Diagnostic System Check - HVAC System - Manual

DIAGNOSTIC SYSTEM CHECK

TEST DESCRIPTION

Steps 1-4:

Step 5:

The number(s) below refer to the step number(s) on the diagnostic table.
3. Lack of communication may be due to a partial malfunction of the class 2 serial data circuit or due to a total malfunction of the class 2 serial data circuit. The specified procedure will determine the particular condition.
4. This step determines if the engine control module (ECM) has set any DTC's related to the HVAC system.