Automatic Transmission Electronic Controlled (ECT) - Diagnostics: Initialization

1. RESET MEMORY 
   NOTE:

   • Perform the RESET MEMORY (AT initialization) when replacing the automatic transaxle assy, engine assy or ECM.
   • The RESET MEMORY can be performed only with the Hand-held tester.

   HINT:

   The ECM memorizes the condition that the ECT controls the automatic transaxle assy and engine assy according to those characteristics. Therefore, when the automatic transaxle assy, engine assy, or ECM has been replaced, it is necessary to reset the memory so that the ECM can memorize the new information.

   Reset procedure is as follows.

   1. Turn the ignition switch off.
   2. Connect the hand-held tester to the DLC3.
   3. Turn the ignition switch on (IG) and push the hand-held tester main switch on.
   4. Select the item "DIAGNOSIS / ENHANCED OBD II".
   5. Perform the reset memory procedure from the ENGINE menu.
   Fig 1: Preparing For Reset Memory During Road Test

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

The ECM is learned by performing the ROAD TEST.