LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 2015 >> Corolla S, Standard Trans >> Repair and Diagnosis >> Restraints >> Restraints Control Systems >> Pre-Collision System - Diagnostic Codes & Circuit Tests (Model Code: ZRE172) >> Pre-Collision System >> DTC C1A0A: Front Radar Sensor Region Code Mismatch [08/2016 - ] >> Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC C1A0A: Front Radar Sensor Region Code Mismatch [08/2016 - ]: Procedure

  1. CHECK FOR DTCs (PRE-COLLISION SYSTEM) 
    1. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [08/2016 - ]

      Body Electrical > Pre-Collision 2 > Clear DTCs 

    2. Perform the following procedure.

      HINT: 

      If the following procedure is not performed, the previously output DTC cannot be detected.

      1. Turn the ignition switch to ON and wait 2 seconds or more.
    3. Check for DTCs.

      Refer to DTC CHECK / CLEAR [08/2016 - ]

      Body Electrical > Pre-Collision 2 > Trouble Codes 

      Result

      Result Proceed to
      DTC C1A0A is not output A
      DTC C1A0A is output B

    Result:  1

    USE SIMULATION METHOD TO CHECK:  HOW TO PROCEED WITH TROUBLESHOOTING [08/2016 - 08/2017]  Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2017 - ] 

    Result:  2

    See step  2

  2. REPLACE DRIVING SUPPORT ECU ASSEMBLY 
    1. Replace the driving support ECU assembly.

      Refer to REMOVAL [08/2016 - ]

      Result

      Proceed to
      NEXT

    Result:  1

    NEXT 

    See step  3

  3. CHECK FOR DTCs (PRE-COLLISION SYSTEM) 
    1. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [08/2016 - ]

      Body Electrical > Pre-Collision 2 > Clear DTCs 

    2. Perform the following procedure.

      HINT: 

      If the following procedure is not performed, the previously output DTC cannot be detected.

      1. Turn the ignition switch to ON and wait 2 seconds or more.
    3. Check for DTCs.

      Refer to DTC CHECK / CLEAR [08/2016 - ]

      Body Electrical > Pre-Collision 2 > Trouble Codes 

      Result

      Result Proceed to
      DTC C1A0A is not output A
      DTC C1A0A is output B

    Result:  1

    END (DRIVING SUPPORT ECU ASSEMBLY WAS DEFECTIVE) 

    Result:  2

    See step  4

  4. REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY 
    1. Replace the millimeter wave radar sensor assembly.

      Refer to REMOVAL [08/2016 - ]

    2. Adjust the millimeter wave radar sensor assembly.

      Refer to ADJUSTMENT [08/2016 - ]

      Result

      Proceed to
      NEXT

    Result:  1

    NEXT 

    END (MILLIMETER WAVE RADAR SENSOR ASSEMBLY WAS DEFECTIVE)