Attention! The cooling fan is switched on by a temperature sensor and can be switched on at any time, regardless of whether the engine is running or not. Keep your hands, tools and clothing away from the fan.
4. This procedure should be carried out on a cold engine. Without starting the engine, turn the ignition key to position "included", and the air conditioner switch to the position "turned off", and then follow the test procedure applicable to your vehicle.
3.1L engine
5. The cooling fan must be turned off; if so, proceed to step 7. If the fan continues to run, disconnect its relay (how to find it is described in chapter 12, section 6). The fan should stop rotating; if so, proceed to paragraph
6. If the fan continues to rotate, then the black-red wire between the relay and the fan motor has shorted - repair the short and check for proper operation.
6. Using a 12 volt test light, check the dark green/white wire between the relay and the ECM. If the lamp remains off, then the relay is faulty. If it is on, check if the dark green/white wire is shorted. If it does not short, the ECM is most likely bad.
7. Connect the diagnostic terminal to "weight" (how to find the terminal is described in chapter 6, illustrations 2.6a and 2.6b), which should turn on the cooling fan. If the fan is running, proceed to step 13. If the fan is not running, disconnect the fan relay (how to find it is described in chapter 12, section 6). "call" red wire and terminals of the pink and white wire connector on the fan relay by connecting a test lamp to "mass" to these wires. If the lamp lights up on both terminals, proceed to step 8; if it does not light on one or both terminals, repair the short to "mass" or repair an open circuit in which the lamp is not lit.
8. Connect with "weight" diagnostic terminal and "call" circuit dark green with white wire between the fan relay and the electronic control unit (ECM) a test lamp connected to a 12 V source.
9. If the lamp is on, proceed to step 10; if it does not light up, check for open circuit or short circuit. If the check shows a normal circuit condition, then there is a faulty connection in the electronic control unit or the unit itself is faulty.
10. Using fused auxiliary wires, connect the red wire and dark green/white wire connector terminals to the fan relay. If the fan starts, check the relay connectors; if they are OK, there is a malfunction in the relay. If the fan does not start, connect a lamp to the fan motor terminals. If the lamp lights up, replace the motor (see subsection "Fan motor replacement" in this section). If the lamp does not light up, test each terminal by connecting a test lamp to "mass".
11. If the lamp does not light on both terminals, repair the open circuit between the relay and the fan motor. If the lamp lights up on one of the terminals, then there is a break in the black wire "masses".
12. If no faults are found, further inspection should be carried out in a repair shop.
3.8L engine
Note. The front fan is located in front of the cooling system radiator, the rear one is behind.
13. Fans must be turned off; if so, go to step 24. If one or both fans are running, go to step 14.
14. If both fans are running, check the coolant temperature sensors and air conditioner pressure switch. If this check is OK, replace the PCM. If only the front fan is running, proceed to step 15. If only the front fan is on "exhaust" fan, proceed to step 21.
15. Disconnect the front fan relay (how to find it is described in chapter 12, section 6). If the fan is now turned off, proceed to step 16. If the fan is still on, check the black/pink wire and red wire connections to the fan relay and check for shorts on these circuits.
16. Connect a test lamp between the dark blue/white wire terminal on the blower relay and the positive battery terminal. If the lamp lights up, proceed to step 17; if it does not illuminate, replace the front fan relay.
17. Disconnect the air conditioning pressure switch and connect a test lamp to the switch contacts. If the lamp lights up, proceed to step 18. If it does not light up, replace the air conditioning pressure switch.
18. Disconnect the black multi-pin connector from the PCM. With the lamp connected to a 12 volt source, check the connection of the dark green to white wire at the air conditioning pressure switch. If the lamp does not illuminate, there is an open in either the dark green/white wire or the black/white wire to the pressure switch.
19. If the lamp is on, disconnect the green connector from the PCM and connect the lamp to the terminal of the dark blue and white wire of the connector on the front fan relay. If the lamp does not light up, the PCM is probably defective. If the lamp is on, this may be due to a short to "mass" in a circuit between a dark blue with a white wire and a relay.
20. If no faults are found in the front fan circuit, further diagnosis should be carried out in a repair shop.
21. Disconnect the rear fan relay; if the fan continues to run, check the black/red wire and red wire connections to the front fan relay for an open on this circuit.
