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Chery T11 Service Manual Electric Injection System 9
1) There is the insincere battery voltage; 2) There are some insincere intake manifold absolute pressure signals; 3) There are some insincere engine coolant temperature signals; 4) The fuel injector driving level fails. After the fault flag of the oxygen sensor is set, the fuel quantitative closed-loop control closes, and then the basic injection time stored in the ECU is applied to determine the fuel injection quantity. Installation Hint: The tightening torque of the oxygen sensor is 50 to 60 Nm. After the oxygen sensor is replaced, apply a layer of antirust oil on the new oxygen sensor to avoid that the sensor is difficult to be disassembled after rustiness. Troubleshooting: Mainly examine the good connection of several wires on the sensor, and the short or open circuit among them. The damage of sensor is generally caused due to the lead or phosphorus poisoning. So, you shall pay more attention to the fuel quality. At the same time, the excessive consumption of the engine oil also easily creates the sensor failure. During the specified time interval, the number of the oxygen sensor change shall not be less than the specified number.
Any connection has four pins: 1) No 1 (A) for the oxygen sensor signal low level (to ECU 6#); 2) No 2 (B) for the oxygen sensor signal high level (to ECU 62#); 3) No 3 (C) for the power supply of the main relay; 4) No 4 (D) for the sensor heater wire control (to ECU 61#).
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