Subaru Impreza 2002 Service Manual page 3722

Step
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 ( − − − − ):
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 ( − − − − ):
3 CHECK STOP LIGHT SWITCH AND BRAKE
SWITCH CIRCUIT.
1)Turn the cruise control main switch and igni-
tion switch to OFF.
2)Disconnect the cruise control module har-
ness connector.
3)Measure the resistance between cruise con-
trol 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:
4 CHECK STOP LIGHT SWITCH AND BRAKE
SWITCH.
Remove and check the stop light switch and
brake switch. <Ref. to CC-7, Stop and Brake
Switch.>
DIAGNOSTICS CHART WITH SYMPTOM
Is the voltage more than 10 V? Go to step 2.
Is the voltage more than 10 V? Go to step 3.
Is the resistance less than 10
Ω?
Are the stop light switch and
brake switch OK?
CRUISE CONTROL SYSTEM (DIAGNOSTICS)
Check
CC-23
Yes
• 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.
• Check the har-
ness for open or
short between
stop light/brake
switch and cruise
control module
(AT).
• Check the clutch
switch and circuit
(MT).
Go to step 4. Repair the har-
ness.
Stop light switch Replace the stop
and brake switch light switch and
circuit are OK. brake switch.
No