2009 INFINITI QX56 Factory Service Manual

Page 1713 of 4171

INFINITI QX56 2009  Factory Service Manual 
EC-386
< COMPONENT DIAGNOSIS >[VK56DE]
ASCD BRAKE SWITCH
10.CHECK STOP LAMP SWITCH
Refer to  EC-386, "Component Inspection"
.
OK or NG
OK >> GO TO 11.
NG >> Replace stop lamp switch.
11 .CHECK INTERM

Page 1714 of 4171

INFINITI QX56 2009  Factory Service Manual 
ASCD INDICATOREC-387
< COMPONENT DIAGNOSIS > [VK56DE]
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ASCD INDICATOR
Component DescriptionINFOID:0000000003771706
ASCD indicator lamp illuminates to indicate ASCD oper

Page 1715 of 4171

INFINITI QX56 2009  Factory Service Manual 
EC-388
< COMPONENT DIAGNOSIS >[VK56DE]
COOLING FAN
COOLING FAN
Diagnosis ProcedureINFOID:0000000003771708
1.CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R harness conn

Page 1716 of 4171

INFINITI QX56 2009  Factory Service Manual 
COOLING FANEC-389
< COMPONENT DIAGNOSIS > [VK56DE]
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2. Supply cooling fan motor terminals with battery voltage and
check operation.
Cooling fan motor should operate.
If

Page 1717 of 4171

INFINITI QX56 2009  Factory Service Manual 
EC-390
< COMPONENT DIAGNOSIS >[VK56DE]
ELECTRICAL LOAD SIGNAL
ELECTRICAL LOAD SIGNAL
DescriptionINFOID:0000000003771710
The electrical load signal (Headlamp switch signal, r
ear window defogger switc

Page 1718 of 4171

INFINITI QX56 2009  Factory Service Manual 
ELECTRICAL LOAD SIGNALEC-391
< COMPONENT DIAGNOSIS > [VK56DE]
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>>
INSPECTION END
Revision: December 20092009 QX56

Page 1719 of 4171

INFINITI QX56 2009  Factory Service Manual 
EC-392
< COMPONENT DIAGNOSIS >[VK56DE]
FUEL INJECTOR
FUEL INJECTOR
Component DescriptionINFOID:0000000003771712
The fuel injector is a small, precise solenoid valve. When the ECM
supplies a ground to

Page 1720 of 4171

INFINITI QX56 2009  Factory Service Manual 
FUEL INJECTOREC-393
< COMPONENT DIAGNOSIS > [VK56DE]
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2. Disconnect fuel injector harness connector.
3. Turn ignition switch ON.
4. Check voltage between fuel injector