SAAB WIS ONLINE

Odor Diagnosis

Odor Diagnosis

Step Action Yes No
DEFINITION: Odor originating or noticed through the HVAC system.
1
Were you sent here from Symptoms or another diagnostic table? Go to Step 2 Go to Symptoms - HVAC Systems - Automatic
2

1. Sit inside the vehicle.

2. Close all of the doors and windows.

3. Start the engine.

4. Allow the engine idle at normal operating temperature.

5. Select the maximum blower speed.

6. Select the PANEL air outlet mode.

7. Select the coldest temperature setting.

8. Cycle through all of the blower speeds, modes and temperatures to define what type of odor is present.

Musty smell

Coolant smell

Oil smell


Does the odor have a musty smell?
Go to Step 3 Go to Step 8
3
Inspect the HVAC filter and the air inlet grille for debris. Refer to Passenger Compartment Air Filter Replacement . Is debris present? Go to Step 4 Go to Step 5
4
Remove any debris. Is the action complete? Go to Step 15 -
5
Inspect for wet carpeting. Is the carpet wet? Go to Step 6 Go to Step 14
6
Inspect for the following conditions:
Water leaks around the windshield

Blockage of the HVAC module drain

Leaks around the door seals


Is a leak present?
Go to Step 7 Go to Step 14
7
Repair the leak as necessary. Is the repair complete? Go to Step 15 -
8
Does the odor have a coolant smell? Go to Step 9 Go to Step 12
9
Inspect the cooling system for leaks. Refer to Loss of Coolant . Is a leak present? Go to Step 10 Go to Step 12
10
Inspect for coolant leaking inside the vehicle or for a film build-up on the windshield. Is the condition present? Go to Step 11 Go to Step 15
11
Replace the heater core. Refer to Heater Core Replacement . Is the repair complete? Go to Step 15 -
12
Does the odor have an oily smell? Go to Step 13 Go to Step 15
13

1. Inspect the engine compartment for any leaks. Refer to the following procedures:

Oil Leak Diagnosis for the 3.0L LF1engine or for the 2.8L LAUL engine

Power Steering Fluid Leaks .

2. Repair any oil leaks.


Is the repair complete?
Go to Step 15
14
A musty odor can be caused by mold or mildew build-up on the evaporator or the heater core or inside of the HVAC module. Refer to Odor correction . Is the action complete? Go to Step 15 -
15
Operate the system in order to verify the repair. Did you find and correct the condition? System OK Go to Step 2