Cruise Indicator

The cruise indicator gives an indication to the vehicle operator when the speed control system is ON, regardless of whether the speed control is engaged. This indicator is controlled by the IPC circuit board based upon IPC programming and electronic messages received by the IPC from the PCM over the CAN data bus.

The cruise indicator is completely controlled by the IPC logic circuit, and that logic will only allow this indicator to operate when the IPC receives a battery current input on the fused ignition switch output (run-start) circuit. Therefore, the indicator will always be OFF when the ignition switch is in any position except ON or START. The indicator only illuminates when it is energized by the IPC logic circuit. The IPC will turn ON the cruise indicator for the following reasons:

• Cruise Indicator Lamp-On Message  - Each time the IPC receives an electronic cruise indicator lamp-ON  message from the PCM indicating the speed control system is ON, the cruise indicator is illuminated. The indicator remains illuminated until the IPC receives a lamp-OFF message from the PCM, or until the ignition switch is turned to the OFF position, whichever occurs first.

The PCM continually monitors the speed control switches to determine the appropriate outputs to the speed control servo. The PCM then sends the proper lamp-ON or lamp-OFF message to the IPC.