Subaru IMPREZA 2002 Service Manual page 125

1
DIAGNOSTIC PROCEDURE FOR AT OIL TEMP WARNING LIGHT
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
~~~ ~
Step
CHECK AT OIL TEMP WARNING LIGHT.
Turn the ignition switch to ON (engine OFF).
CHECK AT OIL TEMP WARNING LIGHT.
1)Turn the ignition switch to OFF.
2)Remove the combination meter.
3)Remove the ATF temp warning light bulb
from combination meter.
CHECK AT OIL TEMP WARNING LIGHT.
Perform "Read Diagnostic Trouble Code".
<Ref. to AT-24, WITHOUT SUBARU SELECT
MONITOR, OPERATION, Read Diagnostic
Trouble Code (DTC).>
CHECK FUSE (No. 13).
Remove the fuse (No. 13).
CHECK HARNESS CONNECTOR BETWEEN
COMBINATION METER AND IGNITION
SWITCH.
1)Turn the ignition switch to ON (engine OFF).
2)Measure the voltage between combination
meter connector and chassis ground.
Connector & terminal
(il0) No. 7 (+)
-
Chassis ground (-):
CHECK COMBINATION METER.
Measure the voltage between combination
meter connector and chassis ground.
Connector & terminal
( i l l ) No. 5 (+)
-
Chassis ground (-):
CHECK OPEN CIRCUIT OF HARNESS.
1)Turn the ignition switch to OFF.
2)Disconnect the connector from combination
meter connector.
3)Measure the resistance of harness between
combination meter.
Connector & terminal
Non-turbo model
Turbo model
(854) NO. 3
-
( i l l ) NO. 5:
(856) NO. 11
-
( i l l ) NO. 5:
Check
)oes the AT OIL TEMP warn-
i g light illuminate?
;the AT OIL TEMP warning
ght bulb OK?
)oes the AT OIL TEMP warn-
i g light blink?
5
the fuse (No. 13) blown out?
5
the voltage more than 9 V?
3
the voltage less than 1 V?
s the resistance less than 1
l?
Yes
Go to step
3.
Go to step
4.
A temporary poor
contact of the con-
nector or harness
may be the cause.
Repair the har-
ness or connector
in TCM, inhibitor
switch and combi-
nation meter.
Replace the fuse
(No. 13). If the
replaced fuse (No.
13) is blown out
easily, repair short
circuit in harness
between fuse (No.
13) and combina-
tion meter.
Go to step 6.
Go to step 7 .
Go to step 8.
No
30 to step 2.
3eplace the A T
31L TEMP warn-
ng light bulb.
30 to step 10.
30 to step 5.
3epair open or
short circuit in har-
less between
:ombination meter
md battery.
3epair the combi-
iation meter.
:Ref. to IDI-11,
zombination
Meter Assembly.>
3epair open circuit
n harness
ietween TCM and
:ombination
neter, and poor
:ontact in cou-
iling connector.
AT-33