Possible Sources
- Diagnostic Trouble Codes (DTCs) present in ABS module
- Wiring, terminals or connectors
- Vacuum leak
- Battery undervoltage (less than 9 volts)
- Battery overvoltage (greater than 16.9 volts)
- Brake pedal application
- Brake booster vacuum sensor
- Vacuum pump
- Brake pedal angle sensor
- Brake booster travel sensor