Subaru Legacy 2003 Service Manual page 2426

DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC)
Step
16 CHECK SPORT SHIFT SWITCH.
1) Move select lever to SPORT shift mode.
2) Measure resistance between SPORT shift
switch terminals.
Connector & terminal
(B237) No. 6 — No. 2:
Is the measured value less than the speci-
fied value?
17 CHECK HARNESS CONNECTOR BETWEEN
TCM AND SPORT SHIFT SWITCH.
1) Disconnect connector from TCM.
2) Measure resistance of harness between
TCM connector and SPORT shift switch
connector.
Connector & terminal
(B237) No. 2 — (B55) No. 13:
Is the measured value less than the speci-
fied value?
18 CHECK HARNESS CONNECTOR BETWEEN
TCM AND SPORT SHIFT SWITCH.
1) Disconnect connector from steering roll
connector.
2) Measure resistance of harness between
SPORT shift switch connector and chassis
ground.
Connector & terminal
(B237) No. 2 — Chassis ground:
Does the measured value exceed the spec-
ified value?
19 CHECK INPUT SIGNAL FOR TCM.
1) Connect all connectors.
2) Turn ignition switch to ON. (Engine is
stopped.)
3) Measure signal voltage for TCM.
Connector & terminal
(B55) No. 13 (+) — Chassis ground (–):
Does the measured value exceed the spec-
ified value?
20 CHECK INPUT SIGNAL FOR TCM.
1) Move select lever to shift up side.
2) Measure signal voltage for TCM.
Connector & terminal
(B55) No. 13 (+) — Chassis ground (–):
Is the measured value less than the speci-
fied value?
21 CHECK SPORT SHIFT SWITCH GROUND
LINE.
1) Turn ignition switch to OFF.
2) Disconnect connector from SPORT shift
switch.
3) Measure resistance of harness between
SPORT shift switch connector and chassis
ground.
Connector & terminal
(B237) No. 3 — Chassis ground:
Is the measured value less than the speci-
fied value?
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Value
1 Ω
1 Ω
1 MΩ
9 V
1 V
1 Ω
AT-151
Yes
Go to step 17. Replace guide
plate assembly.
Go to step 18. Repair open circuit
in harness
between SPORT
shift switch con-
nector and TCM
connector and
poor contact in
coupling connec-
tor.
Go to step 19. Repair short circuit
in harness
between SPORT
shift switch con-
nector and TCM
connector.
Go to step 20. Replace TCM.
<Ref. to AT-76,
Transmission Con-
trol Module
(TCM).>
Go to step 35. Replace TCM.
<Ref. to AT-76,
Transmission Con-
trol Module
(TCM).>
Go to step 22. Repair open circuit
in harness
between SPORT
shift switch and
chassis ground.
No