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1st BYTE
2nd BYTE
XXXX 0000
XXXX 0000
XXXX 0000
XXXX 0001
XXXX 0000
XXXX 0010
....
....
XXXX 0000
XXXX 1111
Device Identification
In response to the DEVICE IDENTIFICATION command, the module sends back 6 bytes
(including a check sum): 0x00, 0x00, 0x02, 0x18, 0x18, 0x0C, 0x00, 0xDA. This will
identify the module as an ETAS LA3 to INCA software.
Simulated O
Sensor (EGO) Output
2
Since the UEGO sensor used by the F/A Monitor has the same thread size as most production
O
sensors (i.e. EGO or HEGO sensors), the production mounting hole can be used.
2
However, if the production O
ECU may go into "back-up" mode. The F/A Monitor avoids this problem by providing a
simulated O
sensor output that can be fed into the ECU.
2
The simulated O
sensor output is a 0V (lean) to 1V (rich) signal that switches at
2
Lambda=1.0. This is the same switch point as the production O
sensor output is available at the short black wire near the blue connector of the wiring
harness. A connection must be made between the black wire and the vehicle's O
signal wire on the vehicle's wiring harness. Note that the production O
electrically and physically disconnected from the vehicle when the simulated O
output is being used.
When using the simulated O
The vehicle's ECU may have a feature to detect if the O
If this is the case, an electrical connection between the O
wires and the vehicle's wiring harness must be made.
The vehicle's ECU may have a feature to detect if the O
pumping current into and out of the O
feature, it may be that the stock O
be used for the UEGO sensor.
COMMAND NO.
0
Stay in Command Mode
1
Device Identification (See Below)
2
Not Used
....
....
15
Exit Command Mode
sensor is not connected to the engine control unit (ECU), the
2
sensor feature, two things must be kept in mind:
2
sensor. Depending on the sophistication of the
2
sensor must be left alone and another mounting location
2
COMMAND
sensor. The simulated O
2
2
sensor's heater is operating properly.
2
(not the UEGO) sensor's heater
2
sensor is operating properly by
2
2
sensor
2
sensor is both
sensor
2
7
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