Subaru Impreza 2003 Service Manual page 1795

DIAGNOSTIC PROCEDURE WITHOUT DIAGNOSTIC TROUBLE CODE (DTC)
Step
1 CHECK VEHICLE.
2 CHECK SPORT SHIFT SWITCH.
3 CHECK SPORT SHIFT SWITCH.
4 CHECK SPORT SHIFT SWITCH.
5 CHECK SPORT SHIFT SWITCH GROUND
LINE.
1)Turn the ignition switch to OFF.
2)Disconnect the connector from SPORT shift
switch.
3)Measure the resistance of harness between
SPORT shift switch connector and chassis
ground.
Connector & terminal
(B237) No. 4 —- Chassis ground:
6 CHECK SPORT SHIFT SWITCH.
Measure the resistance between SPORT shift
switch terminals.
Terminals
No. 4 —- No. 5:
7 CHECK SPORT SHIFT SWITCH.
1)Move the select lever to SPORT shift mode.
2)Measure the resistance between SPORT
shift switch terminals.
Terminals
No. 4 — No. 5:
8 CHECK HARNESS CONNECTOR BETWEEN
TCM AND SPORT SHIFT SWITCH.
1)Disconnect the connector from TCM.
2)Measure the resistance of harness between
TCM connector and SPORT shift switch con-
nector.
Connector & terminal
(B237) No. 5 — (B55) No. 15:
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Check
Is the target model equipped
with SPORT shift?
Does the LED light up when
select lever is moved to
SPORT shift mode?
Does the LED light up when
select lever is moved to shift
up side?
Does the LED light up when
select lever is moved to shift
down side?
Is the resistance less than 1
Ω?
Is the resistance more than 1
MΩ?
Is the resistance less than 1
Ω?
Is the resistance less than 1
Ω?
4AT-125
Yes
Go to step 2. Go to step SYMP-
TOM RELATED
DIAGNOSTIC.
<Ref. to 4AT-133,
Symptom Related
Diagnostic.>
Go to step 3. Go to step 5.
Go to step 4. Go to step 12.
Go to "Inspection Go to step 19.
of SPORT shift
indicator" proce-
dures. <Ref. to
4AT-129, CHECK
SPORT SHIFT
INDICATOR,
Diagnostic Proce-
dure without Diag-
nostic Trouble
Code (DTC).>
Go to step 6. Repair the open
circuit in harness
between SPORT
shift switch and
chassis ground.
Go to step 7. Replace the lever
plate assembly.
Go to step 8. Replace the lever
plate assembly.
Go to step 9. Repair the open
circuit in harness
between SPORT
shift switch con-
nector and TCM
connector and
poor contact in
coupling connec-
tor.
No