Grand AM L4-144 2.4L DOHC VIN T SFI (1997)
Two-way serial communication is sent back and forth between the EBCM and the IPC. A message from the IPC is sent to the EBCM within seven
seconds after ABS initialization. A serial communication failure does not allow the proper lamp commands to be sent back to the IPC.
DIAGNOSTIC AIDS
The scan tool Serial Data Link (SDL) monitor used in this diagnostic is within the body portion of the scan tool. This requires exiting from the
chassis portion of the scan tool to the main menu and entering into the body portion of the scan tool menu and selecting SDL MONITOR. With the
SDL monitor (ABS to IPC mode), any message that is being transmitted on the serial data link can be observed.
The frequency of the malfunction can be checked by using the ENHANCED DIAGNOSTIC function of the scan tool. See: Brakes and Traction
Control/Antilock Brakes / Traction Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/Enhanced Diagnostics
Any circuitry that is suspected of causing the intermittent complaint should be thoroughly checked for backed-out terminals, improper mating,
broken locks, improperly formed or damaged terminals, poor terminal to wiring connections or physical damage to the wiring harness. See: Brakes
and Traction Control/Antilock Brakes / Traction Control Systems/Testing and Inspection/Initial Inspection and Diagnostic Overview/Non-Trouble
Code Procedures
