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ELECTRICAL LOAD SIGNAL
EC-855
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TBWA0638E
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![NISSAN X-TRAIL 2003 Service Repair Manual EC-856
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ELECTRICAL LOAD SIGNAL
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuri NISSAN X-TRAIL 2003 Service Repair Manual EC-856
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ELECTRICAL LOAD SIGNAL
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuri](/manual-img/5/57404/w960_57404-1233.png)
EC-856
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ELECTRICAL LOAD SIGNAL
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
Diagnostic ProcedureEBS01151
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.
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.
TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
93 BRElectrical load signal
(Rear window defogger
signal)[Ignition switch: ON]
Rear window defogger switch: ONBATTERY VOLTAGE
(11 - 14V)
[Ignition switch: ON]
Rear window defogger switch: OFFApproximately 0V
Condition LOAD SIGNAL
Lighting switch ON at 2nd position ON
Lighting switch OFF OFF
PBIB0103E
Condition Voltage
Lighting switch ON at 2nd position BATTERY VOLTAGE
Lighting switch OFF 0V
MBIB0158E
Page 1235 of 4179
![NISSAN X-TRAIL 2003 Service Repair Manual ELECTRICAL LOAD SIGNAL
EC-857
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4. CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-II
With CONSULT-II
Check “LOAD SIGNAL” in “DATA MONITOR” mode w NISSAN X-TRAIL 2003 Service Repair Manual ELECTRICAL LOAD SIGNAL
EC-857
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4. CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-II
With CONSULT-II
Check “LOAD SIGNAL” in “DATA MONITOR” mode w](/manual-img/5/57404/w960_57404-1234.png)
ELECTRICAL LOAD SIGNAL
EC-857
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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.
6. CHECK HEATER FAN SIGNAL CIRCUIT OVERALL FUNCTION
With CONSULT-II
Check “LOAD SIGNAL” in “DATA MONITOR” mode with CONSULT-
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.
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
Condition HEATER FAN SW
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 Approximately 5V
PBIB1219E
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![NISSAN X-TRAIL 2003 Service Repair Manual EC-858
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ELECTRICAL LOAD SIGNAL
8. 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 NISSAN X-TRAIL 2003 Service Repair Manual EC-858
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ELECTRICAL LOAD SIGNAL
8. 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](/manual-img/5/57404/w960_57404-1235.png)
EC-858
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ELECTRICAL LOAD SIGNAL
8. 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 9.
NG >> Refer to LT- 4 , "
HEADLAMP" or LT- 2 0 , "HEADLAMP - DAYTIME LIGHT SYSTEM -" .
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 16.
NG >> GO TO 10.
10. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors E106, M14 (LHD models)
Harness connectors E105, M13 (RHD models)
Diode E123
Diode E124
Harness for open and short between lighting switch and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
Condition Continuity
1 Should exist
2 Should not exist
PBIB1994E
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![NISSAN X-TRAIL 2003 Service Repair Manual ELECTRICAL LOAD SIGNAL
EC-859
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11 . CHECK REAR WINDOW DEFOGGER FUNCTION
1. Start engine.
2. Turn ON the rear window defogger switch.
3. Check the re NISSAN X-TRAIL 2003 Service Repair Manual ELECTRICAL LOAD SIGNAL
EC-859
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11 . CHECK REAR WINDOW DEFOGGER FUNCTION
1. Start engine.
2. Turn ON the rear window defogger switch.
3. Check the re](/manual-img/5/57404/w960_57404-1236.png)
ELECTRICAL LOAD SIGNAL
EC-859
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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 (without door mirror defogger), 5 (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" .
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.Continuity should exist.
Continuity should exist.
Page 1238 of 4179
EC-860
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ELECTRICAL LOAD SIGNAL
16. CHECK INTERMITTENT INCIDENT
Perform EC-570, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Page 1239 of 4179
MI & DATA LINK CONNECTORS
EC-861
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MI & DATA LINK CONNECTORSPFP:24814
Wiring DiagramEBS01152
LHD MODELS
TBWA0639E
Page 1240 of 4179
EC-862
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MI & DATA LINK CONNECTORS
TBWA0640E