Infiniti QX4 (R50). Manual — part 361
Trouble Diagnoses
NBEL0110
SYMPTOM CHART
NBEL0110S01
REFERENCE PAGE (EL-
)
SYMPTOM
MAIN
POWER
SUPPL
Y
AND
GROUND
CIRCUIT
CHECK
DOOR
SWITCH
CHECK
KEY
SWITCH
(INSER
T)
CHECK
DOOR
LOCK/UNLOCK
SWITCH
CHECK
FRONT
DOOR
KEY
CYLINDER
SWITCH
CHECK
BACK
DOOR
KEY
CYLINDER
SWITCH
CHECK
DOOR
LOCK
ACTUA
T
O
R
CHECK
Key reminder door system does not operate
properly.
X
X
X
X
Specific door lock actuator does not operate.
X
X
Power door lock does not operate with door
lock and unlock switch (LH and RH) on door
trim.
X
X
Power door lock does not operate with front
door key cylinder operation.
X
X
Power door lock does not operate with back
door key cylinder operation.
X
X
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
POWER DOOR LOCK
Trouble Diagnoses
EL-261
SEL304X
MAIN POWER SUPPLY AND GROUND CIRCUIT CHECK
=NBEL0110S02
Main Power Supply Circuit Check
NBEL0110S0201
Terminal
Ignition switch
(+)
(−)
OFF
ACC
ON
10
Ground
Battery
voltage
Battery
voltage
Battery
voltage
11
SEL013W
Ground Circuit Check
NBEL0110S0202
Terminals
Continuity
16 - Ground
Yes
POWER DOOR LOCK
Trouble Diagnoses (Cont’d)
EL-262
DOOR SWITCH CHECK
=NBEL0110S05
1
CHECK DOOR SWITCH INPUT SIGNAL
Check voltage between smart entrance control unit terminals 28, 29 or 40 and ground.
SEL305X
Refer to wiring diagram in EL-256.
OK or NG
OK
©
Door switch is OK.
NG
©
GO TO 2.
2
CHECK DOOR SWITCH
1. Disconnect door switch connector.
2. Check continuity between door switch terminals.
SEL306X
OK or NG
OK
©
Check the following.
I
Door switch ground circuit (Front LH, back door) or door switch ground condition
I
Harness for open or short between smart entrance control unit and door switch
NG
©
Replace door switch.
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
POWER DOOR LOCK
Trouble Diagnoses (Cont’d)
EL-263
KEY SWITCH (INSERT) CHECK
=NBEL0110S06
1
CHECK KEY SWITCH INPUT SIGNAL
Check voltage between smart entrance control unit terminal 32 and ground.
SEL307X
Refer to wiring diagram in EL-257.
OK or NG
OK
©
Key switch is OK.
NG
©
GO TO 2.
2
CHECK KEY SWITCH (INSERT)
Check continuity between terminals 1 and 2.
SEL308X
OK or NG
OK
©
Check the following.
I
7.5A fuse [No. 24, located in fuse block (J/B)]
I
Harness for open or short between key switch and fuse
I
Harness for open or short between smart entrance control unit and key switch
NG
©
Replace key switch.
POWER DOOR LOCK
Trouble Diagnoses (Cont’d)
EL-264
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