4AT(diag)-29
Diagnostic Procedure for Subaru Select Monitor Communication
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
17
CHECK FUSE (NO. 12).
Remove the fuse (F/B No. 12).
Is the fuse (No. 12) blown out? Replace the fuse
(No. 12). If the
replaced fuse (No.
12) has blown out
easily, repair short
circuit of harness
between fuse (No.
12) and TCM.
Repair the open
circuit of harness
between fuse (No.
12) and TCM, or
fuse (No. 12) and
battery, and poor
contact of the con-
nector.
18
CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from TCM and
transmission.
3) Measure the resistance of harness between
TCM and transmission connector.
Connector & terminal
(B55) No. 20 — (B11) No. 20:
(B55) No. 21 — (B11) No. 20:
(B55) No. 22 — (B11) No. 19:
(B55) No. 23 — (B11) No. 19:
Is the resistance less than 1
:? Go to step 19.
Repair the open
circuit of harness
between TCM and
transmission har-
ness connector,
and poor contact of
connector.
19
CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND TRANSMISSION
GROUND.
Measure the resistance of the harness between
transmission and transmission ground.
Connector & terminal
(T4) No. 19 — Transmission ground:
(T4) No. 20 — Transmission ground:
Is the resistance less than 1
:? Go to step 20.
Repair the open
circuit of the har-
ness between
transmission and
transmission
ground.
20
CHECK POOR CONTACT IN CONNECTORS. Is there poor contact in TCM
power supply, ground and data
link connector?
Repair the connec-
tor.
Replace the TCM.
<Ref. to 4AT-61,
Transmission Con-
trol Module
(TCM).>
Step
Check
Yes
No