P1581

Diagnostic Chart:

Wiring Diagram:

The PCM provides approximately 12 volts ignition voltage to control the movement of the cruise module motor. The feedback signal internal to the PCM monitors circuit 1886 and compares low vs high as the QDM driver is turned On and Off. If voltage is too high when QDM driver if Off, DTC P1581 will set.

DTC PARAMETERS
DTC P1581 will set if Circuit 1886 is greater than three volts with QDM driver Off.

IMPORTANT: The cruise move circuit is tested continuously anytime ignition is On.

DIAGNOSTIC AIDS
If an intermittent exists, observe Scan tool parameters while moving connectors and harnesses.