HYBRID CONTROL SYSTEM, Diagnostic DTC:U0424-537

DTC Code DTC Name
U0424-537 Invalid Data Received from HVAC Control Module

DESCRIPTION

If there is a malfunction in the air conditioning amplifier assembly, DTC U0424-537 will be stored.

DTC No. INF Code DTC Detection Condition Trouble Area
U0424 537

Air conditioning amplifier assembly malfunction:

The power management control ECU receives a communication error signal from the air conditioning amplifier assembly.

(1 trip detection logic)

 Air conditioning amplifier assembly

INSPECTION PROCEDURE

Tech Tips

After the repair, clear the DTCs and perform the following procedure to check that DTCs are not output.


  1. Wait for 1 minute or more with the vehicle stopped, the power switch on (READY), the shift lever in P, and the air conditioning system on (Lo/COOL MAX, blower speed HI).

PROCEDURE


  1. CHECK DTC OUTPUT (AIR CONDITIONER)


    1. Connect the Techstream to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Body Electrical / Air Conditioner / Trouble Codes.

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

      Result
      Result Proceed to
      DTCs related to A/C are not output. A
      DTCs related to A/C are output. B

    5. Turn the power switch off.


    B

    GO TO DTC CHART (AIR CONDITIONING SYSTEM) Click here

    A

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here