Infiniti G20 (P11). Manual — part 351
![](/vehicles/zatt/wheiso/zix/xcabejongboa.png)
Trouble Diagnoses
NCEL0110
SYMPTOM CHART
NCEL0110S01
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
FRONT
DOOR
UNLOCK
SENSOR
CHECK
DOOR
LOCK
ACTUA
T
O
R
CHECK
Key reminder door system does not operate
properly.
X
X
X
X
X
Specific door lock actuator does not operate.
X
Power door lock does not operate with door
lock and unlock switch on power window main
switch.
X
X
Power door lock does not operate with front
door key cylinder operation.
X
X
Power door lock does not operate with front
door lock knob switch.
X
X
SEL872V
MAIN POWER SUPPLY AND GROUND CIRCUIT CHECK
NCEL0110S02
Main Power Supply Circuit Check
NCEL0110S0201
Terminal
Ignition switch
(+)
(−)
OFF
ACC
ON
11
Ground
Battery
voltage
Battery
voltage
Battery
voltage
GI
MA
EM
LC
EC
FE
CL
MT
AT
AX
SU
BR
ST
RS
BT
HA
SC
IDX
POWER DOOR LOCK
Trouble Diagnoses
EL-181
![](/vehicles/zatt/wheiso/zix/hyo.png)
SEL881V
Ground Circuit Check
NCEL0110S0202
Terminals
Continuity
16 - Ground
Yes
DOOR SWITCH CHECK
NCEL0110S05
1
CHECK DOOR SWITCHES INPUT SIGNAL
Check voltage between control unit terminals 29 or 40 and ground.
SEL186X
Refer to wiring diagram in EL-178.
OK or NG
OK
©
Door switch is OK.
NG
©
GO TO 2.
2
CHECK DOOR SWITCHES
Check continuity between door switch terminals.
SEL187X
OK or NG
OK
©
Check the following.
I
Door switch ground circuit
I
Harness for open or short between control unit and door switch
NG
©
Replace door switch.
POWER DOOR LOCK
Trouble Diagnoses (Cont’d)
EL-182
![](/vehicles/zatt/wheiso/zix/hent.png)
KEY SWITCH (INSERT) CHECK
=NCEL0110S06
1
CHECK KEY SWITCH INPUT SIGNAL
Check voltage between control unit terminal 32 and ground.
SEL873V
Refer to wiring diagram in EL-178.
Voltage [V]:
Condition of key switch: Key is inserted.
Approx. 12
Condition of key switch: Key is withdrawn.
0
OK or NG
OK
©
Key switch is OK.
NG
©
GO TO 2.
2
CHECK KEY SWITCH (INSERT)
Check continuity between terminals 1 and 2.
SEL784V
Continuity:
Condition of key switch: Key is inserted.
Yes
Condition of key switch: Key is removed.
No
OK or NG
OK
©
Check the following.
I
10A 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 control unit and key switch
NG
©
Replace key switch.
GI
MA
EM
LC
EC
FE
CL
MT
AT
AX
SU
BR
ST
RS
BT
HA
SC
IDX
POWER DOOR LOCK
Trouble Diagnoses (Cont’d)
EL-183
![](/vehicles/zatt/wheiso/zix/xpou.png)
DOOR LOCK/UNLOCK SWITCH CHECK
=NCEL0110S03
1
CHECK DOOR LOCK/UNLOCK SWITCH INPUT SIGNAL
1. Disconnect control unit connector.
2. Check continuity between control unit terminal 23 or 35 and ground.
MTBL0659
SEL875V
Refer to wiring diagram in EL-178.
OK or NG
OK
©
Door lock/unlock switch is OK.
NG
©
GO TO 2.
2
CHECK DOOR LOCK/UNLOCK SWITCH
1. Disconnect door lock/unlock switch connector.
2. Check continuity between each door lock/unlock switch terminals.
I
Power window main switch (Door lock/unlock switch)
SEL670W
OK or NG
OK
©
Check the following.
I
Ground circuit for door lock/unlock switch
I
Harness for open or short between door lock/unlock switch and control unit connector
NG
©
Replace door lock/unlock switch.
POWER DOOR LOCK
Trouble Diagnoses (Cont’d)
EL-184
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