Initial Diagnostic Check; General Information - Buell 2007 FIREBOLT Service Manual

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INITIAL DIAGNOSTIC CHECK

GENERAL
To locate faulty circuits, follow the diagnostic flow charts in
this section. For a systematic approach, always begin with
INITIAL DIAGNOSTICS. Read the general information and
then work your way through the flow chart box by box.
Diagnostic Notes
If a numbered circle appears adjacent to a flow chart box,
then more information is offered in the diagnostic notes. Many
diagnostic notes contain supplemental information, descrip-
tions of various diagnostic tools or references to other parts
of the manual where information on the location and removal
of components may be obtained.
Circuit Diagram/Wire Harness
Connector Table
When working through a flow chart, refer to the illustrations,
the associated circuit diagram and the wire harness connec-
tor table as necessary. The wire harness connector table for
each circuit diagram identifies the connector number, descrip-
tion, type and general location.
In order to perform most diagnostic routines, a Breakout Box
and a DVOM are required. See
form the circuit checks with any degree of efficiency, a famil-
iarity with the various wire connectors is also necessary.
Job/Time Code Values
Dealership technicians filing out warranty claims should use
the job/time code values in Digital Technician.
INITIAL DIAGNOSTICS

General Information

The diagnostic check is identifies problems caused by an
electronic control system malfunction.
NOTE
The engine may be started and run when the trouble codes
are received using a jumper wire on Pins 1 and 2 of the data
link connector. However, if the jumper wire is removed with
the engine running, the check engine lamp will continue to
flash trouble codes. To stop check engine lamp from flashing
codes, turn engine stop switch OFF.
Diagnostic Notes
The reference numbers below correlate with the circled num-
bers on the diagnostic check flow charts. See
Check (Part 1 of 2).
1. Compare engine behavior to tables.
a. Starts hard. See Table 4-4.
b. Hesitates, stumbles, surges, misfires and/or slug-
gish performance. See
c. Engine exhaust emits black smoke or fouls plugs.
See Table 4-6.
4-12 2007 Buell Firebolt: Fuel System
4.6 BREAKOUT BOX. To per-
Diagnostic
Table 4-5.
2. Use HARNESS CONNECTOR TEST KIT (Part No. HD-
41404), black socket probes and patch cord.
3. Connect BREAKOUT BOX (Part No. HD-42682) to ECM.
See 4.6 BREAKOUT BOX.
All diagnostic codes are listed in
Table 4-4. Engine Starts Hard
CAUSE
Engine temperature circuit
Improper fuel pressure
Spark plugs and/or wires
Battery discharged
Cam position sensor
Manifold leak
Ignition coil
Leaky injectors
Valve sticking
Table 4-5. Engine Performance Problems
CAUSE
Engine temperature circuit
Improper ignition timing
Cam position sensor cir-
cuit
Spark plugs and/or wires
Improper fuel pressure
Improper throttle position
sensor adjustment
Manifold leak
Throttle plates not opening
fully
EVAP hose disconnected
from induction module
(CA)
4.8
Table 4-7.
SOLUTION
4.18 TROUBLE CODE 14.
4.13 FUEL PRESSURE
TEST.
4.15 MISFIRE.
See charging system trou-
bleshooting in Section 7.
4.29 TROUBLE CODE 56.
Spray water around induc-
tion module seals with
engine idling. If RPM
changes, change seals.
4.15 MISFIRE.
Test fuel injectors. See
4.42 THROTTLE BODY.
See Section 3.
SOLUTION
4.18 TROUBLE CODE 14.
1.18 IGNITION TIMING.
4.29 TROUBLE CODE 56.
4.15 MISFIRE.
4.13 FUEL PRESSURE
TEST.
Calibrate sensor using
DIGITAL TECHNICIAN
(Part No. HD-44750).
See 4.43 INTAKE LEAK
TEST.
1.16 THROTTLE CABLE
AND IDLE SPEED
ADJUSTMENT.
Connect.