Optima & Magentis (Canadian) (2.7L)
- Turn ignition off. Disconnect TP sensor 3-pin harness connector. Measure resistance at component side between connector terminals No. 2 and 3. See Figure. With throttle fully closed, resistance should be 1.6-2.4 k/ohms. If resistances are as specified, go to next step. If resistances are not as specified, Adjust or replace TP sensor as necessary.
- Connect TP sensor connector. Turn ignition on. Backprobe and measure voltage between TP sensor connector terminals No. 1 (Blue wire) and No. 2 (Black wire). See Figure. With throttle fully closed voltage should be .2-.8 volts. With throttle wide open, voltage should be 4.0-4.4 volts. If voltages are not as specified, Adjust or replace TP sensor as necessary.