Control Unit (RAM), Control Unit (ROM)

DTC Control Unit (RAM), Control Unit (ROM)







DESCRIPTION
The TCM consists of a microcomputer and connectors for signal input and output and for power supply. The unit controls the A/T.

On Board Diagnosis Logic:

Diagnostic Trouble Code (DTC) Confirmation Procedure

NOTE: If "DTC Confirmation Procedure" has been previously conducted, always turn ignition switch OFF and wait at least 5 seconds before conducting the next test.










With CONSULT-II
1. Turn ignition switch ON and select "DATA MONITOR" mode for A/T with CONSULT-II.
2. Start engine.
3. Run engine for at least 2 seconds at idle speed.


DIAGNOSTIC PROCEDURE
1. INSPECTION START

With CONSULT-II
1. Turn ignition switch ON and select "SELF DIAG RESULTS" mode for A/T with CONSULT-II.
2. Touch "ERASE".
3. Perform "Diagnostic Trouble Code (DTC) Confirmation Procedure"
4. Is the "CONTROL UNIT (RAM)" or "CONTROL UNIT (ROM)" displayed again?

Yes or No?

Yes >> Replace TCM.

No >> INSPECTION END.