Up to 08/2009
SUPPLEMENTAL RESTRAINT SYSTEMS: OCCUPANT CLASSIFICATION SYSTEM: B1796: Sleep Operation Failure of Occupant Classification ECU
B1796 - Sleep Operation Failure of Occupant Classification ECU
DESCRIPTION
In sleep mode, the occupant classification ECU reads the condition of each sensor while the engine switch is off.
In this mode, if occupant classification ECU detects an internal malfunction, DTC B1796 is stored.
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 B1796 is output, perform troubleshooting for the DTC.
INSPECTION PROCEDURE
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 DTC Check / Clear.
(d) Turn the engine switch off, and wait for at least 10 seconds.
(e) Turn the engine switch on (IG).
(f) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.
OK:
DTC B1796 is not output.
HINT
Codes other than DTC B1796 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 How To Proceed With Troubleshooting
2. REPLACE OCCUPANT CLASSIFICATION ECU
(a) Turn the engine switch off.
(b) Disconnect the cable from the negative (-) battery terminal.
(c) Replace the occupant classification ECU Removal.
NEXT -- Continue to next step.
3. PERFORM ZERO POINT CALIBRATION
(a) Connect the cable to the negative (-) battery terminal.
(b) Connect the Techstream to the DLC3.
(c) Turn the engine switch on (IG).
(d) Using the Techstream, perform 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 Sensitivity Check Programming and Relearning.
Standard:
27 to 33 kg (59.5 to 72.8 lb)
NEXT -- END