Engine temperature sensor - check
1. The sensor needs to be checked if the engine is difficult to start and if code 13 is detected in the self-diagnosis mode (see above).
2. If the engine does not start and there are obvious signs of incomplete combustion of the fuel, then disconnect the connector and try to start again. If the engine does not start, then unscrew the sensor and check its resistance depending on the temperature (photo). If resistance differs from norm replace the gauge. Otherwise, check the sensor circuit.
9.2 Checking the motor temperature sensor
3. Install the sensor in reverse order.
Exhaust gas temperature sensor test
4. The sensor needs to be checked if code 35 is detected in self-diagnosis mode (see above).
5. If the engine runs erratically during cruise control, disconnect the connector and check the vehicle's ride (photo).
9.5 Exhaust gas temperature sensor connector on V6 and K24 engines
6. If the course of the car improved, replace the sensor. Otherwise, turn on the ignition and check the voltage at the connector pin, which should be about 5 V (photo).
9.6 Checking the voltage between the output of the sensor connector and ground
7. Turn off the ignition and check the circuit for ground (photo).
9.7 Checking the ground circuit of the sensor connector
8. If the voltage is different from 5 V or there is an open in the circuit, then replace the sensor.
Checking the oxygen sensor
9. The sensor needs to be checked if code 33 is detected in self-diagnosis mode (see above).
10. If the engine is unstable in cruise control mode, disconnect the connector and check the car's motion (photo).
9.10 Oxygen sensor connector on V6 and KS4 engines
11. If the course of the car has improved, replace the sensor. Otherwise, increase the speed to 2000 rpm and after 2 minutes make sure that the green signal flashes on the processor unit.
12. On V6 engines, with the ignition on, check the voltage between the terminal of connector A and ground, which should be about 12 V (photo).
9.12 Checking the voltage at the output of the oxygen sensor connector
13. Turn off the ignition and check the circuit for ground (photo).
9.13 Checking the oxygen sensor circuit to ground on V6 engines
Attention! On V6 engines, the ohmmeter circuit should show a circuit between pin A and ground, and on a K24 engine, between pin a and pin 19 of the connector on the processor unit.
14. If the voltage differs from 12 V or there is an open in the circuit, then replace the sensor.
Checking and replacing the air temperature sensor (on the K24 engine)
15. The sensor needs to be checked if code 41 is detected in self-diagnosis mode (see above).
16. Disconnect the sensor connector (photo) and with the ignition on, check the voltage between the terminal of connector B and ground, which should be about 5 V (photo).
9.16a Air temperature sensor connector on K24 engines
9.16b Checking the voltage at the output of the air temperature sensor connector
17. If the voltage is correct, then turn off the ignition and check the circuit between terminal A and ground.
18. Check the resistance of the sensor, which should be 2.1-2.9 ohms at 20°C, and 270-300 ohms at 80°C.
19. If replacement is necessary, unscrew the sensor from the air filter and screw in a new one.