Checking it worked

Connect to the converter, open the CAN tab and look at the badge:

• Signal OK — frames are arriving. Speed and coolant should be live and should match what the Hondata software shows.
• No signal — nothing is being received. Work through, in order: the ECU setting on the converter matching the bus speed above; CAN output actually enabled and uploaded; the ECU power cycled with USB unplugged; and finally CAN High and CAN Low not swapped.

1. Turn the ignition to accessory so the cluster and converter have power. The engine does not need to be running.
2. On your phone or laptop, open the Wi-Fi list and join S2000-Cluster. It can take fifteen seconds or so to appear after power-up.
3. Your device will warn you the network has no internet. That is expected — stay connected to it.
4. Open a browser and go to 192.168.4.1. Type it exactly; some browsers will try to search for it otherwise.

The page header tells you which unit you have. This manual covers the CAN Edition. If yours says something different, you want the other manual.

ECU. This has to match what you are plugged into. It sets both the message addresses and the bus speed, so the wrong choice means nothing is received at all. See the bus speed table under Connecting to the ECU.

Cluster type. AP1 and AP2 clusters need different signals, so the converter has to know which it is driving:

• AP1 — 2000 to 2003. 7 coolant segments, 7 fuel segments.
• AP2 — 2004 to 2009. 20 coolant segments, 10 fuel segments.

This sets the speedometer scaling and reloads the gauge tables for that cluster.

Temperature unit. Switches the coolant display and the threshold grid between °C and °F. Your stored values convert with it — nothing needs re-entering.

Advanced mode. Adds a per-segment fuel threshold table to the Fuel tab, for setting each switch-over point by hand instead of from five calibration points.

Restore defaults. Returns the coolant thresholds and fuel calibration to factory values for your selected cluster. It does not touch your cluster type or speed calibration.

Device info shows the Wi-Fi name, the address to connect to, and the firmware version currently installed. Update Firmware at the bottom opens the update page covered in the last section.

The CAN tab is the main live view:

• Signal OK — the converter is receiving frames from the ECU. If this reads No signal, see the troubleshooting section.
• Speed — road speed in mph, as reported by the ECU.
• Coolant — engine temperature in your chosen unit.
• TWAI running — the CAN hardware started correctly.
• ECU — which ECU profile is selected.

Choose your ECU on the Settings tab. This sets both the message addresses and the bus speed, so it has to match what you are plugged into.

Speed error is usually not the converter. The ECU works out road speed from the transmission sensor and an assumed rolling circumference, so a swapped transmission, a different final drive or non-stock tires shift the number before it ever reaches the converter. This setting corrects the end result whatever the cause.

1. Hold a steady speed with a GPS speedometer running — a phone app is fine. Higher speeds give a more accurate result.
2. Note what the GPS says and what the cluster says.
3. Enter both on the CAN tab under Speed calibration and press Calculate & apply.

Use the same unit for both numbers. The correction is saved immediately and applies from the next moment the speedometer updates.

In the example the cluster was reading 7% low, so the correction becomes 107.5%. Cluster shows is the converter's estimate of what the dash should now be reading, which is a quick way to confirm it took.

The adjustment compounds, so you can refine it. Drive again, check against GPS, and enter the new pair — each pass gets closer rather than starting over.

Reset returns to 100%. You can also type a percentage directly if you already know the figure you want.

The Coolant tab shows the gauge as the cluster displays it, the current temperature, and how many segments are lit.

The Temperature thresholds grid sets the temperature at which each segment lights. The heading says temp above = segment on, so values increase from left to right. Seg 2 is the first to light as the engine warms; the last is the hot end.

Enter your values and press Save to device, or press Extrapolate to space them evenly between the first and last. The box with the amber outline is the segment currently lit.

Switch between °C and °F on the Settings tab. The values in this grid convert with it — you are not re-entering anything.

An AP2 cluster has 20 coolant segments rather than 7, so this grid shows 19 thresholds instead of 6. It works exactly the same way.

Factory defaults are loaded for whichever cluster you select, so in most cases there is nothing to change here at all. Restore defaults in Settings brings them back if you want to start over.

The Fuel tab shows the gauge as the cluster will display it, the raw sensor reading, and which segment is currently lit.

Calibration takes five numbers — the sensor reading at empty, quarter, half, three-quarters and full. Enter what you know and press Extrapolate to fill in the rest, then Save calibration.

Auto-learn is easier if you can run the tank down. Press Start, then Set empty when the tank is empty and Set full after you fill it. Press Commit to save. The converter works out the points in between.

1. Before you go to the car, download the firmware file for your edition from s2000cluster.com. The converter's network has no internet access, so you cannot fetch it once you are connected.
2. Connect to the converter as described earlier in this manual.
3. Go to Settings and press Update Firmware.
4. Choose the file you downloaded and start the upload.
5. Leave the ignition on until it finishes. The converter restarts by itself.
6. Reconnect and check Settings → Device info shows the new version. This manual documents 2.1.0-CAN.