Subaru 2002 IMPREZA Service Manual page 1696

DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
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
(B56) No. 2 — 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
(B56) No. 2 (+) — 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
(B56) No. 2 (+) — Chassis ground ( − − − − ):
12 CHECK POOR CONTACT.
C: CHECK BRAKE SWITCH.
Step
1 CHECK BRAKE SWITCH.
Check
Is the resistance more than 1
MΩ?
Is the voltage less than 1 V in
FWD switch while installing?
Is the voltage between 6 and
9.1 V in FWD switch while
removing?
Is there poor contact in FWD
switch circuit?
Check
When the brake pedal is
depressed, does LED light up?
AT-110
Yes
Go to step 10. Repair the short
circuit in harness
between TCM and
combination meter
connector.
Go to step 11. Go to step 12.
Go to step 12. Replace the TCM.
<Ref. to AT-46,
Transmission Con-
trol Module
(TCM).>
Repair the poor Replace the TCM.
contact. <Ref. to AT-46,
Transmission Con-
trol Module
(TCM).>
Yes
Go to step CHECK Check the brake
ABS SWITCH. switch circuit.
<Ref. to AT-111, <Ref. to EN-224,
CHECK ABS DTC P0703 —
SWITCH., Diag- BRAKE SWITCH
nostic Procedure INPUT MAL-
for No-diagnostic FUNCTION —,
Trouble Code Diagnostic Proce-
(DTC).> dure with Diagnos-
tic Trouble Code
(DTC).>
No
No