Air Delivery Improper
AIR DELIVERY IMPROPERTEST DESCRIPTION
Step 1:
Step 2-5:
Step 6-8:
Steps 9-12:
Steps 13-19:
The numbers below refer to the step numbers on the diagnostic table.
5. Test the HVAC control module front defrost button and the mode button for proper operation.
6. Can you hear the recirculation door switch from outside air to the recirculation position.
8. Tests the HVAC control module for the proper commanded state. The ON/OFF positions for each mode are as follows:FLOOR POSITION - solenoids 1 and 5 OFF, solenoids 2 and 3 ON, solenoid 4 ON or OFF.VENT POSITION - solenoids 1 and 3 OFF, solenoids 2 and 5 ON, solenoid 4 ON or OFF. VENT/FLOOR POSITION - solenoids 1, 3 and 5 OFF, solenoid 2 ON, solenoid 4 ON or OFF.FLOOR/DEFROST POSITION - solenoids 1, 2, 4 and 5 OFF and solenoid 3 ON.DEFROST POSITION - solenoids 1 and 3 ON and solenoids 2, 4 and 5 OFF.
10. Tests the solenoid circuits for an open or short.
11. Tests the solenoid circuits for an open or short.
12. Tests the vacuum control assembly solenoids.
13. Tests for a constant ground, constant voltage and an open on the solenoid control circuits.