Toyota Celica Supra 1986 Service And Repair Manual page 621

BODY ELECTRICAL SYSTEM - Cruise Control System BE-73
CONTINUED FROM PREVIOUS PAGE
Yes
Is there continuity between terminal 30 and
Yes
I
Inspect control switch.
I
body
ground with set/coast switch turned off 7
'
No
INSPECT ACCEL/RESUME SWITCH Inspect the control switch.
OPERATION
No
Is there continuity between terminal 28 and
body
ground when accel/resume switch
turned on?
Yes
s
TOP LIGHT S/W
INSPECT RELEASE VALVE CIRCUIT • Open or short circuit in wire harness
Disconnect connector from computer.
between terminal 4 of stop light switch
Is resistance value about 68
n
between
and terminal 3 of actuator.
terminal 1 and terminal 2 of computer with
No
• Open circuit in wire harness between
brake pedal returned 7
terminal 1 of actuator and terminal 2 of
computer.
• Inspect stop light switch.
• Inspect actuator.
Yes
INSPECT STOP LIGHT SWITCH OPERATION
No
Inspect stop light switch.
Is there continuity between terminals 1 and 2
with brake pedal depressed 7
Yes
c
QMPUTER
Disconnect computer and inspect connector
on wire harness side as follows.
INSPECT POWER SOURCE
No
Open or short circuit in wire harness between
Is there battery voltage between terminal 7
terminal 7 of computer and terminal 3 of
and body ground with main switch turned on 7
main switch.
Yes
INSPECT GROUND CONNECTION No
• Open circuit in wire harness between
Is there continuity between terminal 10 and
terminal 10 and body ground.
body ground ?
• Body ground faulty.
Yes
I E
p
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