Subaru Legacy 2002 Service Manual page 3341

DIAGNOSTICS CHART WITH TROUBLE CODE
Cruise Control System (Diagnostics)
No.
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 (−):
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 (−):
3 MEASURE RESISTANCE OF ACTUATOR.
Measure resistance of cruise control actuator
motor.
Terminals
No. 4 — No. 1:
No. 4 — No. 2:
No. 4 — No. 5:
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. 1 — (B94) No. 7:
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. 5 — (B94) No. 5:
Step
Is the voltage more than 10
V?
Is resistance less than 10
Ω?
Is resistance approximately
5 Ω?
Is resistance less than 10
Ω?
Is resistance less than 10
Ω?
CC-34
Check Yes
Go to step 2.
Go to step 3.
Go to step 4.
Go to step 5.
Replace cruise
control module.
<Ref. to CC-6,
Cruise Control
Module.>
No
Check harness for
open or short
between cruise
control module
and cruise control
actuator.
Repair harness.
Replace cruise
control actuator.
<Ref. to CC-4,
Actuator.>
Repair harness.
Repair harness.