Subaru 2009 IMPREZA Service Manual page 3300

Step
1 CHECK CRUISE CONTROL COMMAND
SWITCH CIRCUIT.
1) Remove the driver's airbag module. <Ref. to
AB-15, REMOVAL, Driver's Airbag Module.>
2) Disconnect the harness connector of cruise
control command switch.
3) Turn the ignition switch to ON.
4) Measure the voltage between harness con-
nector terminal and chassis ground.
Connector & terminal
(ST3) No. 8 (+) — Chassis ground (–):
(ST3) No. 7 (+) — Chassis ground (–):
2 CHECK CRUISE CONTROL COMMAND
SWITCH CIRCUIT.
1) Turn the ignition switch to OFF.
2) Remove the cruise control command
switch. <Ref. to CC-5, REMOVAL, Cruise Con-
trol Command Switch.>
3) Measure the resistance between harness
connector terminal and chassis ground.
Connector & terminal
(ST3) No. 6 — Chassis ground:
3 CHECK CRUISE CONTROL COMMAND
SWITCH.
Measure the resistance between switch termi-
nals when the cruise control command switch is
not depressed.
Terminals
No. 6 — No. 7:
4 CHECK CANCEL SWITCH.
1) Turn the ignition switch to OFF.
2) Remove the cruise control command
switch. <Ref. to CC-5, REMOVAL, Cruise Con-
trol Command Switch.>
3) Measure the resistance between switch ter-
minals with the CANCEL switch pressed.
Terminals
No. 6 — No. 7:
5 CHECK SET/COAST SWITCH.
Measure the resistance between switch termi-
nals with the SET/COAST switch pressed.
Terminals
No. 6 — No. 7:
6 CHECK RESUME/ACCEL SWITCH CIRCUIT.
Measure the resistance between switch termi-
nals with the RESUME/ACCEL switch pressed.
Terminals
No. 6 — No. 7:
Diagnostic Procedure with Cancel Code
Is the voltage 5 V or more?
Is the resistance less than 10 ? Go to step 3.
Is the resistance approx. 4 k ? Go to step 4.
Is the resistance approx. less
than 1
switch is pressed?
Is the resistance approx. 250
when SET/COAST switch is
pressed?
Is the resistance approx. 1,500
switch is pressed?
CC(diag)-15
CRUISE CONTROL SYSTEM (DIAGNOSTICS)
Check
when the CANCEL
when RESUME/ACCEL
Yes No
Go to step 2. Check the harness
between cruise
control command
switch and ECM,
and the steering
roll connector for
open or short cir-
cuit, or for poor
contact.
Check for open cir-
cuit between
cruise control com-
mand switch,
ECM, and chassis
ground and check
the ECM.
Replace the cruise
control command
switch. <Ref. to
CC-5, Cruise Con-
trol Command
Switch.>
Go to step 5. Replace the cruise
control command
switch. <Ref. to
CC-5, Cruise Con-
trol Command
Switch.>
Go to step 6. Replace the cruise
control command
switch. <Ref. to
CC-5, Cruise Con-
trol Command
Switch.>
Replace the ECM. Replace the cruise
<Ref. to control command
FU(H4SO)-44, switch. <Ref. to
Engine Control CC-5, Cruise Con-
Module (ECM).> trol Command
<Ref. to Switch.>
FU(H4DOTC)-52,
Engine Control
Module (ECM).>