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DTC B1BBD: Occupant Classification-ECU Current Configuration table Unprogrammed
 
 
cautionIf DTC B1BBD is set in the occupant classification-ECU, always diagnose the CAN main bus lines.
 
 
DTC SET CONDITIONS
The DTC is set if the check error occurs in the coding data of the occupant classification-ECU.
 
 
TROUBLESHOOTING HINTS
  • Zero calibration not executed
  • The Occupant Classification-ECU may be defective.
 
 
DIAGNOSIS
STEP 1. Using scan tool MB991958, diagnose the CAN bus line.
cautionTo prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect the scan tool ."
(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Is the CAN bus line found to be normal?
Go to Step 2.
Repair the CAN bus line (Refer to GROUP 54C, Diagnosis ).
 
STEP 2. Recheck for diagnostic trouble code.
Check again if the DTC is set the occupant classification-ECU.
(1) Zero calibration of occupant classification -ECU
(2) Erase the DTC.
(3) Turn the ignition switch to the "ON" position.
(4) Check if the DTC is set.
(5) Turn the ignition switch to the "LOCK" (OFF) position.
Is the DTC set?
Replace the passenger seat cushion frame assembly (Refer to GROUP 52A, Front Seat Assembly ).
There is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).