Subaru Legacy 2005 Service Manual page 2210

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
21 CHECK INPUT SIGNAL FOR TCM.
1) Turn the ignition switch to OFF.
2) Connect the connector to TCM and inhibitor
switch.
3) Turn the ignition switch to ON.
4) Shift the select lever to "R" range.
5) Measure the voltage between TCM and
chassis ground.
Connector & terminal
(B54) No. 14 (+) — Chassis ground (
22 CHECK INPUT SIGNAL FOR TCM.
1) Shift the select lever to other than "R"
range.
2) Measure the voltage between TCM and
chassis ground.
Connector & terminal
(B54) No. 14 (+) — Chassis ground (
23 CHECK BODY INTEGRATED MODULE.
Read the data of shift position from Subaru
Select Monitor. <Ref. to LAN(diag)-14, OPER-
ATION, Subaru Select Monitor.>
24 CHECK BODY INTEGRATED MODULE.
Check DTC of body integrated module.
25 CHECK COMBINATION METER.
Check the "R" range indicator light. <Ref. to
IDI-3, INSPECTION, Combination Meter Sys-
tem.>
26 CHECK HARNESS CONNECTOR BETWEEN
TCM AND INHIBITOR SWITCH.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from TCM,
inhibitor switch and combination meter.
3) Measure the resistance of harness
between TCM connector and chassis ground.
Connector & terminal
(B54) No. 14 — Chassis ground:
27 CHECK HARNESS CONNECTOR BETWEEN
TCM AND INHIBITOR SWITCH.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from TCM and
inhibitor switch.
3) Measure the resistance of harness
between TCM and inhibitor switch connector.
Connector & terminal
(B54) No. 22 — (T7) No. 10:
28 CHECK INPUT SIGNAL FOR TCM.
1) Turn the ignition switch to OFF.
2) Connect the connector to TCM and inhibitor
switch.
3) Turn the ignition switch to ON.
4) Shift the select lever to "N" range.
5) Measure the voltage between TCM and
chassis ground.
Connector & terminal
(B54) No. 22 (+) — Chassis ground (
Check
Is the voltage less than 1 V?
−
):
Is the voltage more than 8 V?
−
):
Is 6 displayed?
Is DTC of CAN communication
displayed?
Is the "R" range indicator light
OK?
Is the resistance more than 1
MΩ?
Is the resistance less than 1
Ω?
Is the voltage less than 1 V?
−
):
4AT(diag)-38
Yes
Go to step 22. Go to step 41.
Go to step 41. Replace the TCM.
<Ref. to 4AT-66,
Transmission Con-
trol Module
(TCM).>
Go to step 24. Check the body
integrated module.
Perform the diag- Go to step 25.
nosis according to
DTC.
Go to step 41. Replace the com-
bination meter
assembly. <Ref. to
IDI-15, Combina-
tion Meter.>
Go to step 41. Repair the ground
short circuit in "R"
range circuit.
Go to step 28. Repair the open
circuit of harness
between TCM and
inhibitor switch
connector, and
poor contact in
coupling connec-
tor.
Go to step 29. Go to step 41.
No