SSANGYONG Rexton Y200 Manual page 595

1F2-74 M161 ENGINE CONTROLS
Circuit Description
In order to control emissions, a catalytic converter is used to covert harmful emissions into harmless water vapor and
carbon dioxide. The ECM has the ability to monitor this process by using a oxygen sensor. The oxygen sensor
produces and output signal which indicates the storage capacity of the catalyst. This in turn indicates the catalyst's
ability to convert exhaust emission effectively. If the oxygen sensor pigtail wiring, connector, or terminal is damaged.
Do not attempt to repair the wiring, connector, or terminals. In order for the sensor to function properly, it must have
a clean air reference provided to it. This clean air reference is obtained by way of the oxygen sensor wire(s). Any
attempt to repair the wires, connector, or terminal and degrade the oxygen sensor performance.
Oxygen Sensor Signal Voltage Inspection
1. Maintain the engine speed is at idle while the coolant temperature is over 80 °C.
2. Measure the oxygen sensor signal voltage between the ECM terminal No. 16 and No. 17.
Specified Value
Notice: If the measured value is not within the specified value, the possible causemay bein cable, oxygen
sensor or ECM
Oxygen Sensor Heating Voltage Inspection
1. Maintain the engine speed is at idle while the coolant temperature is over 80 ° C.
2. Measure the oxygen sensor signal voltage between the ECM terminal No. 11 and No. 9.
Specified Value
Notice: If the measured value is not within the specified value, the possible cause may be in cable, oxygen
sensor or ECM
Oxygen sensor Heating Current Consumption Inspection
1. Turn the ignition switch to "ON" position.
2. Measure the oxygen sensor heating current consumption between the ECM terminal No. 9 and No. 5.
Specified Value
Notice: If the measured value is not within the specified value, the possible cause may be in cable, oxygen
sensor or ECM
0.2 ~ 1.0 V
11 ~ 14 V
0.2 ~ 2.0 V
SSANGYONG Y200