Too Cold in Vehicle - Auxiliary

TOO COLD IN VEHICLE - AUXILIARY

TEST DESCRIPTION

Step 1 - Step 9:

Step 10 - Step 18:

Step 19 - Step 23:

The number below refers to the step number in the diagnostic table.
20. 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.