ECM Check and Reset Quick Guide

These procedures begin on page 5-8 of the service manual.

Tools and Supplies

Tools

• Small wire jumper made from a paper clip

Supplies

None needed.

Disassembly

Remove the rear seat.

Remove the diagnostic connector from its socket.

Procedures

Fault Code Check

Put the side stand down.

Start the engine and let it reach warm idle.

If the FI indicator goes out and does not light or blink, there are no fault codes.

• If the engine will not start, crank it for at least ten seconds and check the indicator.

Turn the ignition switch off.

Using a jumper, short the brown and green/orange wires on the diagnostic connector.

Turn the ignition switch on.

Set the engine stop switch to RUN.

If the FI indicator lights and remains on, there are no fault codes.

Note the number of blinks in each group and consult page 5-12 of the service manual for interpretation.

• Count a long blink (about 1.3 seconds) as ten (e.g, two long blinks and one short blink is code 21).
• Codes 25 and 26 are reversed in the manual. See ServiceManualCorrections for details.

Turn the ignition switch off.

Remove the jumper from the diagnostic connector.

Fault Code Reset

Turn the engine stop switch to the RUN position.

Turn the ignition off.

Using a jumper, short the brown and green/orange wires on the diagnostic connector.

Turn the ignition on.

Remove the jumper from the diagnostic connector.

When the FI indicator lights, short the brown and green/orange wires on the diagnostic connector.

Verify that the FI indicator goes off and then begins blinking.

Full ECM Reset

This procedure is for the Gold Wing but is believed to work on the ST.

Start the engine.

Do not touch the throttle throughout the rest of this procedure.

If the engine is cold, idle until the fans start to run.

If the engine is warm, allow the engine to idle for at least 90 seconds.

Shut off the ignition.

Source: Chris Mixon

Reassembly

Return the diagnostic connector to its socket.

Install the rear seat.

Post-Service Checkout

None required.

-- MarkFeit - 30 Mar 2008