Subaru IMPREZA GD 2007 Series Manual page 2662

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Step
1 CHECK ATF TEMPERATURE WARNING
LIGHT.
Turn the ignition switch to ON (engine OFF).
2 CHECK FUSE (NO. 13).
Remove the fuse (No. 13).
3 ATF TEMPERATURE WARNING LIGHT IN-
SPECTION.
1) Turn the ignition switch to OFF.
2) Remove the combination meter.
4 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 and chassis ground.
Connector & terminal
(i11) No. 7 (+) — Chassis ground (–):
5 CHECK COMBINATION METER.
Measure the voltage between combination
meter connector and chassis ground.
Connector & terminal
(i10) No. 5 (+) — Chassis ground (–):
6 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 meters.
Connector & terminal
(B54) No. 15 — (i10) No. 5:
7 CHECK INPUT SIGNAL FOR TCM.
1) Connect the connectors to TCM and combi-
nation meter.
2) Turn the ignition switch to ON (engine OFF).
3) Measure the voltage between TCM connec-
tor and chassis ground.
Connector & terminal
(B54) No. 15 (+) — Chassis ground (–):
8 CHECK ATF TEMPERATURE WARNING
LIGHT.
AT Oil Temp Warning Light Display
Does the ATF temperature
warning light illuminate?
Is the fuse (No. 13) blown out? Replace the fuse
Is the ATF temperature warning
light OK?
Is the voltage 9 V or more?
Is the voltage less than 1 V?
Is the resistance less than 1 Ω? Go to step 7.
Is the voltage less than 1 V?
Does the ATF temperature
warning light illuminate?
4AT(D)(diag)-23
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Check Yes
Go to step 2.
(No. 13). If the
replaced fuse (No.
13) is blown out
easily, repair the
short circuit of the
harness between
fuse (No. 13) and
the combination
meter.
Go to step 4.
Go to step 5.
Repair the combi-
nation meter. <Ref.
to IDI-11, Combi-
nation Meter.>
Go to step 8.
Proceed with the
diagnosis corre-
sponding to the
Basic Diagnostic
Procedure.
No
Go to step 3.
Go to step 4.
Check the combi-
nation meter.
Repair the open
circuit of harness
between the com-
bination meter and
battery.
Go to step 6.
Repair the open
circuit of harness
between TCM and
combination meter,
and the poor con-
tact of the connec-
tor.
Repair the poor
contact.
Check the power
supply and ground
circuit.