Subaru Legacy 2004 Service Manual page 2487

Diagnostic Procedure for Select Monitor Communication
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
9 CHECK INSTALLATION OF TCM CONNEC-
TOR.
Turn the ignition switch to OFF.
10 CHECK INSTALLATION OF TRANSMISSION
HARNESS CONNECTOR.
11 CHECK POOR CONTACT IN CONNECTORS. Is there poor contact in control
12 CHECK POWER SUPPLY OF TCM.
1) Disconnect the connector from TCM.
2) Turn the ignition switch to ON.
3) Measure the voltage between TCM con-
nector and chassis ground.
Connector & terminal
(B54) No. 1 (+) — Chassis ground (
13 CHECK FUSE (No. 32).
1) Turn the ignition switch to OFF.
2) Remove the fuse (No. 32).
14 CHECK HARNESS.
Measure the resistance between TCM connec-
tor and chassis ground.
Connector & terminal
(B54) No. 1 — Chassis ground:
15 CHECK IGNITION POWER SUPPLY CIR-
CUIT.
1) Turn the ignition switch to ON (engine
OFF).
2) Measure the ignition power supply voltage
between TCM connector and chassis ground.
Connector & terminal
(B55) No. 1 (+) — Chassis ground (
(B55) No. 10 (+) — Chassis ground (
16 CHECK FUSE (No. 12).
Remove the fuse (No. 12).
Check
Is TCM connector connected
to TCM?
Is the transmission harness
connector connected to bulk-
head harness connector?
unit power supply and data link
connector?
Is the voltage 10 — 13 V?
$
):
Is the fuse (No. 32) blown out? Go to step 14.
Is the resistance less than 10
"?
Is the voltage 10 — 13 V?
$
):
$
):
Is the fuse (No. 12) blown out? Replace the fuse
5AT(diag)-28
Yes
Go to step 10. Connect the TCM
connector to TCM.
Go to step 11. Connect the bulk-
head harness con-
nector to
transmission har-
ness connector.
Repair the poor Go to step 12.
contact.
Go to step 15. Go to step 13.
Repair the open
circuit in harness
between fuse (No.
32) and TCM, or
fuse (No. 32) and
battery, and poor
contact in cou-
pling connector.
Replace the fuse Replace the fuse
(No. 32). If the (No. 32).
replaced fuse (No.
32) has blown out
easily, repair the
short circuit in har-
ness between fuse
(No. 32) and TCM.
Go to step 17. Go to step 16.
Repair the open
(No. 12). If the circuit in harness
replaced fuse (No. between fuse (No.
12) has blown out 12) and TCM, or
easily, repair the fuse (No. 12) and
short circuit in har- battery, and poor
ness between fuse contact in cou-
(No. 12) and TCM. pling connector.
No