2009 INFINITI QX56 Factory Service Manual

Page 1993 of 4171

INFINITI QX56 2009  Factory Service Manual PARKING LAMP CIRCUITEXL-45
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3. Check continuity between the license plate lamp harness con- nectors and ground.
Does continuity exist?
YES >> In

Page 1994 of 4171

INFINITI QX56 2009  Factory Service Manual EXL-46
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TURN SIGNAL LAMP CIRCUIT
TURN SIGNAL LAMP CIRCUIT
DescriptionINFOID:0000000003776190
The BCM monitors inputs from the combination switch to determine when to activate th

Page 1995 of 4171

INFINITI QX56 2009  Factory Service Manual TURN SIGNAL LAMP CIRCUITEXL-47
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3.CHECK TURN SIGNAL LAMP CIRCUIT FOR OPEN 
1. Turn the ignition switch OFF.
2. Disconnect BCM connector M20.
3.

Page 1996 of 4171

INFINITI QX56 2009  Factory Service Manual EXL-48
< COMPONENT DIAGNOSIS >
TURN SIGNAL LAMP CIRCUIT
1. Check continuity between the front turn/fog lamp harness con-nectors and ground.
2. Check continuity between the rear combination lamp harnne

Page 1997 of 4171

INFINITI QX56 2009  Factory Service Manual OPTICAL SENSOREXL-49
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OPTICAL SENSOR
DescriptionINFOID:0000000003776193
The optical sensor converts the outside brightness (lux) to voltage and

Page 1998 of 4171

INFINITI QX56 2009  Factory Service Manual EXL-50
< COMPONENT DIAGNOSIS >
OPTICAL SENSOR
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 bet

Page 1999 of 4171

INFINITI QX56 2009  Factory Service Manual HEADLAMP AIMING SWITCHEXL-51
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HEADLAMP AIMING SWITCH
DescriptionINFOID:0000000003776196
The manual headlamp aiming system uses a headlamp aiming

Page 2000 of 4171

INFINITI QX56 2009  Factory Service Manual EXL-52
< COMPONENT DIAGNOSIS >
HEADLAMP AIMING SWITCH
NO >> Repair harness or connector. 
Diagnosis Procedure - With Daytime Light SystemINFOID:0000000004221417
1.CHECK HEADLAMP AIMING SWITCH SIGNAL F