Subaru Impreza 2004 Service Manual page 159

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
Step
8 CHECK ATF TEMPERATURE SENSOR CIR-
CUIT.
Check the ATF temperature sensor circuit.
<Ref. to 4AT(diag)-44, DTC 27 ATF TEMPER-
ATURE SENSOR, Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>
9 CHECK POOR CONTACT.
Check poor contact in TCM connector.
10 CHECK MECHANICAL TROUBLE.
Check mechanical trouble in automatic trans-
mission.
Check
Is there any trouble in ATF tem-
perature sensor circuit?
Is there poor contact in TCM
connector?
Is there any mechanical trouble
in automatic transmission?
EN(H4DOTC)(diag)-238
Yes
Repair or replace Go to step 9.
the ATF tempera-
ture sensor circuit.
Repair the poor Go to step 10.
contact in TCM
connector.
Repair or replace Replace the TCM.
the automatic <Ref. to 4AT-74,
transmission. Transmission Con-
<Ref. to 4AT-34, trol Module
INSPECTION, (TCM).>
Road Test.>
No