Subaru Legacy 2003 Service Manual page 4004

Step
1 CHECK POWER SUPPLY.
1) Turn ignition switch OFF.
2) Disconnect cruise control module harness
connector.
3) Turn ignition switch ON.
4) Measure voltage between harness connec-
tor terminal and chassis ground.
Connector & terminal
(B94) No. 12 (+) — Chassis ground ( − − − − ):
Does the measured value exceed the spec-
ified value?
2 CHECK GROUND CIRCUIT.
1) Turn ignition switch OFF.
2) Measure resistance between harness con-
nector terminal and chassis ground.
Connector & terminal
(B94) No. 6 — Chassis ground:
Is the measured value less than the speci-
fied value?
DIAGNOSTICS CHART WITH SYMPTOM
CRUISE CONTROL SYSTEM (DIAGNOSTICS)
Value
10 V
10 Ω
CC-15
Yes
Go to step 2. • Check fuse No.
18 (in fuse & relay
box).
• Check harness
for open or short
between cruise
control module
and fuse & relay
box.
Power supply and Repair harness.
ground circuit are
OK.
No