Subaru LEGACY 2006 Manual page 3473

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
7 CHECK ECM POWER SUPPLY AND
GROUND LINE.
Check ECM power supply circuit and ground
circuit. <Ref. to EN(H4SO)(diag)-60, CHECK
POWER SUPPLY AND GROUND LINE OF
ENGINE CONTROL MODULE (ECM), Diag-
nostics for Engine Starting Failure.> <Ref. to
EN(H4SO U5)(diag)-63, CHECK POWER
SUPPLY AND GROUND LINE OF ENGINE
CONTROL MODULE (ECM), Diagnostics for
Engine Starting Failure.> <Ref. to
EN(H4DOTC)(diag)-59, CHECK POWER SUP-
PLY AND GROUND LINE OF ENGINE CON-
TROL MODULE (ECM), Diagnostics for Engine
Starting Failure.> <Ref. to EN(H6DO)(diag)-61,
CHECK POWER SUPPLY AND GROUND
LINE OF ENGINE CONTROL MODULE
(ECM), Diagnostics for Engine Starting Fail-
ure.>
AA:DTC P1718 CAN COMMUNICATION CIRCUIT
NOTE:
Refer to "Body Integrated Unit" for diagnosis of P1718. <Ref. to LAN(diag)-2, Basic Diagnostic Procedure.>
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Check
Is there any abnormal condi-
tion?
4AT(diag)-87
Yes No
Repair the mal- Replace the TCM.
function of ECM <Ref. to 4AT-62,
power supply cir- Transmission Con-
cuit and ground cir- trol Module
cuit. (TCM).>