Lexus ES manuals

Lexus ES: HVAC Control Module to Hybrid Powertrain Control Module Invalid Serial Data Received (U042481)

Lexus ES (XZ10) Service Manual / Engine & Hybrid System / Hybrid / Battery Control / Hybrid Control System (for Nickel Metal Hydride Battery) / HVAC Control Module to Hybrid Powertrain Control Module Invalid Serial Data Received (U042481)

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

HINT:

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

Click here

  1. Connect the Techstream to the DLC3.
  2. Turn the power switch on (IG) and turn the Techstream 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 Techstream 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.

    HINT:

    • 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)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Enter the following menus: Body Electrical / Air Conditioner / Trouble Codes.

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

Body Electrical > Air Conditioner > Trouble Codes
Result

Proceed to

DTCs related to A/C are not output.

A

DTCs related to A/C are output.

B

(e) Turn the power switch off.

A

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

B

GO TO DTC CHART (AIR CONDITIONING SYSTEM)

READ NEXT:

 Brake Override System

DESCRIPTION When the vehicle is being driven with the accelerator pedal depressed, depressing the brake pedal without releasing the accelerator pedal will activate the brake override system to restric

 Transmission Control Switch Circuit

DESCRIPTION When the shift lever is in S, different ranges can be chosen using the floor shift sequential gate. WIRING DIAGRAM Refer to the wiring diagram for the shift paddle switch circuit. Click he

 Shift Paddle Switch Circuit

DESCRIPTION Moving the shift lever to S enables the shift range to be selected. The shift range can be selected by operating the "+" or "-" shift paddle switch. WIRING DIAGRAM CAUTION / NOTICE / HINT

SEE MORE:

 ABS Malfunction (C1296)

DESCRIPTION If a malfunction in the speed sensor signal circuit or yaw rate and acceleration sensor (airbag ECU assembly) circuit occurs, the 4WD ECU assembly will output this DTC. The airbag ECU assembly has a built-in yaw rate and acceleration sensor. DTC No. Detection Item DTC Detection Co

 Transmitter ID not Received (Main) (C2126)

DESCRIPTION If ID registration via the automatic ID registration function is canceled or the tire pressure warning ECU and receiver does not receive data from the tire pressure warning valve and transmitters after the tire pressure warning valve and transmitter ID registration is completed using the

© 2016-2025 Copyright www.lexguide.net