Honda
Toyota
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There is no OBD port on the Honda SMX or Stepwagon 96-01, diagnostics of the Engine Management Light is done via flash codes.
1. Find the 2 pin blue connector, this is located below the glove box, near the heating control side, it can be tucked quite away so look hard. (See images above)
2. Insert a jumper wire (use a paperclip or some wire)
3. Put your key in the ignition and turn forward to the second or "ON" setting
4. The MIL (Engine Light) will turn on, and if any faults in the transmission the D4 light will flash codes. Codes are indicated by counting the number of flashes.
NOTE: Once in diagnostic mode you will only be able to select D4, all other selections are locked out.
Clearing Fault Codes:
The system will automatically clear any faults when the above procedure is done, if there is still a lit engine management light after the ignition has cycled then the fault still exists
