O 2 Feedback System - Suzuki DF 90 Service Manual

3-34 ENGINE CONTROL SYSTEM
O FEEDBACK SYSTEM
2
After extended usage, engine components may become deteriorated or worn out.
This might make the A/F (air / fuel mixture ratio) incorrect which could affect exhaust emissions. To correct the
A/F, an O sensor must be temporally installed in the exhaust manifold. This sensor is used to measure the
2
concentration of oxygen in the exhaust gas at engine speeds of 2000, 3000 and 4000 r/min.
The ECM uses the input data from the O
duration map within the ECM itself.
O sensor :
2
Informs ECM of concentration of oxygen in exhaust gas.
18213-74F00 : O
2
NOTE:
For fuel mixture check (O
Manual".
sensor to correct the compensation coefficient of the fuel injection
2
sensor
feedback) operation procedure, refer to "Suzuki Diagnostic System Operation
2
ECM
Feedback