MOT Testing Service: Browser & Brake Tester Updates

Navigating the Latest MOT Testing Service Requirements

The Driver and Vehicle Standards Agency (DVSA) regularly updates its procedures and requirements to ensure road safety and the integrity of the vehicle testing process. Staying informed about these changes is paramount for all approved MOT test centres. This article delves into several key updates, focusing on browser compatibility for the MOT testing service, the correct application of roller brake testers (RBTs) for parking brake tests, specific considerations for certain vehicle models, and important notes on ABS warning lamps.

1. MOT Testing Service Browser Version Mandate

In a move to enhance security and streamline the MOT testing service, the DVSA is phasing out support for older web browser versions. Effective from 31 October 2024, specific older versions of popular browsers will no longer be compatible with the service. This is a proactive measure to safeguard the system against emerging cyber threats and ensure a stable user experience.

The browsers and their versions that will cease to be supported are:

• Google Chrome: Version 30 and older
• Mozilla Firefox: Version 27 and older
• Apple Safari: Version 7 and older

What You Need to Do: Browser Updates

It is imperative for all users of the MOT testing service to check their current browser version. If you are accessing the service with any of the aforementioned versions, you must update your browser to the latest available version before the deadline of 31 October 2024. Failure to do so may result in significant issues when attempting to use the MOT testing service, potentially hindering your ability to conduct tests.

Action Required:

• Identify your current browser and its version.
• If your version is listed above, initiate an update through your browser's settings or official website.
• Regularly check for browser updates to maintain compatibility and security.

This change underscores the importance of maintaining up-to-date software for secure and efficient operation of critical services.

2. Applied Parking Brake Roller Brake Testers (RBTs)

Recent approvals have been granted for certain Class 4 and Class 7 roller brake testers (RBTs) to be used for applied parking brake (APB) tests. These specifically approved RBTs are designed to accurately assess the effectiveness of a vehicle's parking brake, regardless of its transmission type or the specific design of its parking brake system.

When to Use Approved APB RBTs

It is crucial to use only those RBTs that have been officially approved for APB testing. Using an unapproved RBT for this specific test could lead to inaccurate results and non-compliance with MOT testing standards.

Identifying Approved APB RBTs

You can identify an approved APB RBT by checking its identification plaque or certificate of compliance. Approved machines will typically have the last three letters of their EIN (Equipment Identification Number) as 'APB'.

Procedure for Applied Parking Brake Tests

When conducting an APB test using an approved RBT, adhere to the following best practices:

• Consult the manufacturer's instruction manual for the specific RBT.
• Ensure the vehicle is in neutral unless the vehicle's specific documentation dictates otherwise.
• Check if wheel chocks are necessary for any wheels not being tested to prevent vehicle movement.
• Record the readings at which the maximum brake effort is achieved.
• Note whether the wheels locked during the test.

Using the correct equipment and following the prescribed procedures are vital for accurate and compliant parking brake testing.

3. Parking Brakes on Porsche 911 (992) Models

A specific technical detail has emerged concerning Porsche 911 (992) models manufactured from late 2021 onwards. Some of these vehicles are equipped with a single parking brake actuator, typically located on the nearside rear wheel. This configuration requires a different approach to testing the parking brake efficiency.

Identifying a Single Parking Brake Actuator

To determine if a Porsche 911 (992) from the specified period has a single-actuator Electronic Parking Brake (EPB), follow these steps:

1. Park the vehicle on a level surface.
2. Engage the 'Drive' mode (e.g., 'D') while keeping the brake pedal depressed. Ensure the EPB is disengaged.
3. Activate the parking brake by pulling the parking brake switch. The parking brake will engage regardless of the system's configuration.
4. Observe the vehicle's central display. If the transmission automatically shifts to 'P' (Park), it indicates the presence of a single-actuator EPB system.

Testing Procedure for Single-Actuator EPBs

If a vehicle is confirmed to have a single-actuator EPB, the testing procedure for the parking brake must be modified:

• Mandatory Equipment: You must use a roller brake tester equipped with an applied brake test function. Standard roller or plate brake testers without this specific function are not suitable for testing these systems.
• Gradient Test: A gradient test is also required to be carried out.
• Prohibited Test Method: Decelerometer tests are not permitted for vehicles with a single-actuator EPB.

