Subaru Legacy 2003 Service Manual page 2402

DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC)
Step
3 CHECK KICK-DOWN SWITCH.
Measure resistance for kick-down switch when
depressing the accelerator pedal.
Terminals
No. 1 — No. 2:
Is the measured value less than the specified
value?
4 CHECK KICK-DOWN SWITCH.
Measure resistance for kick-down switch when
pressing the accelerator pedal.
Terminals
No. 1 — No. 2:
Does the measured value exceed the specified
value?
5 CHECK HARNESS CONNECTOR BETWEEN
TCM AND KICK-DOWN SWITCH.
1) Turn ignition switch OFF.
2) Disconnect connectors from kick-down
switch.
3) Measure resistance of harness connector
between TCM and kick-down switch.
Connector & terminal
(B55) No. 11 — (B129) No. 2:
Is the measured value less than the speci-
fied value?
6 CHECK HARNESS CONNECTOR BETWEEN
TCM AND KICK-DOWN SWITCH.
Measure resistance of harness connector
between TCM and chassis ground.
Connector & terminal
(B55) No. 11 — Chassis ground:
Does the measured value exceed the specified
value?
7 CHECK INPUT SIGNAL FOR TCM.
1) Turn ignition switch to OFF.
2) Connect connector to kick-down switch.
3) Turn ignition switch ON (with engine OFF).
4) Measure signal voltage for TCM when
depressing the accelerator pedal.
Connector & terminal
(B55) No. 11 (+) — Chassis ground ( − − − − ):
Is the measured value less than the speci-
fied value?
8 CHECK INPUT SIGNAL FOR TCM.
Measure signal voltage for TCM when press-
ing the accelerator pedal.
Connector & terminal
(B55) No. 11 (+) — Chassis ground ( − − − − ):
Does the measured value exceed the specified
value?
9 CHECK POOR CONTACT.
Is there poor contact?
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Value
1 Ω
1 MΩ
1 Ω
1 MΩ
1 V
6.5 V
There is poor contact.
AT-127
Yes
Go to step 4. Replace kick-down
switch.
Go to step 5. Replace kick-down
switch.
Go to step 6. Repair open circuit
in harness
between TCM and
kick-down switch.
Go to step 7. Repair short circuit
in harness
between TCM and
chassis ground.
Go to step 8. Go to step 9.
A temporary poor Go to step 9.
contact of the con-
nector and har-
ness may be the
cause. Repair har-
ness and connec-
tor in the TCM.
Repair poor con- Replace TCM.
tact. <Ref. to AT-76,
Transmission Con-
trol Module
(TCM).>
No