Buell 2008 XB SERIES Electrical Diagnostics Manual page 65

Engine temperature circuit
Crankshaft position sensor circuit
Spark plugs and/or wires
Improper fuel pressure
Manifold leak
NOTE - When manifold leak is large enough, IAC will close to
almost 0 and code P0506 will set.
Throttle plates not opening fully
EVAP hose (California models only) disconnected from induction
module
Water or dirt in fuel system
Cooling fan inoperative
Active muffler control inoperative
CAUSE
Engine temperature circuit
Clogged air filter
Leaky injectors
Improper fuel pressure
RANKING DTC
ENGINE
1 P0604
2 P0605
3 P0603
4 P0607
5 P0339
6 P0123
7 P0122
8 P1502
9 P1501
10 P1503
11 P1152
Table 2-11. Engine Performance Problems
CAUSE
Table 2-12. Engine Exhaust Emits Black Smoke or Fouls Plugs
2.18 DTC P0117 (14), P0118 (14)
2.17 DTC P0112 (15), P0113 (15)
Test fuel injectors.
2.15 FUEL PRESSURE TEST
Table 2-13. Trouble Codes and Fault Conditions
CHECK FAULT CONDITION
LAMP
CODE
52 ECM RAM Failure
53 ECM ROM Failure
54 ECM EEPROM Failure
55 ECM Microprocessor Failure
56 Crankshaft Position Sensor Circuit
Intermittent
11 Throttle Position Sensor Circuit High
11 Throttle Position Sensor Circuit Low
45 Side Stand Sensor High/Open
45 Side Stand Sensor Low
45 Side Stand down at vehicle speed
44 Bank Angle Sensor Shorted High
2.18 DTC P0117 (14), P0118 (14)
2.22 DTC P0339 (56)
2.16 MISFIRE
2.15 FUEL PRESSURE TEST
2.9 INTAKE LEAK TEST
A low IAC may also indicate an air intake leak.
Perform throttle cable adjustment. See appropriate Buell Service
Manual
Connect.
Drain and refill with fresh fuel.
2.29 DTC P0691 (36), P0692
2.33 DTC P1470 (21), P1471 (21), P1477 (21), P1478
SOLUTION
2.23 DTC P0502 (43), P0503 (43), P0608 (37)
2.26 DTC P0603 (54), P0604 (52), P0605 (53),
P0607 (55)
2.26 DTC P0603 (54), P0604 (52), P0605 (53),
P0607 (55)
2.26 DTC P0603 (54), P0604 (52), P0605 (53),
P0607 (55)
2.26 DTC P0603 (54), P0604 (52), P0605 (53),
P0607 (55)
2.22 DTC P0339 (56)
2.19 DTC P0122 (11), P0123 (11)
2.19 DTC P0122 (11), P0123 (11)
2.34 DTC P1501 (45), P1502 (45), P1503 (45)
2.34 DTC P1501 (45), P1502 (45), P1503 (45)
2.34 DTC P1501 (45), P1502 (45), P1503 (45)
2.31 DTC P1151 (44), P1152 (44)
2008 Buell XB Diagnostics: Engine Management 2-15
SOLUTION
(36).
SOLUTION
(21).