Circuit Description

The IPC and the body control module (BCM) communicate via a serial peripheral interface (SPI). The IPC receives information from the BCM on the SPI serial data out circuit. The BCM transmits information to the IPC in order to control various indicators, the engine coolant temperature gage, and the fuel gage. The BCM receives data from the IPC on the SPI serial data in circuit. The IPC transmits information such as tachometer active status, speedometer active status, and invalid data received messages. The BCM synchronizes the data signals by toggling the SPI serial data clock circuit to ground.