Subaru Legacy 2004 Service Manual page 2495

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
1 CHECK DTC OF TCM.
2 PREPARE SUBARU SELECT MONITOR.
3 CHECK INHIBITOR SWITCH.
1) Shift the select lever to "P" range.
2) Check input signal of inhibitor SW 1 — 4
and inhibitor SW 3 monitor using Subaru
Select Monitor.
4 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 between TCM con-
nector and chassis ground about the item
which indicated Low on step 3.
Connector & terminal
(B55) No. 4 — Chassis ground:
(B55) No. 3 — Chassis ground:
(B55) No. 14 — Chassis ground:
(B55) No. 13 — Chassis ground:
(B55) No. 20 — Chassis ground:
5 CHECK INHIBITOR SWITCH.
1) Shift the select lever to "D" range.
2) Check input signal of inhibitor SW 1 — 4
and inhibitor SW 3 monitor using Subaru
Select Monitor.
6 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
about the item which indicated High on step 5.
Connector & terminal
(B55) No. 4 — (B12) No. 4:
(B55) No. 3 — (B12) No. 3:
(B55) No. 14 — (B12) No. 2:
(B55) No. 13 — (B12) No. 1:
(B55) No. 20 — (B12) No. 8:
7 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. 4 — (B12) No. 4:
(B55) No. 3 — (B12) No. 3:
(B55) No. 14 — (B12) No. 2:
(B55) No. 13 — (B12) No. 1:
(B55) No. 20 — (B12) No. 8:
Check
Is DTC of AT CAN communica-
tion circuit displayed?
Do you have a Subaru Select
Monitor?
Are all indications High?
Is the resistance more than 1
M"?
Are all indications High?
Is the resistance less than 1
"?
Is the resistance less than 1
"?
5AT(diag)-36
Yes
Perform the diag- Go to step 2.
nosis according to
DTC.
Go to step 3. Go to step 7.
Go to step 5. Go to step 4.
Go to step 9. Repair the short
circuit in harness
between TCM con-
nector and chassis
ground.
Go to step 9. Go to step 6.
Go to step 9. Repair the open
circuit in harness
between TCM con-
nector and trans-
mission connector.
Go to step 8. Repair the open
circuit in harness
between TCM con-
nector and trans-
mission connector.
No