B1796

SUPPLEMENTAL RESTRAINT SYSTEM: OCCUPANT CLASSIFICATION SYSTEM: B1796: Sleep Operation Failure of Occupant Classification ECU

DTC B1796 - Sleep Operation Failure of Occupant Classification ECU

DESCRIPTION

During sleep mode, the occupant classification ECU reads the condition of each sensor while the power switch is OFF.
In this mode, if the occupant classification ECU detects an internal malfunction, DTC B1796 is output.






INSPECTION PROCEDURE

PROCEDURE

1. CHECK FOR DTC
(a) Turn the power switch ON (IG).
(b) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.
HINT: First clear DTCs stored in the occupant classification ECU and then in the center airbag sensor.
(c) Turn the power switch OFF, and wait for at least 2 seconds.
(d) Turn the power switch ON (IG).
(e) Check the DTCs Reading and Clearing Diagnostic Trouble Codes.
OK:
DTC B1796 is not output.
HINT: DTCs other than DTC B1796 may be output at this time, but they are not related to this check.

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

2. REPLACE OCCUPANT CLASSIFICATION ECU
(a) Turn the power switch OFF.
(b) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
(c) Replace the occupant classification ECU.
NEXT -- Continue to next step.

3. PERFORM ZERO POINT CALIBRATION
(a) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
(b) Connect the Techstream to the DLC3.
(c) Turn the power switch ON (IG).
(d) Using the Techstream, perform the zero point calibration Programming and Relearning.
OK:
"Zero Point Calibration is complete." is displayed.
NEXT -- Continue to next step.

4. PERFORM SENSITIVITY CHECK
(a) Using the Techstream, perform the sensitivity check Programming and Relearning.
Standard value:
27 to 33 kg (59.52 to 72.75 lb)
NEXT -- END