Overdrive Switch: Testing and Inspection

CIRCUIT DESCRIPTION
The O/D main switch contacts go open when the switch is pushed in and go closed when it is pushed once again. In O/D main switch OFF position, the O/D OFF indicator lights up, and the ECM prohibits shifting to O/D.

(*) O/D Main Switch
Contacts go open with switch pushed in.
Contacts go closed with switch pushed once again.

DETECTING CONDITION