CC(H4DOTC 2.5)-17
CRUISE CONTROL SYSTEM (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
Check
Yes
No
1
CHECK CRUISE CONTROL MAIN SWITCH
CIRCUIT.
1) Turn the ignition switch to OFF.
2) Disconnect the ECM harness connector.
3) Turn the ignition switch to ON.
4) Measure the voltage between harness con-
nector terminal and chassis ground when the
main switch is pressed and is not pressed.
Connector & terminal
(B136) No. 7 (+) — Chassis ground (
−
):
Is the voltage 0 V when the
main switch is not pressed? Is
the voltage more than 10 V
when the main switch is
pressed?
• Check the fuse
No. 18 (in fuse &
relay box).
• Check the har-
ness for open or
short between
cruise control
command switch
and fuse & relay
box. If no malfunc-
tion is found after
checking above,
Go to step
2
CHECK SET/COAST SWITCH CIRCUIT.
1) Turn the ignition switch to OFF.
2) Disconnect the ECM harness connector.
3) Measure the voltage between harness con-
nector terminal and chassis ground when SET/
COAST switch is pressed and not pressed.
Connector & terminal
(B136) No. 11 (+) — Chassis ground (
−
):
Is the voltage 0 V when SET/
COAST switch is not pressed?
Is the voltage more than 10 V
when SET/COAST switch is
pressed?
3
CHECK RESUME/ACCEL SWITCH CIRCUIT.
Measure the voltage between harness connec-
tor terminal and chassis ground when
RESUME/ACCEL switch is pressed and not
pressed.
Connector & terminal
(B136) No. 10 (+) — Chassis ground (
−
):
Is the voltage 0 V when
RESUME/ACCEL switch is not
pressed? Is the voltage more
than 10 V when RESUME/
ACCEL switch is pressed?
4
CHECK CANCEL SWITCH CIRCUIT.
Measure the voltage between harness connec-
tor terminal and chassis ground when CAN-
CEL switch is pressed and not pressed.
Connector & terminal
(B136) No. 10 (+) — Chassis ground (
−
):
(B136) No. 11 (+) — Chassis ground (
−
):
Is the voltage 0 V when CAN-
CEL switch is not pressed? Is
the voltage more than 10 V
when CANCEL switch is
pressed?
Cruise control
command switch
circuit is OK.
5
CHECK POWER SUPPLY FOR COMMAND
SWITCH.
Check the horn operation.
Does the horn sound?
• Check the fuse
No. 6 (in main fuse
box).
• Check the horn
relay. <Ref. to
COM-3, HORN
RELAY, INSPEC-
TION, Horn Sys-
tem.>
• Check the har-
ness for open or
short between
cruise control
command switch
and fuse & relay
box.
6
CHECK CRUISE CONTROL COMMAND
SWITCH.
Remove and check the cruise control com-
mand switch. <Ref. to CC-9, Cruise Control
Command Switch.>
Is the cruise control command
switch OK?
Check the harness
between cruise
control command
switch and ECM.
Replace the cruise
control command
switch.
Содержание 2004 Forester
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