Code 93 - Code 91 Or 92 Set In Current Or Last Ignition Cycle: Notes

When Code 91 or 92 is set, Code 93 becomes a current failure during next ignition cycle, keeping ABS disabled until a brake switch on signal is sensed by EBCM/EBTCM. Code 93 alone indicates Codes 91 or 92 failed previously but is intermittent or has been corrected.

NOTE: Test numbers refer to numbers on diagnostic chart. Use only 10-megohm (minimum) DVOM for all voltage and resistance tests. For identification of circuits and terminals referenced in charts and text, see WIRING DIAGRAM .

Fig 1: Code 93 Diagnostic Flow Chart

Courtesy of GENERAL MOTORS CORP.

Indicates which Code (91 or 92) caused Code 93 to set.