Read Diagnostic Trouble Code (Dtc) - Subaru 2003 LEGACY Service Manual

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

7. Read Diagnostic Trouble Code (DTC)

A: OPERATION
1. WITHOUT SUBARU SELECT MONITOR
1 PERFORM READ DIAGNOSTIC TROUBLE
CODE (DTC).
1) Warm-up the engine.
2) Turn ignition switch to OFF.
3) Turn ignition switch to ON.
4) Start the engine.
5) Drive vehicle at speeds greater than 20 km/
h (12 MPH).
6) Stop vehicle.
7) Brake pedal depressed and move select
lever to 1 range.
8) Turn ignition switch to OFF.
9) Turn ignition switch to ON.
10)Move select lever 2 range.
11)Move select lever 1 range.
12)Move select lever 2 range.
13)Move select lever 3 range.
14)Move select lever D range.
Does indicator light blinks at 4-Hz inter-
vals?
NOTE:
Blinks every 0.125 (1/8) seconds (until ignition
switch is turned OFF).
2 CHECK INDICATOR LIGHT.
Does indicator light blinks at 2-Hz intervals?
NOTE:
Blinks every 0.25 (1/4) seconds (until ignition
switch is turned OFF).
3 CHECK INDICATOR LIGHT.
Is DTC indicated?
4 CHECK INDICATOR LIGHT.
Does indicator light remains illuminated?
READ DIAGNOSTIC TROUBLE CODE (DTC)
Step Value
Indicator light blinks at every 4-
Hz interval.
Indicator light blinks at every 2-
Hz interval.
DTC is displayed.
Indicator light remains illumi-
nated.
AT-24
Yes
Go to step 2. Repair power sup-
ply and ground cir-
cuit.<Ref. to AT-
34, CHECK
POWER SUPPLY
AND GROUND
LINE, Diagnostic
Procedure for
POWER Indicator
Light.>
AT system is nor- Go to step 3.
mal.
Inspect problem Go to step 4.
corresponding with
DTC.
NOTE:
Record all DTCs.
Repair power indi- Calling up trouble
cator light circuit code again.
<Ref. to AT-30,
Diagnostic Proce-
dure for POWER
Indicator Light.> ,
or Inspect inhibitor
switch, wiring,
TCM, etc.
No