This guide provides a straightforward walkthrough for performing an A/C Relay Actuator Test on a 2020 Sany C8 using the Launch X431 PAD5 Elite. This diagnostic procedure is essential for verifying relay functionality and troubleshooting climate control issues in heavy-duty machinery.
Prerequisites for Testing
Before starting the test, ensure the following conditions are met to avoid execution failure:
- Ignition Status: T15 must be powered on.
- Engine State: Engine speed must be 0 RPM.
- Vehicle Movement: Vehicle speed must be 0 km/h.
- Duration: The test will automatically stop after 30 seconds.
Step-by-Step Operation Guide
Step 1: Vehicle Selection
- Navigate to Local Diagnose >> Construction >> Sany
- Tap OK to enter the diagnostic menu.
Step 2: System Identification
- Go to Engine System >> Weichai Engine >> Automatic recognition >> Weichai engine automatic recognition >> WISEC10-P201-V174
- Click OK to confirm vehicle information.
Step 3: Actuator Test Execution
- Enter the Actuator test >> A/C relay actuator test
- To Open: Click Open. The screen will display “Execution successful” once the relay activates.
- To Close: Click Close. The screen will confirm “Execution successful”.
Video Guide:
Conclusion
Once the relay has been toggled and verified, the X431 PAD 5 operation is complete. This quick test allows technicians to instantly determine if the A/C issue lies within the electronic control side or the mechanical components of the compressor.