Subaru Legacy 2003 Service Manual page 4024

DIAGNOSTICS CHART WITH TROUBLE CODE
Step
1 CHECK POWER SUPPLY.
1) Turn ignition switch OFF.
2) Disconnect harness connector from cruise
control actuator.
3) Turn ignition switch ON.
4) Turn cruise control main switch ON.
5) Measure voltage between cruise control
actuator harness connector terminal and
chassis ground.
Terminals
(B7) No. 4 (+) — Chassis ground ( − − − − ):
Does the measured value exceed the spec-
ified value?
2 CHECK GROUND CIRCUIT OF ACTUATOR.
1) Turn ignition switch and cruise control main
switch OFF.
2) Measure resistance between cruise control
actuator harness connector terminal and
chassis ground.
Terminals
(B7) No. 6 — Chassis ground:
Is the measured value less than the speci-
fied value?
3 MEASURE RESISTANCE OF ACTUATOR
CLUTCH.
Measure resistance of cruise control actuator
clutch.
Terminals
No. 3 — No. 6:
Is the measured value same as the specified
value?
4 CHECK HARNESS BETWEEN ACTUATOR
AND CRUISE CONTROL MODULE.
1) Disconnect harness connector from cruise
control module.
2) Measure resistance between cruise control
module harness connector terminal and
cruise control actuator harness connector
terminal.
Connector & terminal
(B7) No. 2 — (B94) No. 13:
Is the measured value less than the speci-
fied value?
5 CHECK HARNESS BETWEEN ACTUATOR
AND CRUISE CONTROL MODULE.
Measure resistance between cruise control
module harness connector terminal and cruise
control actuator harness connector terminal.
Connector & terminal
(B7) No. 3 — (B94) No. 14:
Is the measured value less than the specified
value?
CRUISE CONTROL SYSTEM (DIAGNOSTICS)
Value
10 V
10 Ω
Approximately 39 Ω
10 Ω
10 Ω
CC-35
Yes
Go to step 2. Check harness for
open or short
between cruise
control module
and cruise control
actuator.
Go to step 3. Repair harness.
Go to step 4. Replace cruise
control actuator.
<Ref. to CC-4,
Actuator.>
Go to step 5. Repair harness.
Replace cruise Repair harness.
control module.
<Ref. to CC-6,
Cruise Control
Module.>
No