Overdrive Switch: Testing and Inspection

O/D OFF SWITCH INSPECTION
Inspection of Operation
1. Turn the ignition switch from OFF to ON.
2. Verify that the O/D OFF indicator light is not illuminated. Depress the O/D OFF switch and verify that the O/D OFF indicator light illuminates.
- If not as specified, inspect the terminal voltage of the O/D OFF switch.

Inspection of Voltage
1. Remove the rear console.
2. Turn the ignition switch to the ON position.








3. Measure the voltage at the O/D OFF switch connector.
- If not as specified, inspect for continuity at the O/D OFF switch.
4. Install the rear console.

Inspection of Continuity
1. Disconnect the negative battery cable.
2. Remove the rear console.
3. Disconnect the O/D OFF switch connector.








4. Inspect for continuity at the O/D OFF switch.
- If not as specified, replace the selector level knob component.
- If the switch is okay, inspect the wiring harness. (O/D OFF switch-transmission control module, O/D OFF switch-Body ground.)
5. Install the rear console.
6. Connect the negative battery cable.