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 overdrive. 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



(*) O/D Main Switch
- Contacts go OFF with button pushed IN.
- Contacts go ON with button pushed OUT.

INSPECTION PROCEDURE
If "O/D OFF" indicator light does not light up:

















If "O/D OFF" indicator light remains on:









If "O/D OFF" indicator light blinks:
System OK. Do diagnostic trouble code check.