Table 1: | Air Delivery Improper |
This procedure provides a test of all functions of the heater/defroster unit.
Mode Knob | Temperature Control | Blower Motor Switch | Blower Speed | Power Vent Outlet | Floor Outlet | Defrost Outlet | Side Window Outlet |
---|---|---|---|---|---|---|---|
Vent | Cold | OFF | OFF | No Airflow | No Airflow | No Airflow | No Airflow |
Vent | Cold | 4 | High | Ambient Airflow | No Airflow | No Airflow | No Airflow |
Floor | Cold to Hot | 4 | High | No Airflow | Cold to Hot Airflow | Minimum Cold to Hot Airflow | Minimum Cold to Hot Airflow |
Defroster | Cold to Hot | 4 | High | No Airflow | Minimum Cold to Hot Airflow | Cold to Hot Airflow | Minimum Cold to Hot Airflow |
If any of these settings do not produce the correct results, perform the Improper Air Delivery diagnostic procedure.
Step | Action | Yes | No | ||||
---|---|---|---|---|---|---|---|
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | |||||
2 | Examine the affected door in the unit for proper cable attachment.
Is everything connected properly? | Go to Step 4 | Go to Step 3 | ||||
3 | Repair, as necessary. Is the repair complete? | System OK | -- | ||||
4 |
Does the door move freely through its entire range of travel so that it can close at both ends of the range? | Go to Step 5 | Go to Step 3 | ||||
5 | Inspect the travel of the Bowden cable by turning the control knob. Is the actuator travel OK? | Go to Step 6 | Go to Step 7 | ||||
6 |
Does the system perform properly? | System OK | Go to Step 9 | ||||
7 |
Is there a problem with the cable attachment or the control? | Go to Step 8 | Go to Step 9 | ||||
8 | Repair the cable attachment or control as necessary. Is the repair complete? | System OK | Go to Step 9 | ||||
9 | Inspect the system using the Control Settings/Correct Results tests in this procedure. Is the repair complete? | System OK | Go to Step 10 | ||||
10 | Inspect for airflow from the defroster or the vent outlets. Is there high airflow from the defroster or the vent outlets? | Go to Step 11 | Go to Step 12 | ||||
11 | Adjust the heater door at the floor and the vent door to get the proper airflow. Is the repair complete? | System OK | -- | ||||
12 | Switch the mode knob to defrost. Is the defroster airflow OK? | Go to Step 13 | Go to Step 14 | ||||
13 |
Is the repair complete? | System OK | -- | ||||
14 | Inspect the blower speeds for change in the airflow. Does the blower speed increase as the control is turned from 1 to 4? | Go to Step 15 | Go to Blower Motor Malfunction | ||||
15 |
Is the repair complete? | System OK | Go to Step 16 | ||||
16 |
Did the airflow change? | Go to Step 17 | Go to Step 18 | ||||
17 |
Is the repair complete? | System OK | -- | ||||
18 |
Is the repair complete? | System OK | -- |