AEM 30-2340-N 4-Channel Wideband UEGO AFR Controller - For use with Nascar McLaren ECU User Manual
Page 5
Page 5
warm up. Once the UEGO sensor reaches operating temperature, usually within 30
seconds, the Status LED will turn off and the Ready LED will remain on solid. If a
UEGO sensor error is detected, analog output will switch to approximately +5V and both
LEDs will flash. The Status LED will flash on and off a number of times, followed by a
short pause, signifying an error code. The error codes are listed below in Table 1.
# of Flashes
Fault
Corrective Action
1
UEGO sensor heater open
Check sensor cable for
broken wires/shorts
2
Virtual Ground (VM) Error
3
Nernst Cell (UN) Error
4
Pump current (IP) Error
5
UEGO sensor heater time out
6
UEGO sensor heater short
7
System voltage below 10 volts dc
Check electrical system
for good connections
and proper function
When there is no UEGO sensor connected to a particular channel, the Status LED of
that channel will remain on solid and the Ready LED will turn off after a few minutes.
The remaining channels with UEGO sensors connected will function properly.
When the exhaust back pressure kit (30-2064) is used, the 4 CH UEGO controller will
monitor exhaust back pressure. (NOTE: The 4 CH UEGO controller is designed to
work with a specific AEM pressure sensor. Do not use any sensor other than the
one included in the Exhaust Back Pressure Kit.) If a pressure sensor error is
detected, the 4 CH UEGO controller turns off all Ready LEDs and flashes Status LEDs,
starting with CH1 and ending with CH4. The analog output voltage level for all 4
channels switches to approximately +5V to signify an error.
TABLE 1. Error Codes
FIGURE 5. Indicator Lights
Status Indicator
LED
Ready Indicator
LED