P1575
DTC P1575
Circuit Description
The electronic brake control module (EBCM) uses the brake pedal position sensor (BPP) Sensor to determine if an extended brake travel event has occurred. If an extended brake travel condition exists, the EBCM will provide a 5-volt output via the extended brake travel circuit to the engine control module (ECM).
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC P1575 Extended Travel Brake Switch Circuit
Conditions for Running the DTC
* The ignition is ON.
* Ignition voltage is greater than 8 volts.
Conditions for Setting the DTC
One of the following conditions exist:
* The extended brake travel voltage is less than 0.8 volts when extended brake travel is ON.
* The extended brake travel voltage is greater than 2.0 volts when extended brake travel is OFF.
Action Taken When the DTC Sets
All systems remain functional.
Conditions for Clearing the DTC
* The condition for the DTC is no longer present and the DTC is cleared with a scan tool.
* The electronic brake control module (EBCM) automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.
Diagnostic Aids
One of the following may cause this concern:
* An open in the extended brake travel circuit.
* A short to ground or voltage in the extended brake travel circuit.
Test Description
The numbers below refer to the step numbers on the diagnostic table.
3. Measure the extended brake travel circuit in order to determine if the extended brake travel signal has a valid voltage.
4. Measure the extended brake travel signal in order to determine if the EBCM is functioning properly.
8. This vehicle is equipped with a ECM which uses an electrically erasable programmable read only memory (EEPROM). When replacing the ECM, the replacement ECM must be programmed.
