DTC 92

Code 92: Open Brake Switch When ABS Was Required.:

DTC 92 Open Brake Switch When ABS Was Required:

Circuit Description:
This DTC is run to determine the proper operation of the brake switch. This is important because ABS is activated when the brake switch is "ON." If the brake switch is "OFF," ABS will never be activated. Since this malfunction is difficult to detect under normal braking conditions, this malfunction is only detected when ABS is required.

DTC Will Set When:
DTC 92 can be set if the vehicle's speed is greater than 8 km/h (5 mph). If the brake was not "ON" and a release was required on two channels for 0.5 seconds, a malfunction exists.

Action Taken:
A malfunction DTC is stored, ABS is disabled. The amber ABS warning lamp is turned "ON."

DTC Chart Test Description:
Number(s) below refer to circled number(s) on the diagnostic chart.
1. Indicates if the brake switch signal is being received by the EBCM.
2. Indicates if an open circuit exists in the brake switch or brake lamp circuitry.
3. Isolates the open circuit to either the brake switch input circuitry or the EBCM.
4. Ensures malfunction was not due to poor terminal contact.
5. Verifies the voltage is available at the brake switch.
6. Verifies that the brake switch is functioning properly.

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.

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.