B1795

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

NOTICE:
* w/ Navigation System (for HDD):
After the power switch is turned off, the display and navigation module display (HDD navigation system) records various types of memory and settings. As a result, after turning the power switch off, be sure to wait for the time specified in the following table before disconnecting the cable from the negative (-) battery terminal.

Waiting Time before Disconnecting Cable from Negative (-) Battery Terminal:





* When disconnecting the cable, some systems need to be initialized after the cable is reconnected Repair Instruction - Initialization.

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 Diagnosis System

2. REPLACE FRONT SEAT SET (OCCUPANT CLASSIFICATION ECU)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch ON (IG).

(c) Using the 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 Techstream, load the previous ECU data stored in the Techstream 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