Dtc B1795 Occupant Classification Ecu Malfunction

Vehicle Interior. Yaris. Ncp93, 131
Supplemental Restraint Systems. Yaris. Ncp93, 131

DESCRIPTION

INSPECTION PROCEDURE

CHECK DTC

REPLACE OCCUPANT CLASSIFICATION ECU

PERFORM ZERO POINT CALIBRATION

PERFORM SENSITIVITY CHECK

DTC B1795 Occupant Classification ECU Malfunction


DESCRIPTION

DTC B1795 is recorded when a malfunction is detected in the occupant classification ECU.

DTC No.
DTC Detecting Condition
Trouble Area
B1795
  1. Occupant classification ECU malfunction
  1. Occupant classification ECU

INSPECTION PROCEDURE

1.CHECK DTC

  1. Turn the ignition switch to the on position.

  1. Clear the DTCs stored in the memory (YARIS_NCP93 RM0000010VK06DX.html).

    HINT:
    First clear DTCs stored in the occupant classification ECU and then in the center airbag sensor assembly.

  1. Turn the ignition switch to the lock position and wait for at least 10 seconds.

  1. Turn the ignition switch to the on position.

  1. Check the DTCs (YARIS_NCP93 RM0000010VK06DX.html).

    OK:
    DTC B1795 is not output.
    HINT:
    Codes other than DTC B1795 may be output at this time, but they are not related to this check.


OK
USE SIMULATION METHOD TO CHECK
NG


2.REPLACE OCCUPANT CLASSIFICATION ECU

  1. Turn the ignition switch to the lock position.

  1. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.

  1. Replace the occupant classification ECU (YARIS_NCP93 RM0000012DU00KX.html).

    HINT:
    Perform the inspection using parts from a normal vehicle if possible.

NEXT


3.PERFORM ZERO POINT CALIBRATION

  1. Connect the negative (-) terminal cable to the battery.

  1. Connect the Techstream to the DLC3.

  1. Turn the ignition switch to the on position.

  1. Using the Techstream, perform the zero point calibration (YARIS_NCP93 RM0000010VN06EX.html).

    OK:
    COMPLETED is displayed.

NEXT


4.PERFORM SENSITIVITY CHECK

  1. Using the Techstream, perform the sensitivity check (YARIS_NCP93 RM0000010VN06EX.html).

    1. Confirm that nothing is placed on the passenger seat.

    2. Confirm that the beginning sensor reading is within the standard range.

      Standard range:
      -3.2 to 3.2 kg (-7 to 7 lb)

    3. Place a 30 kg (66.14 lb) weight (e.g. a lead mass) onto the front passenger seat.

    4. Confirm that the sensitivity is within the standard range.

      Standard range:
      27 to 33 kg (59.52 to 72.75 lb)
      HINT:
      When performing the sensitivity check, use a solid metal weight (the check result may not be accurate if a liquid weight is used).

NEXT

END