Diagnostic Aids

When diagnosing intermittent problems, select MALF HISTORY from "Scan" tester ABS menu. Supplemental data can be used to duplicate problem. Ensure terminals make good connection.

Fig 1: Code 57 Schematic - LF Motor Circuit Grounded

Courtesy of GENERAL MOTORS CORP.

Fig 2: Code 57 Flow Chart - LF Motor Circuit Grounded

Courtesy of GENERAL MOTORS CORP.