For 1990-2009 cars

Step | Action | Yes | No
--- | --- | --- | ---
DEFINITION: The main fan motor and/or the auxiliary fan motor runs continuously with the ignition switch in the RUN position.
1 | Did you perform the HVAC System Check? | Go to Step 2 | Go to the HVAC System Check
2 | Are both fan motors running continuously? | Go to Step 12 | Go to Step 3
3 | Is only the main fan motor running continuously? | Go to Step 8 | Go to Step 4
4 | Is only the auxiliary fan motor running continuously? | Go to Step 5 | Go to Step 1
5 |

1. Ensure that the engine coolant temperature is below 93°C (199°F)
2. Remove the A/C fan no. 2 relay from fuse and relay block 2.
3. Start the engine.
4. Turn the A/C off.

Does the auxiliary fan motor run?

Go to Step 6

Go to Step 7

6 | Repair the short to ground in the WHT wire between the auxiliary fan motor terminal 1 and fuse and relay block 2. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | Go to the HVAC System Check | --
7 | Replace the A/C fan no. 2 relay. Refer to Condenser Fan Relay Replacement . Is the repair complete? | Go to the HVAC System Check | --
8 |

1. Ensure that the engine coolant temperature is below 93°C (199°F)
2. Remove the fan no. 1 relay from fuse and relay block 1.
3. Start the engine.
4. Turn the A/C off.

Does the main fan motor run?

Go to Step 9

Go to Step 10

9 | Repair the short to voltage in the BLK/RED wire between the main fan motor terminal 2 and fuse relay block 1. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | Go to the HVAC System Check | --
10 | Test for an open in the BLU/BLK wire between the fan no. 1 relay in fuse and relay block 1 and the A/C fan no. 2 relay in fuse and relay block 2. Is an open present? | Go to Step 18 | Go to Step 11
11 | Replace the fan no. 1 relay. Refer to Cooling Fan Relay Replacement in Engine Cooling. Is the repair complete? | Go to the HVAC System Check | --
12 |

1. Remove the A/C fan no. 3 relay from fuse and relay block 2.
2. Start the engine.
3. Turn the A/C off.

Do both fan motors run?

Go to Step 16

Go to Step 13

13 |

1. Test the A/C MG relay for continuity between terminals 3 and 5. Refer to

   #### Fuse and Relay Block 2

   (1) | A/C MG Relay
   (2) | A/C FAN No.3 Relay
   (3) | A/C FAN No.3 Relay
   (4) | Dimmer Relay
   (5) | CDS Fuse 30A
   (6) | HEAD (LH-LWR) Fuse 10A
   (7) | HEAD (RH-LWR) Fuse 10A
   (8) | DRL Fuse 7.5A
   (9) | Fuse and Relay Block 2

   in Wiring Systems.
2. Test the A/C fan no. 3 relay for continuity between terminals 3 and 5. Refer to

   #### Fuse and Relay Block 2

   (1) | A/C MG Relay
   (2) | A/C FAN No.3 Relay
   (3) | A/C FAN No.3 Relay
   (4) | Dimmer Relay
   (5) | CDS Fuse 30A
   (6) | HEAD (LH-LWR) Fuse 10A
   (7) | HEAD (RH-LWR) Fuse 10A
   (8) | DRL Fuse 7.5A
   (9) | Fuse and Relay Block 2

   in Wiring Systems.

Does continuity exist in either relay?

Go to Step 14

Go to Step 15

14 | Replace the faulty relay. Refer to Condenser Fan Relay Replacement . Is the repair complete? | Go to the HVAC System Check | --
15 | Repair the short to voltage in the BLK/WHT wire between the A/C fan no. 3 relay terminal 1 in fuse and relay block 2 and the A/C MG relay terminal 3 in fuse and relay block 2. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | Go to the HVAC System Check | --
16 |

1. Test for an open in the BLU/BLK wire between the A/C fan no. 2 relay and the A/C refrigerant pressure switch connector.
2. Test for an open in the LT GRN wire between the A/C refrigerant pressure switch connector and the fan control switch.

Is an open present?

Go to Step 18

Go to Step 17

17 | Test for an open in the A/C refrigerant pressure switch. Is an open present? | Go to Step 19 | Go to Step 20
18 | Repair the open/short. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | Go to the HVAC System Check | --
19 | Replace the A/C refrigerant pressure switch, if equipped. Refer to A/C Refrigerant Pressure Sensor Replacement . Is the repair complete? | Go to the HVAC System Check | --
20 | Replace the fan control switch. Refer to Engine Cooling Fan Control Switch Replacement in Engine Cooling. Is the repair complete? | Go to the HVAC System Check | --