DTC 93

CIRCUIT DIAGRAM





INSPECTION PROCEDURE

CIRCUIT DESCRIPTION:
This DTC is the second portion of DTCs 91 and 92. If DTCs 91 or 92 failed during the last ignition cycle, DTC 93 becomes a current failure during the next ignition cycle, keeping Antilock Brake System (ABS) disabled until a stop light switch input is seen. When a change is seen during an ignition cycle in which DTC 93 is a current malfunction, DTC 91 or 92 will clear itself and the end of the current ignition cycle and ABS will enable itself at the start of the next ignition cycle. DTC 93 alone indicates DTCs 91 or 92 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 TECH-1 as described in "TECH-1 Diagnostics".
Any circuitry that is suspected as causing the intermittent malfunction 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 stop light switch operation using the data list of the TECH-1. As the brake is applied, the data list should display the brake switch "ON" within 25 mm (1-inch) of travel.