* THINKHAO ECCS06 Hand-Held "Electronic Control Compressor System Scanner," Specially Designed for Automotive Testing/ Scanning Electronically Controlled VDC (Variable Displacement Compressor) System. * VDC-Variable Displacement Compressor. ECV-Electronic Control Valve (Solenoid). ECU-Main Vehicle Electronic Control Unit. * An Innovation Auto AC Compressor ECV Testing Process and Scanning of the PWM Signal from the ECU (Computer). * An Aftermarket "Electrical Control Compressor System Scanner" to monitor the PWM duty cycle signal sent from ECU to the compressor control valve. * A complete scan VDC-variable displacement compressor operation analysis testing the computer-controlling Compressor. * Manually control VDC using ECCS06. * The ECCS06 "Electrical Control System Compressor System Scanner" is connected to the Compressor's control valve and ECU with specific adapters in "Series." * Come with OEM- Specific Pigtail Connectors and Adapters directly hooked up to most Compressors manufactures. * Easy 1-2-3, Quick Connection Tester. 1st Step: Check the Resistance of the ECV Control Valve Solenoid; the normal resistance range of ECV is 10-14Ω 2nd Step: Analyze input PWM signal from ECU to ECV in "Series." Accurately diagnose & avoid misdiagnosis, the VDC System. Contents: ● One Hand-Held Scanner with Wire Harness. ● One Interface Adapter. ● One set of Primary Pigtail Kit. (15 Female Connectors and 15 Male Connectors). ● Option Secondary Pigtail Kit. (10 Female Connectors and 10 Male Connectors).(Available for extra purchasing): ● One Plastic Protection case. ● One Instruction Booklet.