Toyota Yaris: Front Radar Sensor System / Internal Control Module Software Incompatibility Not Programmed (U030051,U030057)

Toyota Yaris XP210 (2020-2022) Reapir and Service Manual / Engine & Hybrid System / Cruise Control / Front Radar Sensor System / Internal Control Module Software Incompatibility Not Programmed (U030051,U030057)

DESCRIPTION

The millimeter wave radar sensor assembly receives vehicle information from the ECM via the CAN communication line. If the millimeter wave radar sensor assembly cannot confirm the vehicle information sent from the ECM, the millimeter wave radar sensor assembly stores DTC U030051.

The millimeter wave radar sensor assembly receives vehicle information from the ECM via the CAN communication line. If the vehicle information stored in the millimeter wave radar sensor assembly does not match the vehicle information sent from the ECM, the millimeter wave radar sensor assembly stores DTC U030057.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

U030051

Internal Control Module Software Incompatibility Not Programmed

The millimeter wave radar sensor assembly cannot confirm the vehicle information sent from the ECM.

  • SFI System
  • ECM
  • Millimeter Wave Radar Sensor

U030057

Internal Control Module Software Incompatibility Invalid/Incompatible Software Component

The vehicle information stored in the millimeter wave radar sensor assembly does not match the vehicle information sent from the ECM.

  • SFI System
  • ECM
  • Millimeter Wave Radar Sensor

CAUTION / NOTICE / HINT

NOTICE:

  • When replacing the millimeter wave radar sensor assembly, always replace it with a new one. If a millimeter wave radar sensor assembly which was installed to another vehicle is used, the information stored in the millimeter wave radar sensor assembly will not match the information from the vehicle and a DTC may be stored.
  • When the millimeter wave radar sensor assembly has been replaced with a new one, it is necessary to perform millimeter wave radar sensor assembly beam axis alignment and to clear the vehicle control history. Before performing the Driving Adjustment, make sure to read Before Starting Driving Adjustment.

    HINT:

    Beam axis alignment of the millimeter wave radar sensor assembly can be performed using either Triangle Target, Flat Surface Target or Driving Adjustment.

    Triangle Target: Click here

    Flat Surface Target: Click here

    Driving Adjustment: Click here

  • Before replacing the ECM, refer to Service Bulletin.

PROCEDURE

1.

CHECK FOR DTC (ENGINE)

(a) Check for DTCs of SFI system.

Powertrain > Engine > Trouble Codes

Result

Proceed to

DTCs are not output

A

DTCs are output

B

B

GO TO SFI SYSTEM

A

2.

CHECK FOR DTC (HEALTH CHECK)

(a) Using the GTS, perform a health check.

OK:

ECUs other than the millimeter wave radar sensor assembly do not output specification information mismatch DTCs related to the ECM.

NG

REPLACE ECM

OK

3.

CHECK ECM

(a) Check that the ECM that is installed is a Toyota genuine part.

OK:

The ECM that is installed is a Toyota genuine part

NG

REPLACE ECM

OK

4.

CHECK FOR DTC (FRONT RADAR SENSOR)

(a) Check for DTCs.

Body Electrical > Front Radar Sensor > Trouble Codes

Result

Proceed to

DTCs are not output

A

DTCs are output

B

A

END

B

REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY

    Microwave Integrated Circuit (VCO Circuit) in Front Radar Sensor Internal Electronic Failure (C1A8749-C1A8987,C1A8C08)

    DESCRIPTION When an internal malfunction is detected in the millimeter wave radar sensor assembly, a DTC is stored. DTC No. Detection Item DTC Detection Condition Trouble Area C1A8749 Microwave Integrated Circuit (VCO Circuit) in Front Radar Sensor Internal Electronic Failure When the ignition switch is ON, the millimeter wave radar sensor assembly detects a malfunction in the microwave integrated circuit (VCO circuit)...

    Software Incompatibility with Body Control Module Not Programmed (U032251,U032257)

    DESCRIPTION The millimeter wave radar sensor assembly receives vehicle specification information from the main body ECU (multiplex network body ECU) and ECM via the CAN communication line...

    Other information:

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