Test Description

Numbers below refer to circled numbers in diagnostic chart.

1. Checks if minimum voltage is available to ECBM.
2. Checks for good connections from harness to ECBM.
3. Checks if fault was false; if not, replace ECBM.

Fig 1: Code 71, Elect Brake Control Module (ECBM) Fault

Courtesy of GENERAL MOTORS CORP.