Dtc B1795 Occupant Classification Ecu Malfunction

Vehicle Interior. Corolla. Zre142 Aze141
Supplemental Restraint Systems. Corolla. Zre142 Aze141

DESCRIPTION

INSPECTION PROCEDURE

CHECK FOR DTC

REPLACE OCCUPANT CLASSIFICATION ECU

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
Occupant classification ECU malfunction
Occupant classification ECU
HINT:
When DTC B1650/32 is detected as a result of troubleshooting for the airbag system, check the DTCs stored in the occupant classification ECU. When DTC B1795 is output, perform troubleshooting for the DTC.

INSPECTION PROCEDURE

HINT:
  1. If troubleshooting (wire harness inspection) is difficult to perform, remove the front passenger seat installation bolts to access the underside of the seat cushion.
  2. In the above case, hold the seat so that it does not fall down. Holding the seat for a long period of time may damage the seat or deform the seat rails. Hold the seat only as necessary.
1.CHECK FOR DTC

  1. Turn the ignition switch to ON.

  1. Clear the DTCs stored in the occupant classification ECU (COROLLA_ZRE142 RM0000010VK07TX.html).

  1. Clear the DTCs stored in the center airbag sensor assembly (COROLLA_ZRE142 RM000000XFE0H1X.html).

  1. Turn the ignition switch off.

  1. Turn the ignition switch to ON, and wait for at least 10 seconds.

  1. Check for DTCs (COROLLA_ZRE142 RM0000010VK07TX.html).

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


NG
Go to step 2
OK

USE SIMULATION METHOD TO CHECK (COROLLA_ZRE142 RM0000010VJ07XX.html)

2.REPLACE OCCUPANT CLASSIFICATION ECU

  1. Connect the Techstream to the DLC3.

  1. Turn the ignition switch to ON.

  1. Using the Techstream, save the ECU data from the ECU currently installed on the vehicle (COROLLA_ZRE142 RM000001QX402OX.html).

  1. Turn the ignition switch off.

  1. Disconnect the cable from the negative (-) battery terminal.

  1. Replace the occupant classification ECU (COROLLA_ZRE142 RM0000011JG03CX.html).

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

  1. Turn the ignition switch to ON.

  1. Using the Techstream, load the previous ECU data stored into the new ECU (COROLLA_ZRE142 RM000001QX402OX.html).

  1. Turn the ignition switch off.

  1. Turn the ignition switch to ON.

  1. Clear the DTCs stored in the memory (COROLLA_ZRE142 RM0000010VK07TX.html).

    HINT:
    If the DTCs are not cleared at this time, past DTCs will remain.

NEXT


3.PERFORM SENSITIVITY CHECK

  1. Perform the sensitivity check (COROLLA_ZRE142 RM0000010VN07SX.html).


NEXT

END