Infiniti QX56 (JA60). Manual — part 236
KEY SWITCH (BCM INPUT)
DLK-115
< COMPONENT DIAGNOSIS >
[WITH INTELLIGENT KEY SYSTEM]
C
D
E
F
G
H
I
J
L
M
A
B
DLK
N
O
P
KEY SWITCH (BCM INPUT)
Diagnosis Procedure
INFOID:0000000005146991
Regarding Wiring Diagram information, refer to
DLK-178, "Wiring Diagram — INTELLIGENT KEY SYSTEM —
1.
CHECK KEY SWITCH POWER SUPPLY CIRCUIT
1. Remove mechanical key from ignition switch.
2. Disconnect key switch and ignition knob switch connector.
3. Check voltage between key switch and ignition knob switch har-
ness connector M12 terminal 3 and ground.
Is the inspection result normal?
YES
>> GO TO 2
NO
>> Check harness between key switch and ignition knob
switch and fuse.
2.
CHECK KEY SWITCH
Check continuity between key switch and ignition knob switch termi-
nals 3 and 4.
Is the inspection result normal?
YES
>> GO TO 3
NO
>> Replace key cylinder assembly (built-in key switch).
3.
CHECK KEY SWITCH SIGNAL CIRCUIT
1. Disconnect BCM connector.
2. Check continuity between BCM harness connector M18 terminal
37 and key switch and ignition knob switch harness connector
M12 terminal 4.
3. Check continuity between BCM harness connector M18 terminal
37 and ground.
Is the inspection result normal?
YES
>> Key switch (BCM input) circuit is OK.
NO
>> Repair or replace harness between key switch and ignition knob switch and BCM.
3 – Ground
: Battery voltage.
PIIB4254E
Component
Terminals
Condition
Continuity
Ignition
switch
3
4
Insert mechanical key
into ignition switch.
Yes
Remove mechanical key
from ignition switch.
No
PIIA6140E
37 – 4
: Continuity should exist.
37 – Ground
: Continuity should not exist.
PIIB4256E
DLK-116
< COMPONENT DIAGNOSIS >
[WITH INTELLIGENT KEY SYSTEM]
IGNITION KNOB SWITCH
IGNITION KNOB SWITCH
Diagnosis Procedure
INFOID:0000000005146992
Regarding Wiring Diagram information, refer to
DLK-178, "Wiring Diagram — INTELLIGENT KEY SYSTEM —
1.
CHECK IGNITION KNOB SWITCH
With CONSULT-III
Display “PUSH SW” on DATA MONITOR screen, and check if ON/OFF display is linked to ignition switch oper-
ation.
Without CONSULT-III
1. Turn ignition switch OFF.
2. Disconnect Intelligent Key unit connector.
3. Check voltage between Intelligent Key unit harness connector
M70 terminal 27 and ground.
Is the inspection result normal?
YES
>> Ignition knob switch is OK.
NO
>> GO TO 2
2.
CHECK IGNITION KNOB SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect key switch and ignition knob switch connector.
3. Check voltage between key switch and ignition knob switch harness connector M12 terminal 1 and
ground.
Is the inspection result normal?
YES
>> GO TO 3
NO
>> Repair or replace key switch and ignition knob switch
power supply circuit.
3.
CHECK IGNITION KNOB SWITCH OPERATION
Check continuity between key switch and ignition knob switch terminals 1 and 2.
Monitor item
Condition
PUSH SW
Ignition switch is pushed: ON
Ignition switch is released: OFF
Connector
Terminals
Condition
Voltage (V)
(Approx.)
(+)
(–)
M70
27
Ground
Ignition switch is
pushed
Battery voltage
Ignition switch is re-
leased
0
WIIA1175E
1 - Ground
: Battery voltage
PIIB4257E
IGNITION KNOB SWITCH
DLK-117
< COMPONENT DIAGNOSIS >
[WITH INTELLIGENT KEY SYSTEM]
C
D
E
F
G
H
I
J
L
M
A
B
DLK
N
O
P
Is the inspection result normal?
YES
>> GO TO 4
NO
>> Replace key switch and ignition knob switch.
4.
CHECK IGNITION KNOB SWITCH CIRCUIT
1. Check continuity between Intelligent Key unit harness connector (A) M70 terminal 27 and key switch and
ignition knob switch harness connector (B) M12 terminal 2.
2. Check continuity between Intelligent Key unit harness connector
M70 terminal 27 and ground.
Is the inspection result normal?
YES
>> Check the condition of harness and harness connector.
NO
>> Repair or replace harness between Intelligent Key unit
and key switch and ignition knob switch.
Component
Terminals
Condition
Continuity
Ignition
knob switch
1
2
Ignition switch is pushed
Yes
Ignition switch is released
No
PIIA9929E
27 - 2
: Continuity should exist.
27 - Ground
: Continuity should not exist.
WIIA1176E
DLK-118
< COMPONENT DIAGNOSIS >
[WITH INTELLIGENT KEY SYSTEM]
HEADLAMP FUNCTION
HEADLAMP FUNCTION
Diagnosis Procedure
INFOID:0000000005146993
1.
CHECK HEADLAMP OPERATION
Do headlamps operate with headlamp switch?
YES or NO
YES
>> Headlamp circuit is OK.
NO
>> Check headlamp circuit. Refer to
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