Too Hot In Vehicle - Auxiliary

TOO HOT IN VEHICLE - AUXILIARY

TEST DESCRIPTION

Steps 1 - 9:

Steps 10 - 21:

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.