Our Diagnostic Equipment

Advanced Diagnostic Tests for Your Vehicle

Grimmer Motors have developed an electronic tool that allows the user to generate detailed reports about your vehicle. This equipment is used by several well-known companies such as AA and VINZ (Vehicle Inspections New Zealand).

We use advanced code reading technology to quickly and effectively diagnose your car, saving you time and hassle. When your vehicle is scanned, the results are saved to our database to ensure that in the future, we can cater our servicing techniques to your vehicle’s history.

Our scans can then generate a detailed report of your vehicle’s status. This report compares your car’s health to many similar vehicles in our database, giving you the most accurate vehicle health report available.


Benefits of our diagnostic services:

  • We can quickly and easily diagnose dashboard warnings – When a warning lights like the Check Engine light) appears on your dashboard, a fault code is stored in the car’s computer. Our tools can read these codes and use them to determine what is causing the issue
  • Improve fuel economy and performance – Our diagnostic tools can monitor your car’s engine in real-time. This helps us to detect when certain parts of the engine aren’t operating correctly. We can then take the necessary steps to fix the issue. This is especially helpful if you are having misfires, poor fuel economy, or rough/poor engine performance.
  • Fast diagnostics = faster and cheaper repairs – Our diagnostics tools allow us to find issues quickly. This also means you can get your car back on the road quicker.

Main Diagnostic Tools


  • Rennacs Scan Tool
  • Rennacs Relative Compression / Battery / Alternator Tester
  • Rennacs Idle Cylinder Balance Tester
  • Rennacs Live Data Analysis System

Other Scan Tools


  • Hanatech Scan Tool with 4 channel Digital Oscilloscope
  • Hanatech Scan Tool
  • Carman Lite
  • Tech 2
  • Launch
  • MUT – Mitsubishi
  • Snap On
  • Auto Data
  • Pico Scope 4 Channel Digital Oscilloscope
  • Wide Band Exhaust Sensor
  • Conductance Battery Tester
  • Carbon Pile Battery Tester
  • Electronic Vacuum Gauge
  • Electronic Exhaust Pressure Gauge
  • Electronic Timing Lights

Conveniently located in Fairfield, Grimmer Motors have been providing quality service to Hamilton since the company was established in 1934. When you receive diagnostic services through Grimmer Motors, you can trust our fully qualified mechanics to safely and efficiently inspect your vehicle, advising you before further repair work is conducted.

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Live/work in any of the following areas? Grimmer Motors could be extra convenient for you.

  • Fairfield
  • Fairview Downs
  • Enderly
  • Claudelands
  • Peachgrove
  • Hamilton East
  • Chartwell
  • Chedworth
  • Central Hamilton
  • Forest Lake, Beerescourt
  • Frankton
  • Melville
  • Waikato



Grimmer Motors Ltd


Paul Johns

Booked the ol' Fuga in for a service this week. I dropped it off early to take advantage of the free clean and asked if I could have it ready at 3 pm. The service went well and they... pointed out things that would need attention in the future. I like the introduction of the vehicle service and repair log book. Which has all my previous services and fix ups recorded in it. And the Fuga was freshly cleaned and ready at 3pm, like they said. Thanks Team

Cinn Thornton

The team at Grimmer Motors are very friendly and have awesome customer service. My car needed scan as flashing light on dash. The problem was identified , easy to ... understand explanation given and quote for fix provided. Thanks team.

Pip Six

Awesome service. They communicated really well with me about what was going on and then fixed a few extras on the same day I took my van in. A great place.

Lincoln Fernandes

Fast easy reliable and much cheaper compared to dealerships

Hamish O'neill

Great customer service, good communication and works done on time. Thanks Grimmers

Sarah Bowers

Love leaving our car(s) in the friendly and capable hands at Grimmer Motors. Everything from drop off, reception, communication and the work done is of a high standard... and much apprecaited. Another happy customer - thanks Grimmers.