AT2–108 A340E (2JZ—GTE) AUTOMATIC TRANSMISSION – TROUBLESHOOTING O D Main Switch & O D OFF Indicator Light Circuit — CIRCUIT DESCRIPTION — The O/D main switch contacts go off when the switch is pushed in and comes on when it is pushed out. In O/D main switch OFF position the O/D OFF indicator lights up, and the ECM prohibits shifting to over- drive. The ECM also causes the O/D OFF indicator light to blink when a malfunction is detected. In this case, connecting the terminals in the DLC2 or DLC1 can display the malfunction code. — WIRING DIAGRAM — 5 1J GAUGE J/B No.1 12 1E O/D OFF Indicator Light Y 1 2 V-G 5 V-G 28 OD2 II1 E10 V-G IF3 3 V-G V-G → To DLC2 2 O/D Main (*) Switch 4 W-B 1E ECM (*) O/D Main Switch Contacts go off with button pushed in. Contacts go on with button pushed out. Q06898