DTC A093: A091 or A092 Set In Current or Previous Ign. Cycle

CODE A091 OR A092 SET IN CURRENT OR PREVIOUS IGNITION CYCLE





Diagnosis
The system monitors tests A091 and A092 during the last or current ignition cycle and sees no transition of the brake switch from OFF to ON.

Fail Action
This DTC is the second portion of DTCs A091 and A092. If DTCs A091 or A092 failed during the last ignition cycle, DTC A093 becomes a current failure during the next ignition cycle, keeping the ABS disabled and the ABS warning lamp ON until a brake light switch transition is seen from OFF to ON. When a brake ON is seen during an ignition cycle in which DTC A093 is a current malfunction, the system will enable the ABS at the start of the next ignition cycle. If no transition is seen, DTC A093 will remain a current failure during all following ignition cycles until a transition from OFF to ON is seen.

Test Description
The number(s) below refer to step(s) on the diagnostic table.
1. This step indicates which DTC (either A091 or A092) caused DTC A093 to set.
2. This insures that the DTC that set is repaired so that DTC A093 can be cleared.

Diagnostic Aids
An intermittent malfunction may be caused by a poor connection, wire insulation that has been rubbed through, or a wire that is broken inside the insulation.
Check the frequency of the malfunction by using the enhanced diagnostic feature of the scan tool as described in "Scan Tool Diagnostics." Scan Tool Diagnostics
Any circuitry that is suspected of causing the intermittent complaint should be thoroughly checked for backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, poor terminal-to-wiring connections, or physical damage to the wiring harness.
Verify proper brake light switch operation with the Data List of the scan tool. As the brake is applied, the data list should display the brake switch ON within 25 mm (1 inch) of travel.





DTC A093 - Code A091 or A092 Set in Current or Previous Ignition Cycle