B1795

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

DTC B1795 - Occupant Classification ECU Malfunction

DESCRIPTION

DTC B1795 is recorded when a malfunction is detected in the 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
NOTE: After the power switch is turned OFF, the HDD navigation system requires approximately 6 minutes to record various types of memory and settings. As a result, after turning the power switch OFF, wait 6 minutes or more before disconnecting the cable from the negative (-) battery terminal.
HINT:
- If troubleshooting (wire harness inspection) is difficult to perform, remove the front passenger seat installation bolts to see the undersurface of the seat cushion.
- In the above case, hold the seat so that it does not fall down.

PROCEDURE

1. CHECK FOR DTC
(a) Turn the power switch ON (IG).
(b) Clear the DTCs stored in the occupant classification ECU Reading and Clearing Diagnostic Trouble Codes.
(c) Clear the DTCs stored in the center airbag sensor DTC Check / Clear.
(d) Turn the power switch OFF.
(e) Turn the power switch ON (IG), and wait for at least 10 seconds.
(f) Check for the DTCs Reading and Clearing Diagnostic 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.

NG -- REPLACE FRONT SEAT SET (OCCUPANT CLASSIFICATION ECU)
OK -- USE SIMULATION METHOD TO CHECK
2. REPLACE FRONT SEAT SET (OCCUPANT CLASSIFICATION ECU)
(a) Connect the intelligent tester or Techstream to the DLC3.
(b) Turn the power switch ON (IG).
(c) Using the intelligent tester or Techstream, save the ECU data from the ECU which was installed on the vehicle Registration.
(d) Turn the power switch OFF.
(e) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(f) Replace the front seat set (occupant classification ECU) Disassembly.
(g) Connect the negative (-) terminal cable to the battery.
(h) Turn the power switch ON (IG).
(i) Using the intelligent tester or Techstream, load the previous ECU data stored in the tester into the new ECU Registration.
(j) Turn the power switch OFF.
(k) Turn the power switch ON (IG).
(l) Clear the DTCs stored in the memory Reading and Clearing Diagnostic Trouble Codes.
HINT: If DTCs are not cleared at this time, past DTCs will remain.

NEXT -- Continue to next step.
3. PERFORM SENSITIVITY CHECK
(a) Perform the sensitivity check Initialization.
NEXT -- END