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Diagnostic Trouble Codes on DDFI Buell Motorcycles
Dynamic Digital Fuel Injection (DDFI)

Don Scott
1999 Buell S3 Pro Series

Don't want to spend money on a Scanalyzer?

Here's a quick and cost-effective way to get the trouble codes needed for diagnostic purposes.

Only a 2" jumper wire is required to connect pins 1 & 2

Using the jumper wire, connect pins 1 & 2 in the diagnostic port located just behind the steering head. To run the test procedure turn on ignition but do not start engine.

Trouble code is displayed by flashing engine light on the tachometer.

A transmission code of 6 fast flashes followed by a 2 sec pause then a series of slower flashes indicate the first and second digits of the code. Either another code will be displayed or the transmission code will repeat.

Note:
If the jumper wire is remove while the engine is running,
the check engine lamp will continue to flash trouble codes.
Just turn off ignition to clear.

Below is a Table of Trouble Codes, which will enable you to troubleshoot any problems by referring to the Service Manual or certified Service Dealer.

DDFI Trouble Codes

Code No.	Fault Condition
11	Throttle position sensor
13	Oxygen sensor
14	Engine temperature sensor
15	Intake air temperature sensor
16	Battery voltage
23	Front fuel injector
24	Front ignition coil
25	Rear ignition coil
32	Rear fuel injector
33	Fuel pump
35	Tachometer
44	Bank angle sensor
52, 53, 54, 55	ECM failure
56	Cam sync failure

This page's content is of the author's own speculation and is not to be construed as a professional opinion.

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Diagnostic Trouble Codes on DDFI Buell Motorcycles Dynamic Digital Fuel Injection (DDFI)

Diagnostic Trouble Codes on DDFI Buell Motorcycles
Dynamic Digital Fuel Injection (DDFI)