P0573

DTC P0573

CIRCUIT DESCRIPTION
The BCM receives a signal from the brake pedal position sensor through the stop lamp switch signal circuit. The BCM then applies voltage through the stop lamp voltage supply circuit to the PCM, EBCM and the stop lamps.

CONDITIONS FOR RUNNING THE DTC
- Vehicle has cycled from 0-60 km/h (0-37 mph) 3 times in 1 ignition cycle.
- Continuous once the previous criteria have been met

CONDITIONS FOR SETTING THE DTC
The PCM detects an open or short to ground on the stop lamp voltage supply circuit when the voltage should be present.

ACTION TAKEN WHEN THE DTC SETS
- The PCM stores the DTC information into memory when the diagnostic runs and fails.
- The malfunction indicator lamp (MIL) will not illuminate.
- The PCM records the operating conditions at the time the diagnostic fails The PCM stores this information in the Failure Records.

CONDITIONS FOR CLEARING THE DTC
- A last test failed, or current DTC, clears when the diagnostic runs and does not fail.
- A history DTC will clear after 40 consecutive warm-up cycles, if no failures are reported by this or any other non-emission related diagnostic.
- Use a scan tool in order to clear the DTC.

DIAGNOSTIC AIDS

IMPORTANT:
- Verify that the brake pedal position sensor switch is adjusted properly. Refer to Brake Pedal Position Sensor Calibration Description and Operation.
- Test drive the vehicle if a switch or circuit condition cannot be located An intermittent condition may be duplicated during a test drive.
- For an intermittent, refer to Diagnostic Aids for Circuit Testing and Wiring Repair procedures.

TEST DESCRIPTION

Steps 1 - 5:

The number below refers to the step number on the diagnostic table
2. This step determines if the fault is present