Cars · Tuning
P13 JDM ECU Memory Map
Technical reference for P13 JDM ECU memory mapping, including RAM locations and ROM-based rev limit calculations.
RAM Locations
| Location | Bytes | Description | Notes |
|---|---|---|---|
| - | - | - | - |
ROM Locations
| Location | Bytes | Description | Notes |
|---|---|---|---|
| 2EC1 | 1 | Rev Limit | Desired RPM / 45.18 = 8-bit decimal value. Convert to Hex and store at 2EC1. |
Tip
To calculate the hex value for the rev limit, divide your target RPM by 45.18, then convert the resulting decimal value to hexadecimal.
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