Self Test

The Electronic Brake/Traction Control Module (EBCM/EBTCM) performs an automatic test when the ignition is turned to RUN. This occurs once each ignition cycle. The self test cycles valve solenoids and the pump motor (as well as the necessary relays) to check component operation. If any malfunction is detected, the EBCM/EBTCM will set a Diagnostic Trouble Code (DTC). The self test may be heard and felt while it is taking place, and is a normal mode of operation.

The EBCM/EBTCM contains sophisticated on-board diagnostics that, when accessed with a scan tool, are designed to identify the source of most system malfunctions as specifically as possible. There are 35 diagnostic trouble codes to assist with diagnosis. Using the scan tool, some inputs and outputs can be monitored, thus enabling malfunction confirmation and repair verification. Manual control of components and automated functional tests are also available when using the scan tool.