Cruise Control Inhibited

WARNING: This page is about a different car, the 2003 Pontiac Aztek and 2003 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.

The PCM determines when the vehicle operating conditions are not appropriate for cruise control operation. The PCM inhibits the cruise control operation when any of the following conditions occur:

The vehicle speed is less than 40 km/h (25 mph).
The vehicle is in PARK, REVERSE, NEUTRAL, or 1st gear.
The engine RPM is low.
The engine RPM is high with fuel cut-off.
The vehicle speed is too high.
The battery is either overcharged or undercharged.
The anti-lock brake system/traction control system is active for more than 2 seconds

When any of the conditions listed above are present, the PCM removes the ground from the cruise control inhibit signal circuit. The cruise control module monitors the cruise control inhibit circuit in order to disable the system. The PCM compares the status of the cruise control inhibit signal circuit to the status of the cruise control engaged signal circuit. If the cruise control engaged signal circuit indicates that the cruise control module has cruise control engaged while the PCM is inhibiting cruise control operation, the PCM sets a DTC. The PCM also sends a class 2 message indicating that the cruise control is engaged to the IPC indicator, (if equipped).

Another feature, internal to the cruise control module is the lash learn feature. The cruise control module has the ability to learn and electronically compensate for up to 4mm of lash in the non-adjustable cruise control cable. The cruise control module maintains this adjustment and updates this information every 30 seconds.