Subaru 2002 IMPREZA Service Manual page 1608

AUTOMATIC TRANSMISSION (DIAGNOSTICS)
7. Read Diagnostic Trouble Code (DTC)
A: OPERATION
1. WITHOUT SUBARU SELECT MONITOR
Step
1 PERFORM READ DIAGNOSTIC TROUBLE
CODE.
1)Warm-up the engine.
2)Turn the ignition switch to OFF.
3)Turn the ignition switch to ON.
4)Start the engine.
5)Drive the vehicle at speeds greater than 20
km/h (12 MPH).
6)Stop the vehicle.
7)The brake pedal depressed and move select
lever to 1 range.
8)Turn the ignition switch to OFF.
9)Turn the ignition switch to ON.
10)Move the select lever 2 range.
11)Move the select lever 1 range.
12)Move the select lever 2 range.
13)Move the select lever 3 range.
14)Move the select lever D range.
2 CHECK INDICATOR LIGHT.
3 CHECK INDICATOR LIGHT.
4 CHECK INDICATOR LIGHT.
READ DIAGNOSTIC TROUBLE CODE (DTC)
Check
Does the indicator light blink at
4 Hz intervals? NOTE: Blinks
every 0.125 (1/8) seconds
(until the ignition switch is
turned OFF).
Does the indicator light blink at
2 Hz intervals? NOTE: Blinks
every 0.25 (1/4) seconds (until
ignition switch is turned to
OFF).
Is the DTC outputted?
Does the indicator light remain
illuminated?
AT-22
Yes
Repair the power Go to step 2.
supply and ground
circuit.<Ref. to AT-
34, CHECK
POWER SUPPLY
AND GROUND
LINE, Diagnostic
Procedure for
POWER Indicator
Light.>
The AT system is Go to step 3.
normal.
Inspect the prob- Go to step 4.
lem correspond-
ing with DTC.
NOTE:
Record all DTCs.
Repair the power Calling up the DTC
indicator light cir- again.
cuit <Ref. to AT-
28, Diagnostic
Procedure for
POWER Indicator
Light.>, or Inspect
inhibitor switch,
wiring, TCM, etc.
No