Subaru Impreza 2003 Service Manual page 3272

CRUISE CONTROL SYSTEM (DIAGNOSTICS)
Step
7 CHECK TRANSMISSION CONTROL MOD-
ULE.
1)Connect the harness connector to transmis-
sion control module.
2)Lift-up the vehicle and support with safety
stands.
3)Drive the vehicle faster than 10 km/h (6
MPH).
Warning:
Be careful not to be caught by the running
wheels.
4)Measure the voltage between transmission
control module harness connector terminal
and chassis ground.
Connector & terminal
(B56) No. 17 (+) — Chassis ground ( − − − − ):
DIAGNOSTIC PROCEDURE WITH DTC
Is the voltage less than 1 V
←→ more than 5 V?
CC-28
Check
Replace the cruise
control module.
<Ref. to CC-4,
Cruise Control
Module.>
Yes No
Replace the trans-
mission control
module. <Ref. to
4AT-70, Transmis-
sion Control Mod-
ule (TCM).>