2002 Buell X1: Fuel System 4-21
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CHECK ENGINE LAMP NOT ILLUMINATED AT KEY ON 4.10
GENERAL
If the engine stop switch is set to RUN with the engine off,
and the ignition key switch is turned ON, the check engine
lamp should illuminate for four seconds. See
Figure 4-18.
Battery voltage is supplied to the lamp bulb. The lamp bulb is
grounded by the ECM through the BK/Y wire. A lack of power
to the ECM will cause the check engine lamp to be inopera-
tive and also create a no start situation.
DIAGNOSTICS
Diagnostic Tips
Check for the following conditions:
● Check for open in BK/Y wire.
● Check for blown instrument fuse.
Diagnostic Notes
The reference numbers below correlate with the circled num-
bers on the
Te st4.10 flow chart.
1. Use HARNESS CONNECTOR TEST KIT (Part No. HD-
41404), black pin probe and patch cord.
2. See
Figure 4-19. Inspect connector [10] (black) for con-
tamination or corrosion. If connection is good, replace
ECM. See
4.29 ELECTRONIC CONTROL MODULE.
3. Check continuity between instrument connector [39] Pin
8 and ECM connector [10] (black), Pin 4.
a. Gain access to tachometer cover by removing wind-
screen.
b. Remove tachometer cover and pull check engine
lamp from back of tachometer. See
Figure 4-20.
Remove check engine bulb from bulb socket.
c. If continuity is present, check for short to battery on
the BK/Y wire between connectors [39] and [10].
d. If no continuity, check for damaged/open wires in the
check engine lamp circuit.
Figure 4-18. Check Engine Lamp
Figure 4-19. Electronic Control Module
Figure 4-20. Check Engine Lamp Bulb
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