AEM Flex Fuel Wideband Failsafe Gauge Includes FF Sensor 304911 User Manual

Page 12 
Data Logger 
 
The Wideband Ethanol Boost has an internal logger that can store approximately 2.5 hours of data.  The system 
maintains two levels of data logs.  First, all AFR data points are stored and downloadable for viewing on the AFR vs. 
Pressure Graph in the W ideband Ethanol Boost Configuration tab.  Second, all inputs, outputs, and alarm triggers are 
logged in special log file format for viewing with the AEMdata software that comes as part of the W ideband Failsafe 
download package....

Page 13 
Output Configuration 
 
The Wideband Ethanol Boost has one ground (low side) output that is triggered when an alarm condition exists.  This 
output can be used in a multitude of ways to reduce boost, retard ignition timing, or otherwise protect an engine in the 
event there is a problem with the fuel system.  The following is an index of possible auxiliary devices that can be triggered 
by the alarm output: 
 
AEM EMS 
Function Description 
Nitrous Fuel & Ignition 
Maps 
Use the ground output to...

Page 14 
NC/NO Relay  
 
The following are examples of how a NC/NO relay (Bosch PN 0-332-019-203 or similar) can be configured for use with 
the Wideband Failsafe. 
 
Signal Interrupt: The low side (ground) output from the 
Wideband Ethanol Boost can be used to turn ON a NC 
(normally closed) relay and interrupt the output signal 
from a boost controller to its boost solenoid (shown 
below). NOTE: Be sure that pulling power from the boost 
solenoid will decrease boost down to the wastegate 
spring...

Page 15 
Appendix II - Changing Faceplate / Bezel 
 
The Wideband Ethanol Boost gauge comes with the black bezel and Air/Fuel-Gasoline faceplate installed. However, a 
silver bezel and multiple faceplates are also included.  To change them, orient the gauge so you are looking at the 
faceplate.  Rotate the bezel counter-clockwise to unscrew it from the gauge cup.  The bezel, lens, and rubber spacer are 
all removable.  Next, remove the faceplate, but note the two keyways on each side. W hen inserting the...

Page 16 
Before inserting the terminals into the 
connector, refer to the figure to be sure that the 
locking mechanism on the terminals is 
positioned properly in the connector. 
 
 
  
Insert the AEMnet+ terminal (white wire) into 
the available Pin 13 on the Wideband Ethanol 
Boost connector. Push the wire in until the 
locking mechanism on the terminal and 
connector lock into place. Pull lightly on the 
white wire to confirm the locking mechanism 
has latched. This figure shows the correct...

Page 17 
 
Appendix V – AEMnet Messages 
 
Message 
ID: 0x00000026 (29-bit) 
 Rate: 10mS continuous 
Byte Label Data Type Scaling Offset Range 
0 Lambda 16 bit unsigned .0001 Lambda/bit 0 0 to 6.5535 Lambda 1 
2 Pressure 16 bit unsigned .001 PSI/bit -15 -15 to 50.535 PSI 3 
4 Fuel Temperature 8 bit signed 1 degC/bit  0  -40 degC – 125degC  5 Flex Fuel Ethanol Content 8 bit unsigned 1 %/bit 0 0 – 100% 
6 (bit0) AFR Ready Boolean 0 = false, 1 = true 0 0/1 
6 (bit1) AFR Heater Open Error Boolean 0 = false,...

Page 18 
 
12 Month Limited Warranty 
  
Advanced  Engine  Management  Inc.  warrants  to  the  consumer  that  all  AEM  High  Performance  products  will  be  free  from  defects  in 
material and workmanship for a period of twelve (12) months from date of the original purchase. Products that fail within this 12-month 
warranty period will be repaired or replaced at AEM’s option, when determined by AEM that the product failed due to defects in material 
or  workmanship.  This  warranty  is  limited  to...