Circuit Description

TRA circuit sends TRAC control information from ABS ECU to Engine Control Module (ECM). EFI+ and EFI- circuits send engine control information from ECM to ABS ECU. DTC is set when ECM receives a trouble signal in TRA circuit or no EFI circuit data is received from ECM when engine speed is 500 RPM or greater and vehicle speed is 37 MPH or greater. Possible causes are:

• TRA open or short circuit.
• EFI+ open or short circuit.
• EFI- open or short circuit.
• ECM.
• ABS ECU.