DTC 94

DTC 94 Brake Lamp Switch Circuit Always Active:

CIRCUIT DESCRIPTION
This DTC occurs when internal self checking safety logic has determined that the brake switch is continuously "ON." This is important, because the TCS can not be activated when the brake switch is "ON."

DTC WILL SET WHEN
DTC 94 can be set if the vehicle speed reaches at least 40 km/h (25 mph). If the brake was never "OFF" during two consecutive ignition cycles, a malfunction exists.

ACTION TAKEN
A malfunction DTC is stored, TCS is disabled and the "TRACTION OFF" indicator lamp is turned "ON." ABS remains functional.

DTC CHART TEST DESCRIPTION
Number(s) below refer to circled number(s) on the diagnostic chart.
1. Checks to see if brake lamps are continuously "ON."
2. Isolates the cause of the malfunction to either a faulty or misadjusted brake switch, or a short to voltage in the brake switch circuitry.
3. The J 39700 Pinout Box with the J 39700-25 adapter cable must be connected before this step is performed. This step checks for a resistive short to voltage in the brake switch circuitry.
4. Ensures malfunction was not due to a physical damage of the circuitry.

DIAGNOSTIC AIDS
Possible causes:
^ Brake switch circuit shorted to voltage.
^ Brake switch misadjusted or shorted.

An "intermittent" malfunction is most likely 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.