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

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. Holding the seat for a long period of time may cause a problem, such as seat rail deformation. Hold the seat only as necessary.

PROCEDURE

1. CHECK DTC

(a) Turn the engine 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 assembly Reading and Clearing Diagnostic Trouble Codes.

(d) Turn the engine switch off.

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

(f) Check the DTCs Reading and Clearing Diagnostic Trouble Codes.

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.

OK -- USE SIMULATION METHOD TO CHECK Diagnosis System
NG -- Continue to next step.

2. REPLACE OCCUPANT CLASSIFICATION ECU

(a) Connect Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Using Techstream, save the ECU data from the ECU which has been installed on the vehicle Registration.

(d) Turn the engine switch off.

(e) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.

(f) Replace the occupant classification ECU Removal.

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

(h) Turn the engine switch on (IG).

(i) Using Techstream, load the previous ECU data stored into the new ECU Registration.

(j) Turn the engine switch off.

(k) Turn the engine switch on (IG).

(l) Clear the DTCs stored in the memory Reading and Clearing Diagnostic Trouble Codes.

HINT
If DTC is not cleared at this time, past DTC will remain.

NEXT -- Continue to next step.

3. PERFORM SENSITIVITY CHECK

(a) Perform the sensitivity check Initialization.

NEXT -- END