Parking Brake Switch Circuit Inspection - Toyota Hilux Surf 1993 Owner's Manual

INSPECTION OF PARKING BRAKE SWITCH CIRCUIT
Turn ignition switch off.
BRAKE FLUID LEVEL
WARNING SWITCH
INSPECT GROUND CONNECTION
Disconnect connector from brake fluid level
warning switch.
Is there continuity between terminal 2 of wire
harness side connector and ground?
INSPECT BRAKE WARNING SWITCH
Is brake fluid level warning switch operation
normal?
(See page BE–38)
Connect the connector to brake warning
switch.
PARKING BRAKE SWITCH
INSPECT GROUND CONNECTION
Disconnect connector from parking brake
switch.
Is there continuity between terminal 2 of wire
harness side connector and ground?
INSPECT PARKING BRAKE SWITCH OPERATION
Is parking brake switch operation normal?
(See page BE–40)
Connect connector to parking brake switch.
ECU
Disconnect connector from CC ECU and
inspect connector on wire harness side as
follows.
Ignition switch turned on.
Is there no voltage between terminal 14 and
ground with parking brake lever pulled up?
Is there battery positive voltage between ter–
minal 14 and body ground with parking brake
released?
CC ECU faulty.
Replace CC ECU. Then recheck system.
BODY ELECTRICAL SYSTEM
Yes
Yes
Yes
Yes
Yes
Yes
– Cruise Control System
• Open circuit in wire harness between
terminal 2 of brake fluid level warning
switch.
• Ground faulty.
Brake warning switch faulty.
Replace brake warning switch.
• Open circuit in wire harness between
terminal 2 of parking brake switch.
• Ground faulty.
Replace parking brake switch.
Open circuit in wire harness between ter–
minal 14 of ECU and terminal 1 of parking
brake switch or brake warning light.
Short circuit in wire harness between ter–
minal 14 of ECU and terminal 1 of parking
brake switch, terminal 1 of brake fluid level
warning switch or brake warning light.
BE–73