Immobiliser & Security System Diagnostics
Modern vehicle security systems protect your vehicle using immobilisers, coded keys, alarm modules and tracking systems. When something goes wrong, the vehicle may refuse to start, the alarm may misbehave, or a security warning may appear — and the cause isn't always obvious. We diagnose and repair immobiliser, key, alarm and security system faults for all makes and models.
Common Symptoms
Immobiliser and security system faults can show up in a number of ways, including:
What We Cover
Key Programming
Replacement key programming, additional keys, and reprogramming following loss or theft. We programme keys for all makes and models using dealer-level equipment — not just main dealer vehicles.
Immobiliser Diagnostics
If the engine won't start and the immobiliser is suspected, we diagnose the key, transponder, immobiliser module and the communication between them to find the actual cause — rather than simply replacing parts.
Alarm System Faults
False alarms, alarms that won't arm or disarm, or alarms sounding with no obvious cause can often be traced to a sensor, wiring, power supply or control module fault rather than the alarm unit itself.
Vehicle Tracking Systems
We diagnose and resolve faults with factory-fitted and aftermarket vehicle tracking and security systems, including communication faults, power issues and integration with the vehicle's immobiliser and alarm.
Keyless & Security Systems
Keyless entry, keyless start and smart key systems are diagnosed across their antennas, module, wiring and software — a keyless fault doesn't always mean the key is faulty.
Anti-Theft System Setup
Following module replacement, security procedures may be required before the vehicle will start or the system will operate correctly. We carry out programming, configuration and security matching.
Key Programming for All Makes
Whether you've lost a key, had one stolen, bought a used vehicle with only one key, or need an additional spare, we programme keys for all makes and models using dealer-level equipment. Keys aren't always the problem when a security fault appears — but when they are, we can supply, programme and configure replacement keys correctly to the vehicle.
We also carry out security procedures following module replacement, so the new module is correctly matched to the vehicle and its existing keys.
Our Diagnostic Approach
A no-start or security fault isn't diagnosed by simply reading a fault code and fitting a part. The key, immobiliser module, antennas, wiring, power supplies, communication networks and software all need to be checked.
We investigate the complete system to find the root cause before recommending any replacement.
- Full vehicle diagnostic scan of security and immobiliser systems
- Key and transponder testing
- Immobiliser module and antenna diagnostics
- Wiring and connector testing
- Power supply and earth testing
- CAN/network communication checks
- Alarm sensor and trigger circuit testing
- Tracking system power and communication checks
- Software and configuration verification
- Programming, coding and security matching where required
All Makes & Models
From everyday hatchbacks to high-end vehicles with advanced keyless and security systems, we provide immobiliser, key, alarm and tracking system diagnostics across the board. Using dealer-level diagnostic equipment and security access, we carry out the correct procedure for your specific vehicle.
Vehicle Won't Start or Security Fault Showing?.
Don't replace keys or modules based on guesswork. OBD_PAL can diagnose the immobiliser, key, alarm or tracking system and find the actual cause — then carry out the correct repair or programming.