B1795

SUPPLEMENTAL RESTRAINT SYSTEM: OCCUPANT CLASSIFICATION SYSTEM: B1795: Occupant Classification ECU Malfunction

DTC B1795 - Occupant Classification ECU Malfunction

DESCRIPTION

DTC B1795 is set when a malfunction is detected in the occupant classification ECU.
Troubleshoot DTC B1771 first when both DTCs B1771 and B1795 are present.





HINT:
- When DTC B1650/32 is detected as a result of troubleshooting the airbag system, perform troubleshooting for DTC B1795 of the occupant classification system.
- Use a Techstream to check for DTCs of the occupant classification ECU, otherwise the DTCs cannot be read.

INSPECTION PROCEDURE

PROCEDURE

1. CHECK FOR DTC
(a) Turn the ignition switch ON, and wait for at least 60 seconds.
(b) Clear any DTCs stored in the memory.
HINT:
- First clear DTCs stored in the occupant classification ECU and then in the center airbag sensor.
- Use a Techstream to clear the DTCs of the occupant classification ECU, otherwise the DTCs cannot be cleared.
(c) Turn the ignition switch off, and wait for at least 10 seconds.
(d) Turn the ignition switch ON, and wait for at least 60 seconds.
(e) Using the Techstream, check for DTCs of the occupant classification ECU .
OK:
DTC B1795 is not output.
HINT: DTCs other than DTC B1795 may be output at this time, but they are not related to this check.

NG -- REPLACE OCCUPANT CLASSIFICATION ECU
OK -- USE SIMULATION METHOD TO CHECK
2. REPLACE OCCUPANT CLASSIFICATION ECU
(a) Turn the ignition switch off.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) Replace the occupant classification ECU.
HINT: Perform the inspection using parts from a normal vehicle when possible.

NEXT -- Continue to next step.
3. PERFORM ZERO POINT CALIBRATION
(a) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(b) Connect a Techstream to the DLC3.
(c) Turn the ignition switch ON, and wait for at least 60 seconds.
(d) Using the Techstream, perform the zero point calibration .
NEXT -- Continue to next step.
4. PERFORM SENSITIVITY CHECK
(a) Using a Techstream, perform the sensitivity check .
Standard range:
27 to 33 kg (59.5 to 72.8 lb)
NEXT -- END