Circuit Description

IPC uses an oscillator to send and interpret data between other components on Class 2 serial data line. It sends or receives different bytes of information between IPC and other vehicle components. When vehicle is first turned on, an internal test is performed by IPC to determine if oscillator is operating properly.

DTC will set when IPC is unsuccessful at verifying operation of oscillator or when oscillator is disrupted by outside radio frequency interference. When DTC is set, SERVICE VEHICLE SOON indicator light will come on.

Under all fault conditions, a current DTC requires an ignition cycle to become a history code. If conditions for malfunction no longer exist, history DTC will clear after 100 consecutive ignition cycles. DTC will also clear when scan tool is used to clear codes.