2007 Buell Lightning: Fuel System 4-17
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CHECK ENGINE LAMP NOT ILLUMINATED AT KEY ON 4.9
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 4-12.
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 fuse.
● Check for failed bulb.
Diagnostic Notes
The reference numbers below correlate with the circled num-
bers on the Test 4.9 flow chart.
1. Use HARNESS CONNECTOR TEST KIT (Part No. HD-
41404), black pin probe and patch cord.
2. See Figure 4-14. Inspect connector [10] (black) (3) for
contamination or corrosion. If connection is good,
replace ECM. See 4.30 ELECTRONIC CONTROL MOD-
ULE.
3. Check continuity between instrument connector [39] Pin
7 and ECM connector [10] (black) (3), pin 4.
Figure 4-12. Check Engine Lamp
1. Low fuel lamp
2. Check engine lamp
2
1
9952
Figure 4-13. Electronic Control Module, (XB12Ss)
Figure 4-14. Electronic Control Module (Typical)
8891
1. Data link [91A]
2. ECM connector [11] (gray)
3. ECM connector [10] (black)
4. Electronic control module (ECM)
4
2
3
1
Table 4-9. ECM Connectors
NO. DESCRIPTION TYPE LOCATION
[10] ECM (black) 12-place Deutsch Under seat
[11] ECM (gray) 12-place Deutsch Under seat
[91A] Data link 4-place Deutsch Under seat
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