General - Buell 2008 XB SERIES Electrical Diagnostics Manual

DTC P0691 (36), P0692 (36)

GENERAL

Cooling Fan High Voltage
This code occurs when the engine is running and the ECM has
commanded the fan on, and the voltage remains high at ter-
minals "2" and "3" of ECM [10] (BK) connector.
An engine temperature (ET) sensor signal, indicating a cylinder
head temperature above a preset temperature causes the ECM
to command the fan on. When ignition is OFF, fan may run for
approximately two and a half minutes depending on temper-
ature of vehicle when ignition was turned off. See
Table 2-55. Cooling Fan Specifications
FAN ON
Key ON 455° F (235° C)
Key ON 437° F (225° C)
(HDI)
Key OFF 266° F (130° C)
This code can also set if fan blade does not spin (blocked fan
blade) when fan is commanded on and battery voltage is
applied to fan.
Cooling Fan Low Voltage
This code will set when the ignition key is ON and the ECM
does not sense voltage at terminals "2" and "3" of ECM [10]
(BK) connector.
Table 2-56. Code Description
DTC CHECK
ENGINE
LAMP CODE
P0691 36
P0692 36
2-104 2008 Buell XB Diagnostics: Engine Management
NOTE
Table
FAN OFF
383° F (195° C)
383° F (195° C)
230° F (110° C)
DESCRIPTION
Fan control circuit low
Fan control circuit high
ed01477
2-55.
DIAGNOSTICS
PART NUMBER
B-48115
Diagnostic Notes
Each reference number below correlates to a circled number
on the flow chart(s).
1. Use HARNESS CONNECTOR TEST KIT (Part No. HD-
41404-B), purple pin probe and patch cord.
2. Connect BREAKOUT BOX (Part No. B-48115) to ECM.
See 2.6 BREAKOUT
3. If voltage is present at Breakout Box connector [10] ter-
minal "2" OR "3" but not both, the open must be repaired
but this repair will not correct the concern
4. If cooling fan runs when jumper wire is connected to
Electronic Control Module (ECM) connector [10B] terminal
"2" OR "3" and ground, but not both, the open must be
repaired but this repair will not correct the concern
5. If resistance greater than 1 ohm is found between Elec-
tronic Control Module (ECM) connector [10] terminal "27"
OR "28" and fuel pump [86A] terminal "4", but not both,
the open must be repaired but this repair will not correct
the concern.
Figure 2-84. Cooling Fan
TOOL NAME
BREAKOUT BOX
BOX.
2.29