Transfer Box Electronic Control Unit

The BECM communicates with the transfer box ECU via hardwired connections. The BECM receives signal information from the transfer box ECU with regard to the range selected via three status lines. The BECM processes this information and illuminates warning lamps and/or generates messages for the instrument pack message center as applicable.

The messages generated vary between manual and automatic transmission vehicles. See DESCRIPTION & OPERATION in appropriate AUTOMATIC TRANSMISSION or MANUAL TRANSMISSIONS article.