2009 INFINITI QX56 light

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Page 1711 of 4171

INFINITI QX56 2009  Factory Service Manual 
EC-384
< COMPONENT DIAGNOSIS >[VK56DE]
ASCD BRAKE SWITCH
OK or NG
OK >>
INSPECTION END
NG >> GO TO 7.
3.CHECK ASCD BRAKE SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ASCD br

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 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 1726 of 4171

INFINITI QX56 2009  Factory Service Manual 
ICC BRAKE SWITCHEC-399
< COMPONENT DIAGNOSIS > [VK56DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
ICC BRAKE SWITCH
Component DescriptionINFOID:0000000003771718
When depress on the brake pedal, ICC brake switch

Page 1727 of 4171

INFINITI QX56 2009  Factory Service Manual 
EC-400
< COMPONENT DIAGNOSIS >[VK56DE]
ICC BRAKE SWITCH
Check voltage between ECM terminal 101 and ground under the fol-
lowing conditions.
OK or NG
OK >>
INSPECTION END
NG >> GO TO 10.
3.CHECK DTC W

Page 1730 of 4171

INFINITI QX56 2009  Factory Service Manual 
ICC BRAKE SWITCHEC-403
< COMPONENT DIAGNOSIS > [VK56DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
3. Check continuity between ICC brake switch terminals 1 and 2
under the following conditions.
If NG, adjust IC

Page 1746 of 4171

INFINITI QX56 2009  Factory Service Manual 
ECM
EC-419
< ECU DIAGNOSIS > [VK56DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
ECU DIAGNOSIS
ECM
CONSULT-lll Reference Valu
e in Data Monitor ModeINFOID:0000000003771731
Remarks:
�z Specification data are ref

Page 1747 of 4171

INFINITI QX56 2009  Factory Service Manual 
EC-420
< ECU DIAGNOSIS >[VK56DE]
ECM
LOAD SIGNAL  Ignition switch: ONRear window defogger switch is ON 
and/or lighting switch is in 2nd.
ON
Rear window defogger switch is OFF 
and lighting switch i