Buell 2002 S3T, Service Manual

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2002 Buell S3T: Fuel System 4-71
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Code 24/25 Test
NO
Measure voltage on Terminal B of coil.
Should be equivalent to battery
voltage after key is turned ON.
Is it?
1
YES
Faulty coil
connection or coil.
See Section 7.
Disconnect coil connector [83]. Attach Test
Lamp to [83] as shown in Figure 4-54.
Crank engine.
Do test lamp lights flash when cranked?
NO YES
Measure voltage at ignition relay
Terminal 87 after key is turned ON.
Should be equivalent to
battery voltage. Is it?
YES
Repair open wire or
connection on
GY wire.
NO
Check for multiple codes.
See 4.3 DIAGNOSTIC
INTRODUCTION .
Attach Breakout Box (HD-42682) to ECM. Mea-
sure resistance between ECM and coil terminals
as follows:
Resistance should be less than 0.5 ohms. Is it?
Trouble
Code
Coil
Terminal
ECM
Terminal
24
(Front)
C
(BE/O)
6
25
(Rear)
A
(Y/BE)
7
NO
Repair open wire
or connection.
YES
Perform 4.8 WIGGLE
TEST . Intermittents
found?
NO YES
Repair as
necessary.
2
2
1
1
With the engine off, Scanalyzer (Active Diagnostic
Test Mode) can be used to energize either the front
or rear injector once each second for a total of five
seconds.
2
With the engine off, Scanalyzer (Active Diagnostic
Test Mode) can be used to turn fuel pump on for
periods up to 30 seconds. Power to the pump also
includes power to the fuel injectors and ignition
coil.
SCANALYZER NOTES
Clear codes and confirm proper
operation with no check engine
lamp.
Replace ECM. See
4.29 ELECTRONIC
CONTROL MODULE .
1
2
7856
7875
7860
7870
7865