Nissan Terrano r20e. Manual — part 263
DIAGNOSTIC PROCEDURE 1-(2)
(Hood switch check)
CHECK HOOD SWITCH INPUT SIGNAL.
Remove time control unit from fuse block.
Note: Junction block (J/B) is very frag-
ile. TCU should be removed carefully
to avoid breaking the locking bars.
Check continuity between control unit ter-
minal
U32
and ground.
OK
E
OK
Hood switch is OK.
CHECK HOOD SWITCH.
1. Disconnect hood switch connector.
2. Check continuity between hood switch
terminals.
OK
E
NG
Replace hood switch.
Check the following.
I
Hood switch ground circuit
I
Harness for open or short between con-
trol unit and hood switch
Condition
Continuity
Hood is open.
Yes
Hood is closed.
No
Terminals
Condition
Continuity
q
1
-
q
2
Pushed
No
Released
Yes
YEL339D
YEL340D
H
H
THEFT WARNING SYSTEM
Trouble Diagnoses (Cont’d)
EL-235
DIAGNOSTIC PROCEDURE 2
(Security indicator check)
CHECK INDICATOR LAMP OUTPUT
SIGNAL.
1) Remove time control unit from fuse
block.
Note: Junction block (J/B) is very
fragile. TCU should be removed
carefully to avoid breaking the lock-
ing bars.
2) Check voltage between time control
unit terminal
U18
and ground.
Battery voltage should exist.
NG
E
OK
Security indicator lamp is
OK.
CHECK INDICATOR LAMP.
OK
E
NG
Replace indicator lamp.
CHECK POWER SUPPLY CIRCUIT FOR
INDICATOR.
1) Disconnect security indicator connec-
tor.
2) Check voltage between indicator termi-
nal
q
27
and ground.
Battery voltage should exist.
OK
E
NG
Check the following:
I
10A fuse [No.
16
,
located in the fuse block
(J/B)]
I
Harness for open or
short between combina-
tion meter and fuse
Check harness for open or short between
security indicator and time control unit.
YEL603D
YEL341D
H
H
H
THEFT WARNING SYSTEM
Trouble Diagnoses (Cont’d)
EL-236
DIAGNOSTIC PROCEDURE 3
(Door unlock sensor check)
CHECK DOOR UNLOCK SENSOR INPUT SIG-
NAL.
Remove time control unit from fuse block.
Note: Junction block (J/B) is very fragile.
TCU should be removed carefully to avoid
breaking the locking bars.
Check continuity between time control unit termi-
nals
q
25
,
q
35
,
q
36
and ground.
NG
E
OK
Door unlock sensor
is OK.
CHECK DOOR UNLOCK SENSOR.
1. Disconnect door unlock sensor connector.
2. Check continuity between door unlock sensor
terminals.
OK
E
NG
Replace door
unlock sensor.
Check the following:
I
Door unlock sensor ground circuit
I
Harness for open or short between control unit
and door unlock sensor
Terminals
Condition
Continuity
!
@
Driver
side door
U35
Ground
Locked
No
Unlocked
Yes
Passen-
ger
side door
U36
Ground
Locked
No
Unlocked
Yes
Rear
door
U25
Ground
Locked
No
Unlocked
Yes
Terminals
Condition
Continuity
Front with
super lock
and rear
q
2
-
q
5
Locked
No
Unlocked
Yes
Front with-
out super
lock
q
2
-
q
4
Locked
No
Unlocked
Yes
YEL342D
YEL343D
H
H
THEFT WARNING SYSTEM
Trouble Diagnoses (Cont’d)
EL-237
DIAGNOSTIC PROCEDURE 4
(Door key cylinder switch check)
CHECK DOOR KEY CYLINDER SWITCH
INPUT SIGNAL (LOCK SIGNAL).
Remove time control unit from fuse block.
Note: Junction block (J/B) is very frag-
ile. TCU should be removed carefully
to avoid breaking the locking bars.
Check continuity between time control
unit connector terminal
U29
and ground.
NG
E
OK
Door key cylinder switch is
OK.
CHECK DOOR KEY CYLINDER
SWITCH.
1) Disconnect door key cylinder switch
connector.
2) Check continuity between door key
cylinder switch terminals.
OK
E
NG
Replace key cylinder
switch.
Check the following:
I
Harness connectors between key cylin-
der switch and time control unit
I
Door key cylinder switch ground circuit
I
Harness for open or short-circuit
between super lock control unit and
door key cylinder.
Key cylinder switch operation
Continuity
Between neutral and lock
Yes
Unlock/neutral
No
Terminals
Key position
Continuity
q
1
-
q
2
Neutral
No
Between neu-
tral and lock
Yes
Unlock/neutral
No
Full stroke
(Lock)
No
NEL613
NEL614
H
H
THEFT WARNING SYSTEM
Trouble Diagnoses (Cont’d)
EL-238
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