Subaru XT 1988 Service Manual page 1408

6-3
WIRING DIAGRAM AND TROUBLESHOOTING
(2) Resume function or coasting function will not operate.
Check if the resume or coasting
Replace the sub-switch to
No
determine if the control unit
Yes
I
I
signal is transmitted from the
Replace the switch.
sub-switch.
provides the resume and/or
l
coasting functions normally.
Yes
I
No
Replace the cruise control unit
Yes
to determine if it operates nor-
Replace the cruise control unit.
mally.
No
Again install the old control unit,
Yes
replace the actuator, and see if it Replace the actuator.
operates normally.
No
Again install the old actuator,
Yes
replace the valve, and see if it Replace the valve.
operates normally:
No
Again install the old valve, re-
Yes
place the pump, and see if it ope-
Replace the pump.
rates normally.
No
Check wiring harness and hoses.
I
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