Revision as of 16:05, 28 November 2025

Lotus 20/20 – Setup and Usage Guide

Overview

Lotus 20/20 is the official diagnostics software for post-MY2008 Lotus vehicles (Elise, Exige V6, Evora, Emira, etc.).
Independent users can access it using a paid subscription.
This page covers installation, hardware requirements, subscriptions, Un/Tested and Confirmed working functions and known issues.

How an Independent User Gets a Lotus 20/20 Login

Go to the Lotus Dealer Portal: https://dealerportal.uslotservice.lotuscars.com/login
Select: Register → Register Independent
Note the email and password used – Lotus 20/20 will ask for these when opening.
Submit the registration.

How to Get a Lotus 20/20 Subscription

Log in to the Dealer Portal using the same email/password.
The subscription must be purchased on the same Windows PC that will run Lotus 20/20.
Click your name (top-right) → Subscriptions → Purchase a Subscription.
Select one of the “Lotus2020 Diagnostics” subscription options.
Payment is via PayPal.
Ensure the OBD2/J2534 interface is already installed and detected.
Once paid, Lotus 20/20 Diagnostics will activate.

Lotus User Guide

Vehicle Service Information (VSI) User Guide:
Log in → Diagnostics → READ ME
Go to the Lotus Dealer Portal: https://dealerportal.uslotservice.lotuscars.com/login Last updated: 29/05/2025

System Requirements

Supported

Windows only
Confirmed working: Windows 10 Enterprise
Other versions may work (untested)

Not Supported

MacOS using virtual machines
Parallels (not working)
UTM (not working)
General VM USB pass-through (unreliable)

Reason: Lotus 20/20 uses J2534 USB binding that virtual machines cannot pass through correctly.

Required Hardware (OBD2 / J2534)

J2534 Pass-Thru Interface

A J2534 interface is required for communication with the car.

Cheapest confirmed working option:

TOPDON RLink J2534
Amazon UK (~£208)

Amazon uk/TOPDON-J2534-Programmer-Reprogramming-Diagnostic

Amazon ES/EU (~232 €)

Amazon ES/TOPDON-RLink-J2534-Programador-reprogramación

Notes:

SAE J2534-1 compatible
Must be activated with TOPDON software
USB connection required

Lotus recommended device:

Mongoose Plus MFC3-BT (USB cable required)
Price range £894–£1176 depending on region

Amazon UK/Mongoose-Plus-J2534-Vehicle-Interface-Cable

Amazon ES/Mongoose-Plus-J2534-OEM-inalámbrico-reprogramación

Lotus 20/20 Installation

1. Install J2534 Drivers / API

Download TOPDON RLink software:
https://www.topdon.com/pages/pro-down?fuzzy=RLink%20J2534

Install RLink Assistant
Plug RLink into vehicle OBD2 port
Turn ignition ON
Connect USB cable (device will beep)
Run RLink Assistant to activate and bind
Battery voltage displayed when connected

2. Install Lotus 20/20 Software

Log in to Dealer Portal
Diagnostics → Software Download
Download ZIP under “01. Software”
Extract the ZIP
Run: Getac → LotusInstaller → setup.exe

3. First Use

Ensure the J2534 tool is activated
Lotus 20/20 will auto-detect the interface
Subscription must already be active on this PC

Subscription Details

Available as hourly, daily, or annual subscription
Subscription is locked to the specific PC hardware
Locked to the specific Windows installation
Hardware changes or reinstall may require re-authorisation

Support Contacts

Main technical support email:
LTIL.EmiraSupport@eu.lotuscars.com

Non-responsive email:
diagnostics@lotuscars.com

Customer Care:
+44 (0) 330 094 8047
ukcustomercare@eu.lotuscars.com

Tested and Confirmed Working Functions

Basic

Read engine/ABS/SRS fault codes
Clear DTCs
Steering Angle Sensor (SAS) calibration

Documented functions (tested/untested mix)

1. Live Data Monitoring

Examples: misfires, trims, O2 sensors, coolant temp, MAP/MAF, throttle position, idle behaviour.

2. Throttle Body / DBW Adaptation

Used after throttle body replacement, ECU reset, intake changes, or battery disconnect.

3. ABS / Traction Control Diagnostics

Wheel speed sensors
Brake pressure sensor
Yaw / lateral-G sensor
ABS pump/valve tests (model dependent)

4. Steering Angle Sensor Calibration

Required after wheel alignment, steering wheel removal, or clockspring replacement.

5. Airbag / SRS Diagnostics

Read and clear airbag and pretensioner faults.

6. Fuel Pump and Cooling Fan Tests

Used for diagnosing overheating and no-start conditions.

7. Full Vehicle Scan

ECU
ABS/DPM
SRS
Body Control Module
Immobiliser
CANbus network

8. Immobiliser and Key Status

Shows whether the key is recognised and ECU/immobiliser sync status.

9. CANbus Network Diagnostics

Detects module communication issues and wiring problems.

Notes and Known Issues

USB hubs and adapters can cause dropouts
Some coding functions remain dealer-only
After switching vehicles: key-cycle and re-scan
Disable laptop sleep mode during diagnostics

Troubleshooting

Lotus 20/20 does not detect the J2534 interface

Ensure RLink Assistant is running
Use a direct USB 2.0 port
Avoid USB hubs or adapters
Verify RLink activation
Ignition must be ON

@@ Line 86: / Line 86: @@
    <li>Price range £894–£1176 depending on region</li>
 [https://www.amazon.co.uk/Mongoose-Plus-J2534-Vehicle-Interface-Cable/dp/B09D4Z9M8Y/ref=sr_1_1?crid=2M1WT8HQS3TG9&dib=eyJ2IjoiMSJ9.kak4_sGF39yrhcNTDqDfEkBqVVEvginTzjutyDo_uiw.4GJkLiQHWorXQgfOkdm6ukVecSkSFOTfWxPDNW1mU80&dib_tag=se&keywords=Mongoose%2BPlus%2BMFC3&qid=1764336312&sprefix=mongoose%2Bplus%2Bmfc3%2Caps%2C91&sr=8-1&ufe=app_do%3Aamzn1.fos.a56bf500-33e2-4a49-b21f-ee6fbd593a4c&th=1 Amazon UK/Mongoose-Plus-J2534-Vehicle-Interface-Cable]
+[https://www.amazon.es/Mongoose-Plus-J2534-OEM-inalámbrico-reprogramación/dp/B09D4Z9M8Y/ref=sr_1_4?__mk_es_ES=ÅMÅŽÕÑ&crid=3Q1JBX7HQNL0W&dib=eyJ2IjoiMSJ9.POHdzOzw_HNjnlZScLk7Azuu_Ivj-szfsZbMFkEAutjPzOVm_CAdZdV3FoqpK_lftbYyMSP0ObRj1vIvmaGZPw.UFKWSxxg8mg8vlXm70r6zHqQVlYH1pWYQkJm2tOhRB0&dib_tag=se&keywords=mongoose%2BPlus%2BMFC3&qid=1764336438&sprefix=mongoose%2Bplus%2Bmfc3%2Caps%2C75&sr=8-4&ufe=app_do%3Aamzn1.fos.24877dfc-f02c-48ff-8c21-7d6151d92275&th=1 Amazon ES/Mongoose-Plus-J2534-OEM-inalámbrico-reprogramación]
 </ul>

Difference between revisions of "Lotus 20/20 diagnostic Software"