This tech tip is for reference only. 5811550 has been discontued.
Pressure Transducer Tester: 5811550
A transducer is a sensor that produces a variable 0-5 volt reference signal based on pressure. It indicates to the ECU (Electric Control Unit) the pressures at which the system is running by converting the pressures it senses into electrical voltage. This signals the ECU to either engage or disengage the fan clutch, compressor, or the vehicle cooling fans.
A pressure transducer tester allows you to measure the pressure as voltage emitted from the transducer to detect if it is failing to meet the specific measuring range set by the manufacturer. The pressure transducer tester allows you to manually operate the pressure transducer while on the vehicle. It can detect faulty transducers and make sure that it is working in set parameters.