Stop Light Switch Circuit Inspection - Toyota Hilux Surf 1993 Owner's Manual

BE–72
INSPECTION OF STOP LIGHT SWITCH CIRCUIT
Turn ignition switch
off.
Is STOP fuse normal?
STOP LIGHT
SWITCH
INSPECT GROUND CONNECTION
Disconnect connector from stop light switch.
Is there continuity between terminal 3 of wire
harness side connector and ground?
INSPECT STOP LIGHT SWITCH CONTINUITY
Is stop light switch continuity normal?
(See page BE–80).
Connect connector to stop light switch.
ECU
Disconnect connector from CC ECU and in–
spect connector on wire harness side as fol–
lows.
INSPECT STOP FUSE CIRCUIT
Is there battery positive voltage between
terminal 17 and ground with brake pedal
released?
Is there battery positive voltage between
terminal 17 and ground with brake pedal
depressed?
CC ECU faulty.
Replace CC ECU. Then recheck system.
BODY ELECTRICAL SYSTEM
Replace fuse.
Is operation nor–
mal?
Yes
Yes
Fuse faulty.
Yes
Yes
Yes
– Cruise Control System
Short circuit in wire harness between termi–
nal 18 of CC ECU or terminal 1 of stop light
switch and fuse.
• Open circuit in wire harness between
terminal 3 and ground.
• Bulb burned out.
• Ground faulty.
Stop light faulty.
Replace stop light switch. Then recheck
system.
Yes
Short circuit in wire harness between ter–
minal 17 of CC ECU and STOP fuse.
Open circuit in wire harness between ter–
minal 17 of CC ECU and STOP fuse.