These instructions apply to the Mazda CX-5 Mk1 (KE) 2012-2017.
For other models, please choose your vehicle here.
The Mazda CX-5 (Mk1/KE, 2012–2017) has a built-in instrument-cluster Test Mode you can open yourself with no scan tool. Holding the dash trip-reset button while you switch the ignition to ON drops the cluster into a numbered self-test — gauge sweeps, warning-lamp and LCD checks, chimes and live sensor values — a quick, free first check before paying for diagnostics.
What Test Mode is and what it shows
The routine runs the KE cluster through a fixed sequence of self-checks, each shown as a code number in the odometer window. Stepping through it lets you verify:
- Each warning and indicator LED lighting in turn
- The LCD segments and backlight, to catch dead pixels
- Full needle sweeps of the speedometer and tachometer
- Fuel-gauge and coolant-temperature gauge sweeps
- Live numeric fuel-sender values and the dash and turn-signal chimes
The cluster is testing its own gauges and the signals it receives, so a needle that will not sweep is a cluster fault, while one that sweeps fine but misreads on the road points to the sender or its wiring.
How to enter the hidden diagnostic menu
- Switch the ignition fully OFF.
- Press and hold the trip-reset button on the instrument cluster.
- While holding it, set the ignition to ON. On keyless KE models, press the START button twice without pressing the brake; do not start the engine.
- Keep the trip button held until TEST shows in the odometer display, then release.
- Press the trip button to step through the numbered tests.
Reading the gauges and codes
Each press advances to the next code. Start with the LED and LCD checks — a dead lamp or missing display segment is a cluster hardware fault. The gauge codes drive the speedometer, tachometer, fuel and temperature needles through their full travel; watch for sticking or lag. Numeric codes report live fuel-sender and input values, the quickest way to tell a faulty gauge from a faulty sender. Note any abnormal code or reading before exiting.
How to exit
Turn the ignition OFF, or press the START button to quit, then cycle back ON for normal use. Viewing the tests changes nothing, and the cluster runs normally at the next start.
Frequently Asked Questions
How do I reach ON on a keyless CX-5? Hold the trip-reset button and press the START button twice with your foot off the brake. That selects ON, and TEST shows if you keep holding.
Will Test Mode reset my service or oil light? No. It only reads and displays data; the service indicator and trip meters are untouched.
Why does TEST flash up and vanish? You reached START or ENGINE-RUN instead of ON, or released the trip button too soon. Reach ON only, keep holding, and wait for TEST.
Are these the same as check-engine codes? No. They are cluster-level tests and values. If the engine warning lamp is on, scan the engine ECU with an OBD-II tool.
Is it safe to cycle through every test? Yes, with the engine off the tests only drive the gauges, lamps and chimes. Never run the mode while driving.
To look up the meaning of any fault code you record, visit autodtcs.com.
Independent guide — not affiliated with Mazda. Always follow your official service manual and safety precautions. Read our full disclaimer.