AT1-89 AT340E (2JZ-GE) AUTOMATIC TRANSMISSION – TROUBLESHOOTING INSPECTION PROCEDURE O/D OFF indicator light does not light up. 1 Check operation of O/D main switch. ON OFF ON O/D button O/D OFF Indicator Light O/D Main Switch Point Push in O/D OFF OFF Push out O/D OFF ON BE6653 G04238 AT5623 C 1. Turn ignition switch ON. 2. Check "O/D OFF" indicator light when O/D main switch is pushed in to ON. OK "O/D OFF" indicator light goes off. C 3. Check "O/D OFF" indicator light when O/D main switch is pushed again, to OFF. OK "O/D OFF" indicator light lights up. Hint If the "O/D OFF" indicator light blinks when the O/D main switch is pushed in to ON, a malfunction is occurring in the system. Check the diagnostic trouble code. OK NG Go to step 4 . 2 Check voltage between terminal OD2 of ECM connector and body ground. ON Check Harness A ECM A 28 OD2 BE6653 AT8773 P 1. Connect the Check Harness A to the ECM (See page EG-404). 2. Turn ignition switch ON. C Check voltage between terminal OD2 of the ECM and body ground. OK O/D Main Switch | Voltage OFF | Below 3 V ON | 9 – 14 V NG OK Proceed to next circuit inspection shown on matrix chart (See page AT1-58). 3 Check harness and connecter between O/D off indicator light and ECM (See page IN-30). OK NG Repair or replace harness or connector. Check and replace ECM.