Toyota Hilux Surf 1993 Owner's Manual page 910

ECU
Disconnect connector from CC ECU and in–
spect connector on wire harness side as fol–
lows.
INSPECT VACUUM SWITCH CIRCUIT
Is there continuity between terminal 1 1 and
ground?
Start engine (idling).
Is there continuity between terminal 1 1 and
ground?
Stop the engine.
INSPECT VACUUM PUMP CIRCUIT
Is there continuity between terminal 2 and
ground?
Is there continuity between terminal 2 and
ground when disconnect connector from vac–
uum pump?
CC ECU faulty.
Replace CC ECU. Then recheck system.
BODY ELECTRICAL SYSTEM
CONTINUED FROM PREVIOUS PAGE
Yes
Yes
– Cruise Control System
Open circuit in wire harness between ter–
minal 1 1 of CC ECU and terminal 1 of vac–
uum switch.
Yes
Short circuit in wire harness between ter–
minal 1 1 of CC ECU and terminal 1 of vac–
uum switch.
Open circuit in wire harness between ter–
minal 2 of CC ECU and terminal 1 of vac–
uum switch.
Yes
Short circuit in wire harness between ter–
minal 2 of 'CC ECU and terminal 1 of vac–
uum pump.
BE–77