For vehicles where the EPB activates on both rear wheels (i.e., a dual-actuator system), the parking brake should be tested in the conventional manner using a roller or plate tester at approximately 4 mph.

Testing Service Brakes

Further clarification is provided regarding the testing of service brakes:

• Two-Wheel Drive Vehicles: Service brakes on 2WD vehicles should be tested using a roller or plate brake tester.
• Four-Wheel Drive Vehicles: It is strictly prohibited to test the service brakes of 4WD vehicles using a roller brake tester.

Understanding these specific requirements is crucial to avoid incorrect testing and potential failures.

4. Opening Bonnets on Mercedes EQE and EQS Models

Accessing the engine bay of the Mercedes EQE and EQS for MOT testing purposes requires a specific procedure, as the bonnet release mechanism is not designed for routine user access.

Locating the Bonnet Release

The primary bonnet release lever or cable is located within the driver's compartment, adjacent to the On-Board Diagnostics (OBD) port.

Step-by-Step Bonnet Opening Procedure:

1. Open the Bonnet Release Cover: The release mechanism is protected by a cover. This cover may be secured by a small 'self-tapper' screw or a plastic rivet, which will need to be removed.
2. Pull the Release Lever or Cable: Once the cover is removed, you will find a standard release lever or cable. Pulling this will disengage the bonnet catches.
3. Open the Bonnet: Lift the bonnet open. It is recommended to use a suitable prop or have an assistant hold the bonnet securely in the open position during the inspection.
4. Remove Central Cover and 'Scuttle' Trims: As per MOT Special Notice 04-24, the central cover and 'scuttle' trims (located near the windscreen base) cannot be fully removed due to the wiper arms. Instead, you need to remove the trim clips and lift the trim panels to gain access to the necessary components. The wiper arms do not need to be removed. These trims are typically secured by small clips that require a 90-degree turn to release. Access will be provided to components such as the 12v battery, associated cabling, the brake master cylinder, and pumps.
5. Refit Trims and Secure Bonnet: After completing the inspection, ensure that all removed trim pieces are correctly refitted, and the bonnet is securely latched on both sides.

Following these steps ensures safe and compliant access to the engine bay for testing.

5. MG ABS Warning Lamp Anomalies

A common observation in certain MG vehicles is that the Anti-lock Braking System (ABS) warning lamp does not illuminate upon ignition switch-on, as is standard for most vehicles.

Testing ABS Warning Lamps in MG Vehicles

The DVSA has provided specific guidance on how to assess the ABS warning lamp in these MG models:

• No Lamp Illumination on Ignition: If the ABS warning lamp does not light up and then extinguish when the ignition is turned on, the vehicle should not be failed for the reason 'Warning device not working'. This is considered a characteristic of the system in these specific vehicles.
• Lamp Remains On After Ignition: However, if the ABS system detects a fault during the ignition-on sequence, and the warning lamp remains illuminated continuously, the vehicle must be failed for 'Warning device shows a system malfunction'.

It is crucial to differentiate between the lamp's normal behaviour (not illuminating at ignition) and a genuine system fault indicated by the lamp staying on.

Frequently Asked Questions

What happens if I don't update my browser for the MOT testing service by October 2024?

If you do not update your browser to a supported version, you may encounter significant issues or be unable to access the MOT testing service altogether. This could prevent you from carrying out MOT tests.

How can I tell if my roller brake tester is approved for applied parking brake tests?

Approved APB RBTs will have 'APB' as the last three letters of their EIN on the machine's plaque or certificate of compliance.

Are there any special procedures for testing the parking brake on a new Porsche 911?

Yes, for Porsche 911 (992) models from late 2021 with a single rear parking brake actuator, you must use an RBT with an applied brake test function and conduct a gradient test. Decelerometer tests are not permitted.

Do I need to remove the wiper arms on a Mercedes EQE or EQS to access brake components?

No, you do not need to remove the wiper arms. You will need to remove the securing clips for the central cover and 'scuttle' trims and lift them to access the components.

If an MG's ABS light doesn't come on when I start the engine, is it a fail?

No, if the ABS light does not illuminate at ignition switch-on in certain MG vehicles, it is not a fail for 'Warning device not working'. However, if the light stays on after the ignition sequence, indicating a system fault, it would be a fail.

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