MyChron Troubleshooting & Error Codes Guide

AiM MyChron Troubleshooting & Error Codes Guide

This guide lists the most common MyChron 5 and MyChron 6 issues, error codes, and fixes. Written by Rex Harris — professional qualified radio engineer (ACMA/RSM certified) with decades of motorsport electronics experience — and Charlie Harris — national-winning kart racer, Canterbury University engineering student, and kart race engineer — at Harris Race Radios, the authorised NZ & AU importer and supplier of genuine AiM Sport products. Designed to help kart racers in New Zealand and Australia quickly diagnose and solve problems at the track. If you can’t solve it with this guide, contact Rex or Charlie directly.

Contact Harris Race Radios for support →

1. Common MyChron Problems & Quick Fixes

MyChron Won’t Turn On

  • Battery fully discharged — charge for 30–60 minutes before trying again
  • Faulty charger or cable — try another cable or charger
  • Damaged power button — inspect for debris or physical damage

No RPM Reading

  • Wrong engine type selected in MyChron settings — check and correct
  • Loose or disconnected RPM wire — check connection at both ends
  • Too few wraps around spark plug lead — add more wraps (5–7 minimum)
  • RPM wire too close to ignition coil — re-route away from coil

No Temperature Reading

  • Sensor plugged into wrong port — check WT vs CH port assignment
  • Loose sensor thread or washer — tighten and check for coolant leaks
  • Broken sensor cable — inspect for damage near the sensor head
  • Sensor type mismatch — confirm sensor is AiM-compatible NTC or thermocouple

No GPS Lock

  • GPS08 blocked by bodywork or metal — move to a higher, clearer position
  • Interference from ignition coil — re-route GPS cable away from ignition
  • Insufficient satellites — wait 20–40 seconds in open sky before driving
  • Firmware outdated — update via RaceStudio 3

Lap Times Not Recording

  • Track not recognised — manually select track in MyChron menu
  • Start/finish line not set — set manually in RaceStudio 3 and sync to dash
  • GPS signal weak — check GPS08 position and satellite count

2. MyChron Error Codes

Error Code Meaning Fix
E01 – Sensor Not Detected MyChron cannot detect a connected sensor Check cable, port assignment, and sensor type compatibility
E02 – GPS Not Found No satellite lock acquired Move GPS08 to clear sky view, wait 30–40 seconds
E03 – RPM Signal Error RPM signal too weak or noisy Check engine type setting, add more wraps to plug lead
E04 – Low Battery Battery voltage too low to operate reliably Charge MyChron fully before next session
E05 – Memory Full Internal storage is full Download sessions via RaceStudio 3 and delete from dash
E06 – Firmware Error Corrupted or outdated firmware Update firmware via RaceStudio 3 — contact Rex Harris if update fails

3. GPS Troubleshooting Checklist

  • ✅ GPS08 mounted high on nassau panel with clear sky view
  • ✅ GPS cable routed away from ignition coil and spark plug lead
  • ✅ Firmware updated to latest version
  • ✅ Waiting 20–40 seconds for satellite lock before driving
  • ✅ GPS icon showing green (locked) before session starts

4. RPM Troubleshooting Checklist

  • ✅ Correct engine type selected (Rotax, IAME, Vortex, Briggs, Yamaha)
  • ✅ RPM wire wrapped 5–7 times around spark plug lead
  • ✅ Wraps tight and close together, secured with electrical tape
  • ✅ RPM wire routed away from exhaust and ignition coil
  • ✅ No damaged insulation on RPM wire

5. Temperature Sensor Troubleshooting Checklist

  • ✅ Sensor tight in adaptor — no coolant leaks
  • ✅ No broken wires near sensor head
  • ✅ Correct port selected (WT for water temp, CH for CHT)
  • ✅ Replace sensor if readings jump or drop suddenly

6. Trackside Troubleshooting Checklist

  • ✅ Check all sensor cable connections
  • ✅ Verify GPS lock (green icon)
  • ✅ Confirm correct engine type is selected
  • ✅ Check battery level — charge if below 20%
  • ✅ Restart MyChron (hold power button)
  • ✅ If problem persists — contact Rex or Charlie at Harris Race Radios

Frequently Asked Questions

Why is my MyChron not showing RPM?

The most common causes are: wrong engine type selected, too few wraps around the spark plug lead (5–7 minimum), or a loose RPM wire connection. Rex Harris recommends checking all three before assuming a hardware fault.

Why won’t my MyChron get a GPS lock?

The GPS08 needs a clear view of the sky. Move it higher on the nassau panel, route the cable away from the ignition coil, and wait 20–40 seconds in open air before driving.

What does MyChron error code E01 mean?

E01 means a sensor is not detected. Check the cable connection at both ends, confirm the correct port is selected, and verify the sensor is AiM-compatible.

My MyChron memory is full — what do I do?

Connect to RaceStudio 3 via Wi-Fi or cable, download all sessions to your PC, then delete them from the dash.

Who can I contact for MyChron support in NZ and Australia?

Contact Rex Harris or Charlie Harris at Harris Race Radios — Rex is a professional qualified radio engineer (ACMA/RSM certified) and Charlie is an active kart racer and data engineer. As the authorised NZ & AU importer and supplier of genuine AiM Sport products, we have direct access to AiM Sport technical support. Get in touch →

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AiM MyChron NZ & Australia — Buying Guide & Full Product Range →

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