C1293

DTC C1293:

CIRCUIT DESCRIPTION
This DTC is the second portion of DTC C1291 and DTC C1292. If DTC C1291 or DTC C1292 failed during the last ignition cycle, DTC C1293 becomes a current failure during the next ignition cycle, keeping ABS disabled until a brake switch on state is seen. When a change is seen during an ignition cycle in which DTC C1293 is a current malfunction, DTC C1291 or DTC C1292 will clear itself at the end of the current ignition cycle, and ABS will enable itself at the start of the next ignition cycle. DTC C1293 alone indicates DTC C1291 or DTC C1292 failed previously, but is intermittent, or has been corrected.

DIAGNOSTIC AIDS
An intermittent malfunction may be caused by a poor connection, rubbed through wire insulation, or a wire that is broken inside the insulation. The frequency of the malfunction can be checked by using the enhanced diagnostic function of the scan tool. 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. Also, verify proper brake switch operation using 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 brake pedal travel.