Subaru 2002 IMPREZA Service Manual page 591

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
Step
CHECK HARNESS BETWEEN TCM AND
CCM CONNECTOR.
1)Turn the ignition switch to OFF.
2)Disconnect the connectors from TCM and
CCM.
3)Measure the resistance of harness between
TCM and CCM connector.
Connector & terminal
I
(655)
NO.
22
-
(694)
NO.
3 :
!
CHECK HARNESS BETWEEN TCM AND
CCM CONNECTOR.
Measure the resistance of harness between
TCM and chassis ground.
Connector & terminal
(655) No. 22
-
Chassis ground:
CHECK INPUT SIGNAL FOR TCM.
Check
Is the resistance less than
1
R?
Is the resistance less than 10
n?
Is the resistance less than 1 V'
1)Connect the connector to TCM and CCM.
2)Lift-up the vehicle or set the vehicle on free
rollers.
CAUTION:
On AWD models, raise all wheels off
ground.
3)Start the engine.
4)Turn the cruise control main switch to ON.
5)Move selector lever to " D and slowly
increase vehicle speed to 50 km/h (31 MPH).
6)Turn the cruise control command switch to
ON.
7)Measure the voltage between TCM and
chassis ground.
Connector & terminal
(655) No. 11 (+)
-
Chassis ground (-):
I CHECK POOR CONTACT.
Check poor contact in TCM connector.
I S
there poor contact in TCM
Zonnector?
I
Yes
20
to step 2.
3epair short circuit
n harness
letween TCM and
X M connector.
20 to step 4.
3epair poor con-
act in TCM con-
lector.
No
Repair open circuit
in harness
between TCM and
CCM connector.
Go to step
3 .
Check cruise con-
trol command
switch circuit.
<Ref. to CC-7,
INSPECTION,
Cruise Control
Command
Switch. >
Replace the TCM.
<Ref. to AT-45,
Transmission Con-
trol Module
(TCM).>
EN(D0HC TURBO)-367