Buell 2008 XB SERIES Electrical Diagnostics Manual page 115

Throttle Position Sensor: DTC P0122 (11); DTC P0123 (11) (Part 2 of 2)
1
YES
Check continuity from
2
connector [11] terminal
"4" to connector [88]
terminal "2".
Is continuity present?
YES
Replace
Throttle Position
Sensor.
Clear codes and confirm proper operation
with no check engine lamp. Codes can be
cleared using DIGITAL TECHNICIAN (Part
No. HD-44750).
Continued from Throttle Position Sensor Test DTC P0122 (11); P0123 (11)
2
Disconnect TPS connector [88]. Measure voltage between terminal "3" (R/
W) wire (+) and terminal "1" (BK/W) wire (-) with Ignition Switch ON.
Does voltage measure 5.0 volts +/- 0.25 volt?
YES
Check resistance between
ECM connector [11] (Gray)
terminal "4" to chassis
Ground.
Is resistance greater
than 1.0 megohm?
NO
Replace
Throttle
Position
Sensor.
NO
Locate and
repair open in
(V/Y) wire.
Measure resistance between connector
(Part 1 of 2).
NO
Turn Ignition Switch OFF. Disconnect ECM connector
1
[11] (Gray). Check for continuity between connector
[88] terminal "3" (R/W) wire and connector [11] (Gray)
terminal "24".
Is continuity present?
YES
Check continuity between
connector [88] terminal "2"
(V/Y) wire and connector
[11] (Gray) terminal "4".
Is continuity present?
YES
Check continuity between connector
[88] terminal "1" (BK/W) wire and
connector [11] (Gray) terminal "27".
Is continuity present?
YES
[88] terminal "1" and terminal "3". Is
resistance greater than 1 megohm?
YES
connector [134]. Measure resistance
Replace ECM.
YES
Replace BAS.
2008 Buell XB Diagnostics: Engine Management 2-65
NO
Locate and
repair open
in (R/W) wire.
NO
Locate and
repair open
in (V/Y) wire.
NO
Locate and
repair open
in (BK/W) wire.
NO
Disconnect Bank Angle Sensor
between connector [88] terminal "1"
and terminal "3".
Is resistance greater than 1
megohm?
NO
Locate and repair short
between (R/W) and
(BK/W) wires.
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