Subaru IMPREZA 2002 Service Manual page 217

I
DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC)
I
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
3 CHECK HARNESS CONNECTOR BETWEEN
TCM AND INHIBITOR SWITCH.
1)Turn the ignition switch to OFF.
2)Disconnect the connectors from TCM, inhibi
tor switch and combination meter.
3)Measure the resistance of harness between
TCM and chassis ground.
Connector & terminal
Non-turbo model
Turbo model
(B54) No. 10
-
Chassis ground:
(B55) No. 6
-
Chassis ground:
3
CHECK HARNESS CONNECTOR BETWEEN
TCM AND INHIBITOR SWITCH.
1)Turn the ignition switch to OFF.
2)Disconnect the connectors from TCM and
inhibitor switch.
3)Measure the resistance of harness between
TCM and inhibitor switch connector.
Connector & terminal
Non-turbo model
Turbo model
(854) NO. 1
- (P)
NO. 6:
(B55) NO. 7 -
(P)
NO. 6:
3
CHECK INPUT SIGNAL FOR TCM.
1)Turn the ignition switch to OFF.
2)Connect the connector to TCM and inhibitor
switch.
3)Turn the ignition switch to ON.
4)Measure the voltage between TCM and
chassis ground.
Connector & terminal
Non-turbo model
Turbo model
(854) No. 1 (+)
-
Chassis ground (-):
(B55) No. 7 (+)
-
Chassis ground (-):
1 CHECK INPUT SIGNAL
FOR
TCM.
Measure the voltage between TCM and chas-
sis ground.
Connector & terminal
Non-turbo model
Turbo model
(854) No. 1 (+)
-
Chassis ground (-):
(B55) No. 7 (+)
-
Chassis ground ( - ) :
2
CHECK "1" RANGE INDICATOR LIGHT
BULB.
1)Turn the ignition switch to OFF.
2)Remove the combination meter.
3)Remove the "1" range indicator light bulb
from combination meter.
Check
s the resistance more than 1
do?
s the resistance less than 1
1?
s the voltage less than 1 V in
1
"
range?
s the voltage more than 8 V in
ither ranges?
s the "1" range indicator light
iulb OK?
Yes
; o to step 59.
; o to step 60.
30
to step 61.
; o to step 65.
20 to step 63.
~ ~~
No
Repair ground
short circuit in " 2
range circuit.
Repair open circuit
in harness
between TCM and
inhibitor switch
connector, and
poor contact in
coupling connec-
tor.
Go to step 65.
Replace the TCM.
<Ref. to AT-45,
Transmission Con-
trol Module
(TCM).>
Replace the "1"
range indicator
light bulb. <Ref. to
IDI-11, Combina-
tion Meter Assem-
bly.>
AT-1 25