Diagnostic Test
WARNING: This page is about a different variant/trim than selected.
- CHECK FOR ABS RELATED DTCS PRESENT NOTE:
When this code sets the pedal position in the PCM software will ramp to idle. If the Pedal voltage changes OR the brake pedal is released, the pedal position in the PCM software will ramp up to the pedal position and the ETC light will go out.
NOTE:The most likely cause of this DTC is caused by the customer driving with one foot on the Accelerator pedal and the other resting on the Brake Pedal or a Brake Pedal Position Sensor stuck in the pressed state. Ask the driver of the vehicle if these conditions apply to their driving habits before continuing.
- With the scan tool, read ABS Module DTCs.
Are the any DTCs present in the ABS Module?
Yes
- Perform the appropriate diagnostic test in the ABS Module.
- Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
No
- Go To 2
- With the scan tool, read ABS Module DTCs.
- APP SENSOR SWEEP
- Turn the ignition ON.
- With the scan tool, monitor both APP Sensor voltage readings.
- Slowly press the accelerator pedal from idle until it reaches the end stop near the floor.
- APP Sensor 1 voltage should start at approximately 0.45 volts and increase to approximately 4.6 volts with a smooth transition.
- APP Sensor 2 voltage should start at approximately 0.22 volts and increase to approximately 2.31 volts with a smooth transition.
Does the voltage for the appropriate sensor follow the list specification?
Yes
- Go To 3
No
- Check the Signal and Return circuits for opens and shorts. If OK, Replace the APP Sensor Assembly in accordance with the Service Information. Refer to PEDAL, ACCELERATOR, REMOVAL . After installation is complete, with a scan tool select the ETC RELEARN function to relearn the APPS values.
- Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
- PERFORM THE BRAKE PEDAL CALIBRATION ROUTINE
- With the scan tool, navigate to ABS Module, Misc. Functions, and perform the Brake Pedal Calibration Routine.
Was the Brake Pedal Calibration Routine successful?
Yes
- Test drive the vehicle and verify that the Brake Pedal Calibration fixed the problem.
- Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
No
- Visually inspect the BPP Sensor for Improper installation, damage or mechanical failure. If OK, replace the Brake Pedal Position Sensor.
- Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
- With the scan tool, navigate to ABS Module, Misc. Functions, and perform the Brake Pedal Calibration Routine.