Subaru IMPREZA 2002 Service Manual page 204

DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
I
Check
When the brake pedal is
depressed, does the LED light
up?
Step
9 CHECK HARNESS CONNECTOR BETWEEN
TCM AND COMBINATION METER.
Measure the resistance of harness connector
between TCM and chassis ground to make
sure that circuit does not short.
Connector & terminal
(854) No. 12
-
Chassis ground:
10 CHECK OUTPUT SIGNAL EMITTED FROM
TCM.
1)Turn the ignition switch to OFF.
2)Connect the connector to TCM and combina-
tion meter.
3)Turn the ignition switch to ON.
4)Measure the signal voltage for TCM while
installing and removing the fuse to FWD switch
connector.
Connector & terminal
(854)
No.
12
-
Chassis ground:
11 CHECK OUTPUT SIGNAL EMITTED FROM
TCM.
Measure the signal voltage for TCM while
removing the fuse from FWD switch connector.
_.
.
Connector & terminal
(854) No. 12
-
Chassis ground:
12 CHECK POOR CONTACT.
Yes
Go to step CHECK
ABS SWITCH.
<Ref. to AT-1 13,
CHECK ABS
SWITCH., Diag-
nostic Procedure
for No-Diagnostic
Trouble Code
(DTC).>
C: CHECK BRAKE SWITCH.
Check
the resistance more than 1
n?
the voltage less than 1 V in
YD switch while installing?
the voltage more than 9 V in
'VD
switch while removing?
there poor contact in FWD
[itch circuit?
~~ ~
Yes
30 to step 1Q.
30 to step 11.
30
to step 12.
3epair poor con-
act.
No
Repair short circuii
,n harness
between TCM and
:ombination meter
zonnector.
So to step 12.
Replace the TCM.
<Ref. to AT-45,
Transmission Con.
trol Module
[TCM).>
Replace the TCM.
<Ref. to AT-45,
Transmission Con.
trol Module
(TCM).>
CHECK BRAKE SWITCH.
No
Check the brake
switch circuit.
AT-1 12