Too Hot In Vehicle - Auxiliary

Too Hot in Vehicle - Auxiliary

Step 1 - 4:

Step 5 - 10:

Step 11 - 16:

Step 17 - 21:

Test Description
The numbers below refers to the step number in the diagnostic table.
7. To request A/C operation the primary HVAC controls must be set to enable the A/C compressor.
11. If the test light remains illuminated the answer is No.
19. The primary HVAC control module controls the coolant bypass valve. It receives a Class 2 message from the auxiliary HVAC control module for the proper position of valve.