22. Once the relay de-energizes and the fan stops, check the dark green to white wire connections of the fan relay connector by connecting a 12 volt test light to the positive battery terminal. If the lamp does not light, the relay may be faulty. If it is on, proceed to step 23.
23. Leave the test lamp connected to the dark green/white terminal and disconnect the green PCM connector. If the lamp continues to burn, then there is a short to "mass" in a circuit of dark green with white wires; don't forget to check its terminal connections. If the lamp does not light, the PCM may be defective and should be replaced. If no fault is found in the rear fan circuit, further testing should be carried out by a repair shop.
24. With the ignition on and the engine off, turn on the air conditioner (The engine must be cold for this test). The rear fan should work. If he earned, proceed to the implementation of paragraph 31; if it does not work, proceed to step 34.
Rear fan
25. Disconnect the rear fan relay (how to find this relay is described in chapter 12, section 6). Connect a test lamp to the red wire terminal of the exhaust fan relay and then to the pink/white wire terminal of the relay. If the lamp lights on both terminals, proceed to step 26. If it does not light on one or both terminals, check the connections and repair the open circuit (chains).
26. Connect the auxiliary wire from the red wire terminal to the black/red wire terminal on the rear blower relay. The fan should start; if so, proceed to step 29. If the fan does not work, connect one lamp wire to "mass", and the second to the black-red wire terminal on the fan motor, leaving the red and black-red wire leads connected to the fan relay.
27. If the lamp does not light, repair the open circuit in the black-red wire between the rear fan and the relay; be sure to carefully check the terminals. If the lamp is on, connect it between the fan motor terminals.
28. If the lamp does not light, repair the open circuit "masses" to the fan motor. If the lamp is on, it means that either there is insufficient contact at the fan motor, or the motor itself is faulty.
29. Connect with "weight" terminal "ALDL" (see chapter 6, section 2) and connect the bulb to the dark green/white wire terminal on the exhaust fan relay and a 12 volt power source. If the lamp is on, replace the relay. If it does not light, check for a short or open circuit in the dark green/white wire. If it is not shorted or open, check the power control unit (RSM) and terminals for connecting the fan relay. If everything is fine there, the PCM is probably faulty.
30. If the rear fan still does not work, take the vehicle to a repair shop for an inspection.
Front fan
31. Disconnect the electrical connector from the coolant temperature sensor. Connect the wire between the terminals on the electrical connector - after 6 seconds the fan should start working. If this is the case, proceed to paragraph 32; if not, proceed to step 33.
32. After making sure that the air conditioner is off, disconnect the air conditioner pressure switch. After 6 seconds, the fan should start; if it does not work, take the car to a repair shop for an inspection.
33. Disconnect the front fan relay and connect one of the lamp contacts to "mass", and the other to the pink/white wire terminal of the fan relay, and then to the red wire terminal. If the lamp lights in both cases, proceed to step 34. If the lamp does not light, repair open in the circuit where the lamp does not light.
34. Connect the auxiliary wire to the black/pink and red wire terminals on the front fan relay. The fan should start; if so, proceed to step 38. If the fan does not work, leave the auxiliary wire on the terminals of the black-pink and red wires and connect one of the lamp leads to "mass", and the other to the black/pink wire terminal on the fan motor.
35. If the lamp does not light, check the connections of the black-pink wire to the fan relay and to the engine, and also check for an open circuit. If the lamp lights up, remove it and connect it between the black and black/pink wire terminals on the fan motor.
36. If the lamp does not light, repair the open circuit "masses" from the engine. If the lamp is on, then there is a bad connection at the fan motor or the motor is faulty. To check the fan motor, refer to step 1.
37. If the front fan still does not work, further inspection should be carried out at the repair shop.
38. If the fan motor is running in step 34, connect to "weight" terminal "ALDL" (see chapter 6, section 2) and connect a bulb to the dark blue/white wire terminal on the blower relay and the other bulb lead to a 12V power supply.
39. If the lamp is on, then the relay is faulty. If it does not light, look for an open or shorted circuit in the dark blue and white wire. Also check the navy blue/white rear fan relay terminal and the PCM terminal. If they "are called", apparently, the PCM unit itself is faulty.
40. If the front fan still does not work, then further inspection should be carried out in a repair shop.