Subaru Legacy 2002 Service Manual page 1542

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
No.
1 CHECK HARNESS BETWEEN TCM AND
CCM CONNECTOR.
1) Turn ignition switch to OFF.
2) Disconnect connectors from TCM and
CCM.
3) Measure resistance of harness between
TCM and CCM connector.
Connector & terminal
(B55) No. 22 — (B94) No. 3:
2 CHECK HARNESS BETWEEN TCM AND
CCM CONNECTOR.
Measure resistance of harness between TCM
and chassis ground.
Connector & terminal
(B55) No. 22 — Chassis ground:
3 CHECK INPUT SIGNAL FOR TCM.
1) Connect 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) Cruise control main switch to ON.
5) Move selector lever to "D" and slowly
increase vehicle speed to 50 km/h (31 MPH).
6) Cruise control command switch to ON.
7) Measure voltage between TCM and chas-
sis ground.
Connector & terminal
(B55) No. 22 (+) — Chassis ground (−):
4 CHECK POOR CONTACT.
Check poor contact in TCM connector.
Step
Is the resistance less than
1 Ω?
Is the resistance less than
10 Ω?
Is the resistance less than
1 V?
Is there poor contact in
TCM connector?
EN(H6)-335
Check Yes
Go to step 2.
Repair short cir-
cuit in harness
between TCM and
CCM connector.
Go to step 4.
Repair poor con-
tact in TCM con-
nector.
Engine (DIAGNOSTICS)
No
Repair open cir-
cuit in harness
between TCM and
CCM connector.
Go to step 3.
Check cruise con-
trol command
switch circuit.
<Ref. to CC-8,
INSPECTION,
Cruise Control
Command
Switch.>
Replace TCM.
<Ref. to AT-49,
Transmission
Control Module
(TCM).>