O/D Main Switch & O/D OFF Indicator Light Circuit
O/D Main Switch & O/D OFF Indicator Light CircuitCIRCUIT DESCRIPTION
The O/D main switch contacts go off when the switch is pushed in and come 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 OBD II scan tool or LEXUS hand-held tester to the DLC3 can display the diagnostic trouble code.
NOTE: O/D Main Switch
Contacts go off with switch pushed in.
Contacts go on with switch pushed out.
WIRING DIAGRAM
INSPECTION PROCEDURE
O/D OFF indicator light does not light up
O/D OFF indicator light remains ON
O/D OFF indicator light blinks
Perform diagnostic trouble code check.