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 DIAGNOSTIC TROUBLE CODE 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)

With CONSULT-II
1. Turn ignition switch ON and select SELF DIAGNOSIS mode for A/T with CONSULT-II.
2. Touch ERASE.
>> GO TO 2.

2. CHECK DTC
Perform AT-211, DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION PROCEDURE.
>> GO TO 3.

3. CHECK DTC AGAIN
Is the CONTROL UNIT (RAM) or CONTROL UNIT (ROM) displayed again?
Yes or No
Yes >> Replace TCM.
No >> INSPECTION END