Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001BW31
Model Year Start: 2019 Model: GR Corolla Prod Date Range: [06/2018 - 09/2022]
Title: SUPPLEMENTAL RESTRAINT SYSTEMS: OCCUPANT CLASSIFICATION SYSTEM (for Gasoline Model): B1795; Occupant Classification ECU Malfunction; 2019 - 2022 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 09/2022]

DTC

B1795

Occupant Classification ECU Malfunction

DESCRIPTION

DTC B1795 is stored when a malfunction is detected in the occupant detection ECU.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B1795

Occupant Classification ECU Malfunction

Occupant detection ECU malfunction

Occupant detection ECU

CAUTION / NOTICE / HINT

NOTICE:

After turning the engine switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

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HINT:

When DTC B1650 is stored as a result of troubleshooting for the airbag system, check the DTCs stored in the occupant detection ECU. When DTC B1795 is output, perform troubleshooting for this DTC first.

PROCEDURE

1.

CHECK DTC

(a) Turn the engine switch on (IG), and wait for at least 60 seconds.

(b) Clear the DTCs stored in the occupant detection ECU.

Body Electrical > Occupant Detection > Clear DTCs

(c) Clear the DTCs stored in the airbag sensor assembly.

Body Electrical > SRS Airbag > Clear DTCs

(d) Turn the engine switch off.

(e) Turn the engine switch on (IG), and wait for at least 10 seconds.

(f) Check for DTCs.

Body Electrical > Occupant Detection > Trouble Codes

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.

(g) Turn the engine switch off.

OK

USE SIMULATION METHOD TO CHECK

NG

2.

REPLACE OCCUPANT DETECTION ECU

(a) Turn the engine switch off.

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

(c) Replace the occupant detection ECU with a new one.

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

NEXT

3.

PERFORM ZERO POINT CALIBRATION

(a) Using the Techstream, perform Zero Point Calibration.

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NEXT

END