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Home >> Toyota >> 2012 >> Sienna XLE, AWD >> Repair and Diagnosis >> Restraints >> Restraints Control Systems >> Pre-Collision System [Diagnostic Codes & Circuit Tests] >> Pre-Collision System >> DTC C1A4A: Skid Control Buzzer Circuit >> Procedure

DTC C1A4A: Skid Control Buzzer Circuit: Procedure

  1. CHECK BUZZER 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the Techstream main switch on, and turn the cruise control main switch on.
    4. Enter the following menus: Radar Cruise / Utility / Beam Axis Adjustment.
      NOTE:

      Completing beam axis adjustment by pressing "Finish" will use the learning values to be reset, so be sure to cancel beam axis adjustment by pressing "Exit" immediately after the buzzer sounds.

    5. Follow the instructions on the Techstream display, and proceed to the next screen.

      OK

      A buzzer will sound for 1 second.

    6. Press "Exit" to cancel beam axis adjustment.

    NG → See step   4 

    OK: Go to next step 

  2. CHECK FOR DTC (PRE-COLLISION 2 SYSTEM) 
    1. Using the Techstream, enter the following menus: Body Electrical / Pre-Collision 2 / Trouble Codes.
    2. Clear the DTCs. Refer to DTC CHECK / CLEAR .
    3. Check for DTCs. Refer to DTC CHECK / CLEAR .

      OK

      DTC C1A4A is not output.

    NG → See step   5 

    OK → See step   3 

  3. USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING 
  4. GO TO VEHICLE STABILITY CONTROL SYSTEM. Refer to  Skid Control Buzzer Circuit 
  5. REPLACE DRIVING SUPPORT ECU. Refer to  REMOVAL