Body Control Module (BCM)

Battery 1: The scan tool displays 0.0-25.5 V. This parameter is the system voltage measured by the BCM at the BCM battery input.

Shifter Unlock Fdbk: The scan tool displays High/Low. This parameter indicates Low when the mechanical lock is engaged preventing an inadvertent shift out of the PARK position. The Display indicates High when BCM opens the controlled ground circuit of the shift lock control solenoid.

Engine Control Module (ECM) / Powertrain Control Module (PCM)

Brake Switch: The scan tool displays Applied/Released. The scan tool displays the status of the brake switch.

Ignition 1: The scan tool displays 0-20 V. The scan tool displays the voltage as received on the Ignition 1 circuit to the ECM/PCM.

Transmission Range: The scan tool displays Reverse, 2nd, Drive, Park, Neutral, 1st and 3rd. The scan tool display the switch status of the transmission (L61).

TR Sw.: The scan tool displays Invalid, Park, Reverse, Neutral, Drive, Intermediate and Low. The scan tool display the switch status of the transmission (L66).