Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
HVAC Verification Test
Perform the following procedures to verify that the repair(s) are valid.
- Make sure that all accessories are turned OFF.
- Make sure that the battery is fully charged.
- Turn the ignition OFF.
- Disconnect all jumper wires and reconnect all previously disconnected components and connectors.
- With the scan tool, record and erase all DTCs from ALL modules.
- Turn the ignition OFF, disconnect the scan tool from the Data Link Connector (DLC). Open the door and close the door. Wait a minimum of 30 seconds, then turn the ignition ON. Reconnect the scan tool.NOTE:
Disconnecting the scan tool and opening and closing the door will allow the controller to enter into sleep mode.
- With the scan tool, perform the HVAC ACTUATOR CALIBRATION TEST.
- Start and run the engine for two minutes while operating all functions of the system that caused the original concern.
- With the scan tool, check for DTCs in all modules.
Are there any DTCs set?
Yes
- Perform the appropriate diagnostic procedure(s). Refer to DIAGNOSTIC CODE INDEX .
No
- Repair is complete.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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