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 CONTROL UNIT (RAM), CONTROL UNIT (ROM) with CONSULT-II is detected when TCM memory (RAM) or (ROM).

Possible Cause
Check TCM.

Diagnostic Trouble Code (DTC) Confirmation Procedure
If "DTC Confirmation Procedure" has been previously conducted, always turn ignition switch OFF and wait at least 10 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 DIAGNOSIS" 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