Subaru Legacy 2005 Service Manual page 2202

Diagnostic Procedure for Subaru Select Monitor Communication
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
17 CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND TRANSMISSION
GROUND.
Measure the resistance of harness between
transmission and transmission ground.
Connector & terminal
(T4) No. 19 — Transmission ground:
(T4) No. 20 — Transmission ground:
18 CHECK POOR CONTACT IN CONNECTORS. Is there poor contact in TCM
Check
Is the resistance less than 1
Ω?
power supply, ground and data
link connector?
4AT(diag)-30
Yes
Go to step 18. Repair the open
circuit of harness
between transmis-
sion and transmis-
sion ground.
Repair the con- Replace the TCM.
nector. <Ref. to 4AT-66,
Transmission Con-
trol Module
(TCM).>
No