Normal Operation

The digital transmission range (TR) sensor is hardwired directly to the powertrain control module (PCM), which provides the instrument cluster with the transmission range data over the standard corporate protocol (SCP) communication network, circuits 4-EG8 (GY/VT) and 5-EG8 (BU/WH). The instrument cluster PRNDL display is controlled by the instrument cluster, indicating the appropriate range as transmitted to the instrument cluster by the digital TR censor and the PCM. The front electronic module (FEM) and rear electronic module (REM) both control and monitor the exterior illumination. When an exterior lamp(s) is inoperative, the FEM or REM notify the instrument cluster over the SCP communication network and the instrument cluster will illuminate the warning center message LAMP OUT.