DTC U0424-537: Invalid Data Received from HVAC Control Module: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
4. Check if DTCs are output.

   Result

   Air conditioning system DTCs are output.

YES → GO TO AIR CONDITIONING SYSTEM 

NO → REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY