Full Vehicle Diagnostics & Auto Electrics — Mobile & Bench Testing | VoltCheck Motors

Full Diagnostics & Auto Electrics

Modern vehicles rely on interconnected electronic systems, CAN networks, sensors, control modules and power distribution circuits.
A single fault in wiring, grounding, communication lines or module power supply can cause no-start conditions, warning lights, intermittent operation or complete system failure.

This service provides professional full-system diagnostics and auto electrics, combining dealer-level scan tools with advanced electrical testing equipment.

We diagnose faults accurately, identify root causes and provide clear, actionable solutions.

What We Do

1. Full-System Diagnostics (All Control Units)

Comprehensive scanning and data analysis across:

  • ECU / TCU / BCM

  • ABS / ESP systems

  • Airbag/SRS system

  • Instrument cluster

  • Body modules and comfort systems

  • Charging and starting circuits

  • Emissions management

  • CAN/LIN communication networks

We identify stored, active and intermittent faults with detailed reporting.

2. Electrical Fault Tracing

Diagnosis of wiring and electrical issues including:

  • open circuits

  • short-to-ground / short-to-power

  • connector failures

  • intermittent faults

  • voltage drops

  • reference voltage issues (5V/12V systems)

  • sensor circuit faults

We verify faults with multimeters, load testing and pin-by-pin analysis.

3. Power & Ground Testing

Many “module faults” are actually caused by:

  • weak grounds

  • poor earth points

  • high resistance

  • voltage instability

  • corroded connectors

We perform:

  • voltage drop testing

  • ground path verification

  • current load testing

  • connector inspection and cleaning

4. CAN/LIN Network Diagnostics

Diagnosis of communication issues:

  • CAN bus line faults

  • high/low resistance

  • module not detected

  • network collapse

  • intermittent data loss

  • incorrect node termination

We test CAN integrity, resistance and network stability using proper tools.

5. Charging & Starting System Diagnostics

Testing of:

  • alternator output

  • battery health

  • starter circuit

  • parasitic drain

  • B+ and ground distribution

We locate faults that cause slow crank, no start or repeated battery failure.

6. On-Site Mobile Diagnostics

In Arklow and surrounding areas we provide:

  • full-system diagnostics

  • wiring checks

  • CAN analysis

  • sensor testing

  • no-start investigation

This reduces downtime and eliminates the need to tow the vehicle.

Typical Problems We Solve

  • intermittent electrical faults

  • no start / crank-no-start

  • warning lights (ABS, airbag, traction, engine, immobiliser)

  • sensor faults & reference voltage issues

  • CAN communication errors

  • BCM/ECU power supply problems

  • alternator/charging issues

  • wiring failures in doors, tailgates, BCM harnesses

  • abnormal battery drain

Diagnostic Tools & Equipment

We use professional-grade equipment, including:

  • Launch X431 Pro

  • breakout boxes

  • multimeters

  • CAN analysis tools

  • bench power units

  • pin-out adapters

  • continuity and load testing tools

All diagnostics are based on proper test methods — no guessing.

Mobile Service Area

Available in:

  • Arklow

  • Wicklow

  • Gorey

  • Wexford

  • Surrounding regions

Workshops and trade clients can also ship modules for bench testing.

Why Choose This Service

  • accurate diagnostics, not parts-swapping

  • advanced electrical testing methods

  • deep experience with CAN and power networks

  • mobile convenience

  • fully documented findings

  • solutions based on verified faults