ENGINE CONTROL SYSTEM 3-47
O2 FEEDBACK SYSTEM
After extended usage, the 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 O2 sensor must be temporally installed in the exhaust manifold. This sensor is used to measure
the concentration of oxygen in the exhaust gas at engine speeds of 3 000, 4 000, and 5 000 r/min.
The ECM uses the input data from the O2 sensor to correct the compensation coefficient of the fuel injection
duration map within the ECM itself.
" 18213-74F00: O2 sensor
NOTE:
For fuel mixture check (O2 feedback) operation procedure, refer to “Suzuki Diagnostic System Operation
Manual”.
O2 sensor:
Informs ECM of concentration of oxygen in exhaust gas.
ECM
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