CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-I
Without CONSULT-II
1. Turn ignition switch “ON”.
2. Check voltage between ECM terminal 52 and g](/manual-img/5/57402/w960_57402-1755.png)
EC-642
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ELECTRICAL LOAD SIGNAL
5.CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-I
Without CONSULT-II
1. Turn ignition switch “ON”.
2. Check voltage between ECM terminal 52 and ground under the
following conditions.
OK or NG
OK >> GO TO 6.
NG >> GO TO 8.
6.CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-II
Without CONSULT-II
1. Turn ignition switch “ON”.
2. Check voltage between ECM terminal 53 and ground under the
following conditions.
OK or NG
OK >> GO TO 7.
NG >> GO TO 12.
7.CHECK HEATER FAN CONTROL CIRCUIT OVERALL FUNCTION
Without CONSULT-II
1. Turn ignition switch “ON”.
2. Check voltage between ECM terminal 55 and ground under the
following conditions.
OK or NG
OK >>INSPECTION END
NG >> GO TO 16.
8.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 >>GOTO9.
No >> Refer toGW-9, "
REAR WINDOW DEFOGGER".
Condition Voltage
Rear window defogger switch "ON" BATTERY VOLTAGE
Rear window defogger switch "OFF" 0V
PBIB0660E
Condition Voltage
Lighting switch "ON" at 2nd position BATTERY VOLTAGE
Lighting switch "OFF" 0V
PBIB0070E
Condition Voltage
Heater fan control switch "ON" 0V
heater fan control switch "OFF" Approximately 5V
PBIB0661E
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![NISSAN X-TRAIL 2003 Electronic Repair Manual ELECTRICAL LOAD SIGNAL
EC-643
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9.CHECK REAR WINDOW DEFOGGER INPUT SIGNAL CIRCUIT FOR OPEN OR SHORT
1. Stop engine.
2. Disconnect ECM harness connector. NISSAN X-TRAIL 2003 Electronic Repair Manual ELECTRICAL LOAD SIGNAL
EC-643
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9.CHECK REAR WINDOW DEFOGGER INPUT SIGNAL CIRCUIT FOR OPEN OR SHORT
1. Stop engine.
2. Disconnect ECM harness connector.](/manual-img/5/57402/w960_57402-1756.png)
ELECTRICAL LOAD SIGNAL
EC-643
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9.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 ECM terminal 52 and harness connector M17 terminal 1 (RHD mod-
els), 5 (LHD models).
5. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 11.
NG >> GO TO 10.
10.DETECT MALFUNCTIONING PART
Check the following.
lHarness connectors M62, F42
lHarness for open and short between ECM and harness connector M17
>> Repair open circuit or short to ground or short to power in harness or connectors.
11 .CHECK INTERMITTENT INCIDENT
PerformEC-453, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT".
>>INSPECTION END
12.CHECK HEADLAMP FUNCTION
1. Start engine.
2. Turn the lighting switch “ON” at 2nd position.
3. Check that headlamps are illuminated.
OK or NG
OK >> GO TO 13.
NG >> Refer toLT- 4 , "
HEADLAMP"orLT- 9 , "HEADLAMP - DAYTIME LIGHT SYSTEM -". Continuity should exist.
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![NISSAN X-TRAIL 2003 Electronic Repair Manual EC-644
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ELECTRICAL LOAD SIGNAL
13.CHECK HEADLAMP INPUT SIGNAL CIRCUIT FOR OPEN OR SHORT
1. Stop engine.
2. Disconnect ECM harness connector.
3. Disconnect lighting switch harnes NISSAN X-TRAIL 2003 Electronic Repair Manual EC-644
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ELECTRICAL LOAD SIGNAL
13.CHECK HEADLAMP INPUT SIGNAL CIRCUIT FOR OPEN OR SHORT
1. Stop engine.
2. Disconnect ECM harness connector.
3. Disconnect lighting switch harnes](/manual-img/5/57402/w960_57402-1757.png)
EC-644
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ELECTRICAL LOAD SIGNAL
13.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 ECM terminal 53 and lighting switch terminal 9, 10 under the following
conditions.
5. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 15.
NG >> GO TO 14.
14.DETECT MALFUNCTIONING PART
Check the following.
lHarness connectors E60, F36
lDiode E123, E124
lHarness for open and short between ECM and lighting switch
>> Repair open circuit or short to ground or short to power in harness or connectors.
15.CHECK INTERMITTENT INCIDENT
PerformEC-453, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT".
>>INSPECTION END
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 >>GOTO17.
No >> Refer toAT C - 3 0 , "
TROUBLE DIAGNOSIS".
Condition Continuity
1 Should exist
2 Should not exist
PBIB0662E
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ELECTRICAL LOAD SIGNAL
EC-645
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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 ECM terminal 55 and A/C AUTO AMP. terminal 19.
Refer to Wiring Diagram.
5. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 19.
NG >> GO TO 18.
18.DETECT MALFUNCTIONING PART
Check the following.
lHarness connectors M62, F42
lHarness for open and short between ECM and A/C AUTO AMP.
>> Repair open circuit or short to ground or short to power in harness or connectors.
19.CHECK INTERMITTENT INCIDENT
PerformEC-453, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT".
>>INSPECTION END Continuity should exist.
Page 1760 of 3066
EC-646
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DATA LINK CONNECTOR
DATA LINK CONNECTOR
PFP:24814
Wiring DiagramEBS00BAC
TBWA0097E