Subaru IMPREZA 2002 Service Manual page 213

I
DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
8
CHECK "N" RANGE INDICATOR LIGHT
BULB.
1)Turn the ignition switch to OFF.
2)Remove the combination meter.
3)Remove the "N" range indicator light bulb
from combination meter.
9 CHECK HARNESS CONNECTOR BETWEEN
TCM AND COMBINATION METER.
1)Disconnect the connectors from TCM and
combination meter.
2)Measure the resistance of harness between
TCM and combination meter.
Connector & terminal
Non-turbo model
Turbo model
(B55) NO. 22
-
(i12) NO. 12:
(B55) NO. 14
-
(i12) NO. 12:
0 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
(B55) No. 22
-
Chassis ground:
(B55) No. 14
-
Chassis ground:
,1 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
(B55) NO. 8
-
(T7) NO. 3 :
(B55) NO. 4
-
(T7) NO. 3 :
1 2
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
(B55) No. 8 (+)
-
Chassis ground (-):
(B55) No. 4 (+)
-
Chassis ground ( - ) :
Check
s the "N" range indicator light
wlb OK?
s the resistance less than
1
2?
s
the resistance more than 1
dQ?
s the resistance less than
1
n?
Is the voltage less than 1 V in
' D range?
Yes
i o
to step 39.
i o to step 65.
30 to step 41.
i o to step 42.
30 to step 43.
No
Replace the "N"
range indicator
light bulb. <Ref. to
IDI-11, Combina-
tion Meter Assem-
bly.>
Repair open circuit
in harness
between TCM con-
nector and combi-
nation meter, and
poor contact in
TCM connector.
Repair ground
short circuit in "N"
range circuit.
Repair open circuit
in harness
between TCM and
inhibitor switch
connector, and
poor contact in
coupling connec-
tor.
Go to step 65.
AT-I 21