Page 251 - Foton Workshop Manual - Sauvana
P. 251
ENGINE CONTROL SYSTEM - REAR OXYGEN SENSOR 11-25
REAR OXYGEN SENSOR
1. Function and installation
The aim of rear oxygen sensor is to detect the oxygen content in exhaust after
three-way catalytic transformation. The sensor transforms this signal to electrical
signal and sends it to ECM. After comparing the signal of front and rear oxygen
sensors, ECM judges whether three-way catalytic works well.
2. Fault phenomenon and judgment method
(a). Fault phenomenon: Poor idling, poor acceleration, tail gas exceeding standard and 11
too large fuel consumption.
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