Test Description

The following numbers refer to circled numbers in diagnostic chart.

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

Fig 1: Code 71: ECBM Location

Courtesy of GENERAL MOTORS CORP.

Fig 2: Code 71: EBCM Control Module Diagnostic Chart

Courtesy of GENERAL MOTORS CORP.