Subaru Forester 2004 - Page 554

CC(H4SO)-22
CRUISE CONTROL SYSTEM (DIAGNOSTIC)
Diagnostic Procedure with Symptom
Step Check Yes No
1 CHECK STOP LIGHT SWITCH AND BRAKE
SWITCH CIRCUIT.
1) Turn the ignition switch to OFF.
2) Disconnect the stop light switch and brake
switch harness connector.
3) Turn the ignition switch to ON.
4) Turn the cruise control main switch to ON.
5) Measure the voltage between harness con-
nector terminal and chassis ground.
Connector & terminal
(B65) No. 2 (+) — Chassis ground (
− ):
Is the voltage more than 10 V? Go to step 2. • Check the fuse
No. 16 (in fuse &
relay box).
• Check the har-
ness for open or
short between
stop light/brake
switch and fuse &
relay box.
2 CHECK STOP LIGHT SWITCH AND BRAKE
SWITCH CIRCUIT.
Measure the voltage between harness connec-
tor terminal and chassis ground.
Connector & terminal
(B65) No. 4 (+) — Chassis ground (
− ):
Is the voltage more than 10 V? Go to step 3. • Check the har-
ness for open or
short between
stop light/brake
switch and cruise
control module (AT
model).
• Check the clutch
switch and circuit
(MT model).
3 CHECK STOP LIGHT SWITCH AND BRAKE
SWITCH CIRCUIT.
1) Turn the cruise control main switch and
ignition switch to OFF.
2) Disconnect the cruise control module har-
ness connector.
3) Measure the resistance between cruise
control module harness connector terminal
and stop light switch and brake switch harness
connector terminal.
Connector & terminal
(B94) No. 20 — (B65) No. 3:
(B94) No. 16 — (B65) No. 1:
Is the resistance less than 10
Ω?
Go to step 4. Repair the har-
ness.
4 CHECK STOP LIGHT SWITCH AND BRAKE
SWITCH.
Remove and check the stop light switch and
brake switch. <Ref. to CC-10, Stop and Brake
Switch.>
Are the stop light switch and
brake switch are OK?
Stop light switch
and brake switch
circuit are OK.
Replace the stop
light switch and
brake switch.