HYBRID CONTROL SYSTEM, Diagnostic DTC:U042481

DTC Code DTC Name
U042481 HVAC Control Module to Hybrid Powertrain Control Module Invalid Serial Data Received

DESCRIPTION

If the hybrid vehicle control ECU receives an invalid compressor control request from the air conditioning amplifier assembly via CAN communication, it will store this DTC.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate
U042481 HVAC Control Module to Hybrid Powertrain Control Module Invalid Serial Data Received

Invalid control request received from the air conditioning amplifier assembly

(1 trip detection logic)

 Air conditioning amplifier assembly Does not come on

Master Warning Light:

Does not come on

CONFIRMATION DRIVING PATTERN

Tech Tips

After repairs have been completed, clear the DTCs and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

Click here


  1. Connect the GTS to the DLC3.

  2. Turn the power switch on (IG) and turn the GTS on.

  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

  4. Turn the power switch off and wait for 2 minutes or more.

  5. Turn the power switch on (IG) and turn the GTS on.

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

  7. Turn the air conditioning system off and wait for 10 seconds or more with the power switch on (READY).

  8. Enter the following menus: Powertrain / Hybrid Control / Utility / All Readiness.

  9. Check the DTC judgment result.

    Tech Tips


    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

    • If the judgment result shows INCOMPLETE or N/A, perform driving pattern again.

PROCEDURE


  1. CHECK DTC OUTPUT (AIR CONDITIONER)


    1. Connect the GTS 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.


      Body Electrical > Air Conditioner > Trouble Codes
      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.


    A

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

    B

    GO TO DTC CHART (AIR CONDITIONING SYSTEM) Click here