DTC U0424-81: HVAC Control Module to Hybrid Powertrain Control Module Invalid Serial Data Received [11/2020 - 12/2023]: Procedure

Pre-procedure1

• None.

• Check if DTCs related to the air conditioning system (A/C) are output.

  Body Electrical > Air Conditioner > Trouble Codes 

  Result

  Result	Proceed to
  DTCs are not output	A
  DTCs are output	B

Post-procedure1

• Turn the ignition switch off.

Result: 

A 

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to  REMOVAL [11/2020 - ] 

Result: 

B 

GO TO DTC CHART (AIR CONDITIONING SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [11/2020 - 12/2022]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [12/2022 - 12/2023]