No Ecm Power; General - Buell 2008 XB SERIES Electrical Diagnostics Manual

NO ECM POWER

GENERAL

A relay controlled by the engine stop switch supplies power to
the ECM. The relay requires a ground to operate. If the ground
is not established, the ECM will not receive power. If the ECM
does not appear to be receiving power, check the ground
sources. An open ignition fuse or ECM fuse can also disable
the ECM.
em01192
Right Handlebar
Switch
W/BK
GY
[11A]
ECM
J1
[11A]
(GY)
Serial data receive 15
Serial data transmit 16
Sensor ground #3 19
J2
[10A]
(BK)
System ground #4 8
Switched ignition 9
System ground #3 16 16
System ground #2 24 24
System ground #1 33 33
[10A]
NO.
[10] ECM (BK)
[11] ECM (GY)
[22] Right handlebar switch
2-36 2008 Buell XB Diagnostics: Engine Management
[22B] [22A]
3 3
W/BK
R/BK
4 4
[11B]
LGN/R
15
16
V/R
19
BK/W
8 BK
9 GY
BK
BK
BK
[10B]
Figure 2-32. ECM Power Circuit (Ulysses, Lightning)
Table 2-20. Wire Harness Connectors
DESCRIPTION
DIAGNOSTICS
PART NUMBER
B-48115
Diagnostic Notes
Each reference number below correlates to a circled number
on the flow chart(s).
1. Connect BREAKOUT BOX (Part No. B-48115) to ECM.
See 2.6 BREAKOUT
4 4
R R
R/BK 3 3 R/BK
2 2 R/GY
R 1 1 R
[33B] [33A]
From
battery
TYPE
34-place Amp (Tyco)
34-place Amp (Tyco)
4-place Multilock
TOOL NAME
BREAKOUT BOX
BOX.
LOCK
Ignition
Switch
R 44
R/Y 41
R 38
35
R
27
R
GY/O 21
W/BK
1
86
85
BK 9
GY/O 5 30
87A
GY 87
4
[91A]
4
GY
1
LGN/R
3
V/R
BK/W 2
LOCATION
Under seat
Under seat
To the right of windscreen
2.13
Key
Switch
Fuse
Battery
Fuse
Ignition
Fuse
Ignition
Relay
Data Link
Connector