Buell 2008 XB SERIES Electrical Diagnostics Manual page 88

No ECM Power
NOTE: After replacing ECM or TPS, the
TPS zero set procedure must be performed.
Refer to THROTTLE POSITION SENSOR in
the appropriate BUELL SERVICE MANUAL.
2-38 2008 Buell XB Diagnostics: Engine Management
With Ignition Switch ON, Transmission in neutral
and Engine Stop Switch in RUN position, check the
Battery Fuse, Ignition Fuse and Key Switch Fuse.
Are fuses OK?
YES
Attach Breakout Box (B-48115) to the Electronic Control
1
Module (ECM). Check for battery voltage between Breakout
Box [10] terminals "8" (Black) and "9" (Black).
Is voltage present?
YES
Replace
ECM.
YES
Check for battery voltage on
ignition relay terminal "87" (GY).
Is voltage present?
YES
Repair open
between ECM and
Ignition Relay.
YES
Check for battery voltage
on ignition relay terminal
"30" (GY/O).
Is voltage present?
YES
Check for battery voltage on
ignition relay terminal "86" (W/BK).
Is voltage present?
YES
Replace
Ignition
Relay.
YES
Repair open on (W/BK)
wire between connector
[22] and Ignition Relay.
YES
Replace right
handlebar
switch assembly.
NO
Check for continuity to ground on
Breakout Box terminal "8" (Black).
Is continuity present?
NO
Repair open.
NO
Check for continuity to
ground on ignition relay
terminal "85" (BK).
Is continuity present?
NO
Locate and repair open
on (BK) wire to ground
from ignition relay.
NO
Repair open on (GY/O)
wire between Ignition
Relay and Ignition Fuse.
NO
Check for battery voltage on right
handlebar switch connector [22A]
terminal "3" (W/BK) wire.
Is voltage present?
NO
Check for battery voltage on right
handlebar switch connector [22A]
terminal "4" (R/BK) wire.
Is voltage present?
NO
Repair open on (R/BK) wire between
right handlebar switch connector [22]
and Ignition Switch.
NO
Replace fuse(s)
as needed.
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