Toyota Celica Supra 1986 Service And Repair Manual page 639

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BODY ELECTRICAL SYSTEM-
Theft
Deterrent
System
BE-91
CONTINUED FROM
PREVIOUS PAGE
INSPECT
BACK DOOR KEY
UNLOCK
Inspect
back door
key
unlock switch.
SWITCH OPERATION
No
Is there continuity between
terminal
1 and
body ground with back
door
key unlock switch
turned on?
Yes
COMPUTER
Disconnect computer and inspect connector
on
wire harness side as
follows.
INSPECT POWER SOURCE
No
Open
circuit in
wire
harness between
Is
there battery
voltage
between terminal 5
and
fuse
and
tenninal 5
of computer.
body
ground?
Yes
I
NSPECT GROUND CONNECTION
No
Open circuit in
wire hamess
between
Is there continuity between terminal 10
and
terminal
10 of
computer and body
body ground?
ground.
Body.
ground
faulty.
Yes
INSPECT LH
KEY UNLOCK SWITCH
Yes
Short circuit in wire hamess between
CIRCUIT
terminal
9
of
comJ?Uter
and terminal 2
Is
there continuity between
terminal 9 and
of LH
key unlock
switch.
body ground
with
LH door
locked
with
key?
No
INSPECT
RH KEY UNLOCK SWITCH
Yes
Short
circuit in wire
harness between
CIRCUIT
terminal
9
of computer and
terminal
2
Is
there
continuity between
terminal9
and
body ground with RH
door locked with key?
of
RH
key
unlock
switch.
No
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