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OPTICAL SENSOREXL-41
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1. Check continuity between BCM harness connector M20 (A) ter- minal 58 and optical sensor harness connector M302 (B) termi-
nal 4.
2. Check continuity between BCM harness connector M20 (A) ter- minal 58 and ground.
Are the continuity test results as specified?
YES >> Replace the optical sensor. Refer to EXL-116, "Removal and Installation".
NO >> Repair harness or connector.
AB
Connector Terminal Connector Terminal Continuity M20 58M302 4Yes
A —Contin u it y
Connector Terminal
M20 58Ground No
ALLIA0407GB
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EXL-42
< COMPONENT DIAGNOSIS >
HEADLAMP AIMING SWITCH
HEADLAMP AIMING SWITCH
DescriptionINFOID:0000000001806205
The manual headlamp aiming system uses a headlamp aiming switch to adjust the axis of the headlamp aim-
ing motor. The headlamp aiming switch has four sett ings, each with a different resistance value. The head-
lamp aiming motor adjusts to the proper axis based off the position of the headlamp aiming switch.
Diagnosis ProcedureINFOID:0000000001806206
1.CHECK HEADLAMP AIMING SWITCH S IGNAL FOR OPEN OR SHORT CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect headlamp aiming switch connector M148, headlamp aiming motor LH connector E11 and headlamp aiming motor RH connector E107.
3. Check continuity between the headlamp aiming switch connector M148 terminal 1 and headlamp aiming
motor LH E11 and RH E107 terminal 7.
4. Check continuity between the headlamp aimi ng switch connector M148 terminal 1 and ground.
Are the continuity test results as specified?
YES >> GO TO 2
NO >> Repair the harness or connector.
2.CHECK HEADLAMP AIMING SWITCH
1. Check continuity between the headlamp aiming switch terminals 1 and 2 in each switch position.
Are the continuity check results as specified?
YES >> GO TO 3
NO >> Replace the headlamp aiming switch.
3.CHECK HEADLAMP AIMING SWITCH GROUND CIRCUIT
1. Turn the ignition switch OFF.
2. Disconnect headlamp aiming switch connector M148.
3. Check continuity between headlamp aiming switch connector M148 terminal 2 and ground.
Is continuity as specified?
YES >> Inspect headlamp aiming motors.
NO >> Repair harness or connector.
Connector TerminalConnector TerminalContinuity
M148 1E11
7Yes
E107
Connector Terminal —Continuity
M148 1Ground No
ComponentTerminalSwitch Position Continuity
Headlamp aiming switch 12 0
604 ohms
1 324 ohms
2 191 ohms
3 130 ohms
Connector Terminal —Continuity
M148 2Ground Yes
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HEADLAMPEXL-43
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HEADLAMP
Wiring Diagram INFOID:0000000001547143
AALWA0085GB
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EXL-44
< COMPONENT DIAGNOSIS >
HEADLAMP
AWLIA0153GB
Revision: March 20102008 QX56
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HEADLAMPEXL-45
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AALIA0182GB
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EXL-46
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HEADLAMP
AALIA0183GB
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DAYTIME LIGHT SYSTEMEXL-47
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DAYTIME LIGHT SYSTEM
Wiring DiagramINFOID:0000000001547144
AWLWA0024GB
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EXL-48
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DAYTIME LIGHT SYSTEM
AWLWA0025GB
Revision: March 20102008 QX56