Compressor Bypass Valve(S)
The compressor bypass valve(s) is used to prevent backflow though the turbocharger compressors when the throttle is rapidly closed to avoid an undesirable audible noise. The high pressure downstream of the compressor bypasses the compressor as it travels upstream when the valve is open. In this application, two compressor bypass valves are used to establish a sufficient bypass flow rate. The compressor bypass valve(s) are checked for electrical faults.
COMPRESSOR BYPASS VALVE CIRCUIT CHECK OPERATION
| DTCs | P0034 Turbocharger/Supercharger Bypass Valve "A" Control Circuit Low P0035 Turbocharger/Supercharger Bypass Valve "A" Control Circuit High P00C1 Turbocharger/Supercharger Bypass Valve "B" Control Circuit Low P00C2 Turbocharger/Supercharger Bypass Valve "B" Control Circuit High |
| Monitor Execution | Continuous |
| Monitor Sequence | None |
| Monitoring Duration | 5 seconds |
COMPRESSOR BYPASS VALVE CIRCUIT MALFUNCTION THRESHOLDS
| PCM smart driver hardware detects faults for circuit short to battery, short to ground, and open circuit. Fault status reported to PCM to set appropriate DTC. |