Aftermarket ECU
| Brand | Compatible | Remarks |
|---|---|---|
| Spoon | ✔ | P73-0030-Z1, etc. |
| J's Racing | ✔ | P73 |
| Feel's | ✔ | P73 |
| Apex'i Power FC | ✘ | proprietary communication protocol |
| Hondata | ✘ | all versions, proprietary communication protocol |
| AEM | ? | probably not compatible, proprietary communication protocol |
Chipped Honda ECU
| ROM Editor | Compatible | Remarks |
|---|---|---|
| Crome | ✔ | - classic version only - connected jumpers J4/J12 - no datalogger plugin |
| Ectune | ✘ | proprietary communication protocol |
| Neptune | ✘ | proprietary communication protocol |
In case of chipped ECUs (P28, P30, P06, P75 etc.), the compatibility with Hondash depends on the combination of used ROM editors, installed board jumpers and correctly wired conversion harnesses (if applicable). Check all following points:
JUMPERS
-
jumper J12 or J4 must be connected (usually bridged with a zero ohm resistor), if it was cut or disconnected, reconnect it with a wire
- P28, P30 (non-JDM rectangular chips): J12 jumper
J12 reconnected with a wire
J12 factory stock zero ohm resistor - P30 (JDM square chips): J4 jumper
J4 reconnected with a wire
- P28, P30 (non-JDM rectangular chips): J12 jumper
- jumper J1 must be connected in order to use an external modified map (ROM) stored on a EEPROM chip.
However if the other board jumpers (J12/J4) are connected as described above and you're still not able to get Hondash to communicate (due to used incompatible Rom editor) and you want to restore the compatibility with Hondash at any cost, just cut or remove this jumper J1. The main processor will fallback to use the internal stock map (ROM) instead of the external one stored on the EEPROM chip. Some users also install a switch instead of J1 jumper to switch between internal(stock) and external(modified) maps on the fly.
Please be advised, if your engine is heavily modified (high lift cams, turbo, etc.) it's not recommended to run it on a stock map outside of low engine load conditions (idle, part throttle), take actions at your own risk.
J1 jumper
ROM Editors
-
CROME
- must use classic version only (gold version not compatible)
- datalogger plugin (Plugins » Enhancements » Quick Datalogger +RTP) must NOT be added to the map (ROM) before exporting the map and flashing it into the chip
ECTUNE, NEPTUNE
- both use incompatible proprietary communication protocol
- cutting the J1 jumper is the only solution currently
OBD2(A/B) to OBD1 conversion harnesses
- make sure that the communication 5V wire in the DLC diagnostic connector is correctly connected to a ECU pin (described as "K-line" or "TXD+RXD") by tracing it (using multimeter's continuity test) all the way to the ECU connector pins, using a pin-out diagram for the ECU as your reference.
OBD1 ECU pin-out
