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CHERY·A21 SERVICE MANUAL ENGINE EFI SYSTEM 35 at that time). Notice: if the value always is - 40 there is perhaps ℃ open circuit failure in the circuit. Yes Next step 3 Take off the joint of coolant temperature sensor on the cable, check the resistance values using multimeter between the sensor connector No. 1 and the No. 2 and check if it is corresponding to its temperature (please reference the related section of this service manual). No Replace sensor Yes To step 6 4 Take off the joint of coolant temperature sensor on the cable, check the voltage between pin No.1 and pin No.2 by multimeter and observe if it is around 5V. No Next step Yes Repair or replace cable 5 Check if it is short circuit to ground between ECU pin No.39, No. 35 and sensor connector No.1, No.2. No Next step Yes Diagnosis help 6 Start the engine at idle speed. Observe the value changes of diagnostic tester “coolant temperature”, the value should increase with the increase of the engine coolant temperature. No Replace sensor DTC: P0122 Indicated temperature is much lower of the air intake temperature sensor. No. Operating steps Result Follow up steps 1 Connect the diagnostic tester and commutator, put the ignition switch to “ON”.
Next step Yes Next step 2 Observe “throttle valve absolute opening” item in 10% (specific data is correlated to the vehicle type). No To step No. 5 Yes Next step 3 Step on the accelerator slowly to complete opening and observe “throttle valve absolute opening” item in data flow, check if the value is increased to around 85-90% with the opening of the throttle valve (specific data is correlated to the vehicle type). No To step No. 5 Yes Replace the sensor 4 Repeat step 3 and observe “throttle valve absolute opening” item in data flow, and check if there is jump during the changes. No Next step Yes Repair or replace cable 5 Take off the joint of throttle valve positioning sensor on the cable, check if there is short circuit to ground between pin No.17, No.32, No.16 of ECU and pin No.1, No.2, No.3. No Next step Yes Replace sensor 6 Check the voltage between pin No.1 and pin No.2 by multimeter and observe if it is around 5V. No Diagnosis help |