Normal Operation
WARNING: This page is about a different car, the 2009 Mercury Grand Marquis and 2009 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.
The PCM sends a signal through circuit 151 (LB/BK) to the speed control switch, which passes through the clockspring. The return signal is sent through circuit 848 (DG/OG).
This pinpoint test is intended to diagnose the following:
- PCM not configured for speed control
- Speed control switches
- Digital transmission range (TR) sensor
- PCM