Engine Control Module (ECM)

The scan tool displays 0 - 20 volts. The scan tool displays the voltage as received on the ignition 1 circuit to the ECM.

The scan tool displays Invalid, Drive 3\Drive 2, Drive 2, Reverse\Neutral, Neutral, Drive 5, Park\Reverse, Park, Drive 3, Drive 4\Drive 3, Reverse, Park\Reverse, Drive 5\Drive 4, and Drive 4. The scan tool displays the position of the transmission IMS switch.