--- product_id: 467436559 title: "ECV520i Car Accessories AC Compressor Electronic Compressor Control Valve Testing Tool(Variable Displacement Compressor Tester)" brand: "tektino" price: "359.22 DT" currency: TND in_stock: false reviews_count: 4 url: https://www.desertcart.tn/products/467436559-ecv520i-car-accessories-ac-compressor-electronic-compressor-control-valve-testing store_origin: TN region: Tunisia --- # PWM signal measurement Manual PWM duty cycle control Reverse battery protection ECV520i Car Accessories AC Compressor Electronic Compressor Control Valve Testing Tool(Variable Displacement Compressor Tester) **Brand:** tektino **Price:** 359.22 DT **Availability:** ❌ Out of Stock ## Summary > 🔧 Diagnose like a pro, fix like a boss! ## Quick Answers - **What is this?** ECV520i Car Accessories AC Compressor Electronic Compressor Control Valve Testing Tool(Variable Displacement Compressor Tester) by tektino - **How much does it cost?** 359.22 DT with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/467436559-ecv520i-car-accessories-ac-compressor-electronic-compressor-control-valve-testing) ## Best For - tektino enthusiasts ## Why This Product - Trusted tektino brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Time & Cost Saver:** Reduces repair time and eliminates costly misdiagnoses with reliable, direct testing capabilities. - • **Manual Duty Cycle Control:** Adjust PWM duty cycle from 18%-84% to simulate compressor displacement and verify performance. - • **Precision PWM Diagnostics:** Accurately measures and outputs PWM signals to pinpoint compressor and control system faults. - • **Robust & User-Safe Design:** Includes reverse battery connection protection and comprehensive cable set for hassle-free operation. - • **ECV Solenoid Resistance Check:** Measures solenoid resistance (10-14Ω normal range) to quickly identify component failures. ## Overview The ECV520i is a specialized electronic testing tool designed for variable displacement A/C compressors. It measures PWM signals from the control system, outputs adjustable PWM signals to test compressor response, and checks ECV solenoid resistance to accurately identify faults. With built-in reverse battery protection and a comprehensive cable kit, it streamlines diagnostics, reduces repair costs, and prevents misdiagnosis for automotive professionals. ## Description For A/C with variable displacement compressor, when the compressor work status is found abnormal, it is necessary to accurately diagnose whether the fault is the compressor itself, the ECV solenoid or the electronic control system. ECV520i can test the control PWM signal issued by the electronic control system, and can also bypass the electronic control system to directly drive the compressor ECV valve, as well as it can test the resistance of the ECV solenoid. Eventually the ECV520i can accurately determine the fault is the electronic control system, the compressor or the ECV solenoidSpecifications:Power supply: Battery power, 12VDCPower cable length: 2.5MTest cable length: 2.1MConnectors: specific connector 12 pairs (male and female), universal connectors 3 pairs (male and female).Duty cycle range the tester issues: 18%-84%, PWM signals. The bigger the duty cycle is issued, the larger displacement the compressor achieves.Note: Protection against reverse battery connection. Review: Good tool - Very good tool. Looks exactly like the picture. It comes with the instruction and all the cables. It comes with a big casing Review: On my vehicle a 2012 Mercedes SLK250 this ECV520I tester could not show a reading of the voltage and duty signal going to the compressor control valve from the vehicle. The issue was that the vehicle detects that the compressor control valve is not connected and will not try and power the valve. Support was of no help with this issue. I was able to get the ECV520I to show the values from the vehicle, by making a "Tee" harness which allowed the compressor control valve to be connected along with the ECV520I. The included manual with the tester is out of date, the manual details connectors not found in the kit. Test of the compressor control valve worked as expected. ## Features - Test function: Measure the PWM signal issued from control system, to determine the control system work status - Output function: Issue PWM signals of different duty cycles to check if the compressor works properly, thus to determine the compressor work status. In this function the duty cycle of PWM is changed manually by pressing the buttons - Resistance function: Measure the resistance of ECV solenoid. The normal resistance range of ECV solenoid is 10-14Ω，out of this range can be considered ECV solenoid failure - ECV520i can largely reduce repair time and cost, eliminate misdiagnosis, and avoid the costly repeated repairing. The tester also has electric protection when battery cable is reversely connected by mistake ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B09LVHHDPS | | Best Sellers Rank | #231,221 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #260 in Air Compressors | | Brand | Tektino | | Customer Reviews | 4.0 4.0 out of 5 stars (8) | | Date First Available | 17 August 2022 | | Exterior | plastic | | Item Weight | 2.46 Kilograms | | Item model number | ECV 520i | | Manufacturer | Tektino | | Manufacturer Part Number | Tektino016 | | Model | ECV 520i | | Package Dimensions | 43.51 x 35.28 x 12.19 cm; 2.46 kg | ## Images ![ECV520i Car Accessories AC Compressor Electronic Compressor Control Valve Testing Tool(Variable Displacement Compressor Tester) - Image 1](https://m.media-amazon.com/images/I/51N4Uwpb-iL.jpg) ![ECV520i Car Accessories AC Compressor Electronic Compressor Control Valve Testing Tool(Variable Displacement Compressor Tester) - Image 2](https://m.media-amazon.com/images/I/51zf9OSVE6L.jpg) ![ECV520i Car Accessories AC Compressor Electronic Compressor Control Valve Testing Tool(Variable Displacement Compressor Tester) - Image 3](https://m.media-amazon.com/images/I/51ANGcKfHjL.jpg) ![ECV520i Car Accessories AC Compressor Electronic Compressor Control Valve Testing Tool(Variable Displacement Compressor Tester) - Image 4](https://m.media-amazon.com/images/I/719Ek4l3C3L.jpg) ![ECV520i Car Accessories AC Compressor Electronic Compressor Control Valve Testing Tool(Variable Displacement Compressor Tester) - Image 5](https://m.media-amazon.com/images/I/71UrJl5PWtL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐ Good tool *by N***A on 4 September 2024* Very good tool. Looks exactly like the picture. It comes with the instruction and all the cables. It comes with a big casing ### ⭐⭐⭐ Review *by M***Y on 18 July 2024* On my vehicle a 2012 Mercedes SLK250 this ECV520I tester could not show a reading of the voltage and duty signal going to the compressor control valve from the vehicle. The issue was that the vehicle detects that the compressor control valve is not connected and will not try and power the valve. Support was of no help with this issue. I was able to get the ECV520I to show the values from the vehicle, by making a "Tee" harness which allowed the compressor control valve to be connected along with the ECV520I. The included manual with the tester is out of date, the manual details connectors not found in the kit. Test of the compressor control valve worked as expected. ### ⭐⭐⭐⭐ Review *by M***A on 8 October 2022* El equipo funciona muy bien la verdad que si, pero esta incompleto y no hay manera de hacer contacto para que se envie el conector faltante, solo la devolucion total de producto. Realmente frustrante la cuadratura de la pagina pero el equipo realmente funciona muy bien. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/467436559-ecv520i-car-accessories-ac-compressor-electronic-compressor-control-valve-testing](https://www.desertcart.tn/products/467436559-ecv520i-car-accessories-ac-compressor-electronic-compressor-control-valve-testing) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-05-05*