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Steve, Motorcycle Mechanic
Category: Motorcycle
Satisfied Customers: 6983
Experience:  30+ yrs. experience, MMI, HD technician, HD early, engine rebuild/performance, bike builder, kit bike program manager, CCI 2001-2004
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Engine check light came on last night, came on and stayed on

Customer Question

engine check light came on last night
JA: Does the light stay on, or does it blink?
Customer: came on and stayed on all gauges flashed and had no speedometer then died wont turn over
JA: What is the model/year of your motorcycle?
Customer: 01 ultra classic
JA: Are you fixing your bike yourself? What have you tried so far?
Customer: well I am trying only thing I had time to do last night after roadside retrievel was test battery showed had voltage but failed load test
JA: Anything else you want the mechanic to know before I connect you?
Customer: seemed to run fine until very end and just died
Submitted: 8 months ago.
Category: Motorcycle
Expert:  Steve replied 8 months ago.

check for diagnostic codes.

1. Remove right side saddlebag and side cover if so equipped. Remove protective plug from data link connector. Other models will be under the seat.

2. To activate the diagnostic feature,follow these steps.
a. Create diagnostic test wire or use a female spade clip which will bridge the two terminals perfectly.
b. Install diagnostic test wire/clip across Terminals 1 and 2 on the data link connector, they are marked.
c. Turn Ignition/Light Key Switch to IGNITION and wait approximately 10 seconds (4 seconds lamp ON, 6 seconds lamp OFF) for check engine lamp to start flashing.

3. All trouble codes are sent out as a series of flashes. To retrieve the first digit of the trouble code simply observe the number of times the lamp flashes.
a. The lamp will then flash one or more times to indicate the first digit of the trouble code.
b. The length of time the lamp is illuminated and the length of time in which it is off are each about 0.5 second in duration.

4. The second digit follows:
a. Following the transmission of the first digit, there is a 1.2 second pause in which the lamp is off.
b. The lamp will then flash one or more times to indicate the second digit of the trouble code. Count the number of times the lamp flashes to retrieve the second digit.

5. If more than one trouble code is sent:
a. Following transmission of the second digit of the first code, there is a 3 second pause in which the lamp is off.
b. Once all codes have been sent, the data string is repeated. When you have recorded the same trouble code twice, it is an indication that the transmission has been restarted and that all trouble codes have been retrieved.

IMPORTANT NOTE ..If diagnostic test wire is installed across Pins 1 and 2 on connector in lieu of a Scanalyzer, the ECM is placed in a diagnostic test mode and the engine will start. The test wire must be removed from the data connector and the ignition switch turned OFF or the check engine lamp will continue to flash codes. A historic trouble code resides in the memory of the ECM until the code is cleared by use of the Scanalyzer or a total of 50 trips has elapsed. A “trip” consists of a start and run cycle, the run cycle lasting at least 30 seconds. After the 50 trip retention period, the trouble code is automatically erased from memory (that is, assuming no subsequent faults of the same type are detected in that period).

let me know what you find and I'll help you decipher the code.


Expert:  Steve replied 7 months ago.

let me know if you need more help.

if not, please leave a POSITIVE RATING.



Expert:  Steve replied 4 months ago.

let me know if you need more help.

if not, please leave a POSITIVE RATING.

thank you,


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