Knowledge of Calibration of screen mounted Advanced Driver Assistance Systems (ADAS) in automotive glass replacement — GQA Qualifications Limited End-Point Assessment Manufacturing & Engineering Revision
This subtopic covers the essential knowledge required for automotive glazing technicians when dealing with screen-mounted Advanced Driver Assistance System
Topic Synopsis
This subtopic covers the essential knowledge required for automotive glazing technicians when dealing with screen-mounted Advanced Driver Assistance Systems (ADAS). It focuses on identifying different ADAS types, understanding calibration procedures (static and dynamic), implementing correct preparation protocols before windscreen replacement, and recognising potential issues such as sensor misalignment or electrical faults. Mastery ensures safe restoration of vehicle safety systems post-glazing work.
Key Concepts & Core Principles
- Health and Safety Compliance: Understanding COSHH regulations, manual handling techniques, and personal protective equipment (PPE) requirements to prevent accidents during glass handling and adhesive use.
- Vehicle Preparation and Protection: Correctly covering vehicle interiors and exteriors to prevent damage from glass fragments, tools, and adhesives, including using protective films and mats.
- Glass Removal and Fitting Techniques: Using specialized tools like cold knives, wire cutters, and suction cups to remove damaged glass without harming the vehicle frame, and fitting new glass with precise alignment.
- Bonding and Sealing Methods: Applying urethane adhesives correctly, including primer application, bead size control, and curing time management to ensure a watertight and structurally sound bond.
- ADAS Calibration Awareness: Recognizing vehicles with advanced driver-assistance systems (e.g., lane departure warning, automatic braking) and understanding that recalibration may be required after windscreen replacement to maintain system accuracy.
Exam Tips & Revision Strategies
- When describing preparation steps, always reference manufacturer-specific procedures and the use of technical data (e.g., Autodata) to prove professional competency.
- For problem-based questions, use the structure: identify the symptom, confirm with diagnostics, isolate cause (e.g., poor bracket alignment, contaminated gel pad), and recommend corrective action.
- In verbal or written answers, mention the safety implications: incorrectly calibrated ADAS can cause accidents, so emphasise the responsibility of the technician to verify system functionality via test drive or diagnostic confirmation.
Common Misconceptions & Mistakes to Avoid
- Assuming all ADAS sensors are visible externally; some are integrated behind the glass or within camera modules, and overlooking them leads to missed calibration.
- Confusing static calibration (performed in workshop with targets) with dynamic calibration (requires road test) and applying the wrong method.
- Failing to disconnect the battery or follow OEM power-down procedures before removal, which can corrupt ADAS module memory.
- Believing that any aftermarket glass with the same dimensions is suitable; ADAS requires glass with specific optical clarity and sensor-compatible coatings.
Examiner Marking Points
- Award credit for accurately listing common ADAS types (e.g., lane departure warning, adaptive cruise control, autonomous emergency braking) and explaining their reliance on a correctly fitted windscreen.
- Expect clear distinction between static and dynamic calibration methods, including when each is required according to vehicle manufacturer specifications.
- Look for evidence of systematic pre-replacement checks: verifying ADAS functionality, using diagnostic tools to record fault codes, and ensuring the correct glass (OEM or equivalent with proper sensor mounts) is sourced.
- Credit for explaining potential post-replacement problems such as calibration failure due to environmental factors, incorrect bracket bonding, or ignition of warning lights, along with trouble-shooting approaches.