Saturday, July 13, 2019

How to check if Hondash will work with my ECU?

Follow these simple steps to determine whether the Hondash will work with your ECU.
  1.   3 pin or 5 pin diagnostic connector (DLC)

    All Honda models produced in 1992 - 2001 that use the 3 pin or the 5 pin DLC diagnostic connector are compatible with Hondash. If you can find either the 3 pin or the 5 pin diagnostic connector in your car, your ECU is compatible.
    hondash dlc connector 3 pin
    3 pin DLC connector
    hondash dlc connector 5 pin
    5 pin DLC connector

    Applies to:
    • gasoline engines only
    • United Stated OBD1 '92-'95
    • Worldwide (Europe, Japan, Australia, Russia, etc.) OBD1/2A/2B '92-'01, some markets until '03

    Depending on car model and build year:
    • the 3 pin connector can have either 2 or 3 wires
    • the 5 pin connector either 3 or 5 wires, a communication wire (purple wire in the picture, color may vary among car models) must be present in connector. In this case the "5 to 3 pin adapter" (sold separately) is required as well to connect the Hondash scanner.
    hondash dlc connector 5 pin detail

  2.    3 pin / 5 pin voltage levels

    You may also check voltage levels on pins of the connector to determine its working status. The voltage levels should be following:
    • 5V pin (communication wire 4.85 - 5.10 Volts with ignition switched on)
    • 12V pin (power source wire 11.5 - 14.5 Volts)

    hondash dlc connector 3 pin voltage levels
    3 pin connector voltages
    hondash dlc connector 5 pin voltage levels
    5 pin connector voltages

    In case you're not getting 12V voltage on power wire, you should check for a blown fuse (Under hood fuse / relay box, nr. 43, 7.5 A, ceiling light / cargo area light / DLC connector / Power antenna).
    hondash dlc connector 3 pin without power wire
    OBD1 without power wire
    Furthermore some OBD1 models('92-'95) don't have power wire in DLC connector. In this case the scanner must be wired to an external power source.

  3.   Immobilizer

    If your ECU was modified with a procedure to disable immobilizer on hardware level (installed IMMO OFF board, immobilizer physically removed, etc.) the ECU will very likely not work with Hondash as we've already seen in a few instances involving such mods. It seems as though an immobilizer circuit plays a crucial part in communication with ECU via diagnostics port.

  4.   Aftermarket / Chipped ECU

    If you're using aftermarket, remapped, chipped or otherwise modified ECU, please follow the guide on Aftermarket / Chipped ECU to make sure your ECU will be compatible

Tested / Compatible ECU OBD table

This check is optional, only the above-mentioned steps are important and required to determine compatibility with Hondash. However you may check the table to see what ECU versions have already been tested by us. You may find your ECU listed here, if not, just make sure your ECU meets the criteria described in the above-mentioned steps.