Hondata

In your 2003 Accord with the stock ECU, there is no dedicated analog “speedometer wire” carried back to the cluster—instead it works like this:

VSS Sensor → ECU
The green/white wire from the transmission sensor feeds the ECU (pin B11) with raw pulses.

ECU → Multiplex Bus → MICU → Cluster
The ECU ...

Here's an update: I was still experiencing issues with the Yellow Box. While it corrected my speedometer, it caused problems when set to around a 10% alteration. Specifically, it disrupted my VTEC, making it engage at 3600 RPM regardless of the settings in FlashPro. Additionally, my ECU struggled to ...

I recently installed a plug-and-play yellow box, and now my speedometer matches perfectly with the GPS reading. However, I noticed that VTEC started engaging at 3600 RPM. I attempted to adjust the engagement point in Hondata but had no success. To resolve the issue, I split the sensor signal, and ...

I recently purchased a 3.55 gear from p2r, and I noticed my speedometer is reading 8% off. I’ve been searching for a solution for over a week but haven’t found anything viable. Could Hondata kindly consider adding a speed calibration feature, similar to what other tuning platforms offer? This would ...