Feedback System - BOMBARDIER Johnson 90 Service Manual

ENGINE CONTROL SYSTEM
02FEEDBACKSYSTEM
02FEEDBACKSYSTEM
After extended usage, engine components may become deteriorated or worn out. This might make the
A/F (air / fuel moisture ratio) incorrect which could affect exhaust emissions. To correct the A/F, an 02
sensor must be temporally installed in the exhaust manifold. This sensor is used to measure the concen­
tration of oxygen in the exhaust gas at engine speeds of
2000. 3000
and
4000
rpm. The ECM uses the
input data from the 0
2
sensor to correct the compensation coefficient of the fuel injection duration map
within the ECM itself.
0
2
sensor:
lnforms ECM of concentration of oxygen in exhaust gas.
ECM
,
Feedback
L----.J
1F ool1
5000002: 0
2
sensor
NOTE:
For fue/ mixture check (0
2
feedback) operation procedure, refer to "Bombardier Diagnostic System
Operation Manual".
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