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DTC B1C23: Passenger Seat Weight Sensor (front: LH) Configuration Mismatch
DTC B1C24: Passenger Seat Weight Sensor (front: RH) Configuration Mismatch
DTC B1C25: Passenger Seat Weight Sensor (rear: LH) Configuration Mismatch
DTC B1C26: Passenger Seat Weight Sensor (rear: RH) Configuration Mismatch
 
 
cautionIf DTC B1C23, B1C24 B1C25, B1C26 is set in the occupant classification-ECU, always diagnose the CAN main bus lines.
 
 
DTC SET CONDITIONS
The DTC is set if the weight sensor serial No. of the coding data in the occupant classification-ECU does not match the serial No. sent from the weight sensor.
 
 
TROUBLESHOOTING HINTS
  • Zero calibration not executed
 
 
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.
(1) Erase the DTC.
(2) Turn the ignition switch to the "ON" position.
(3) Check if the DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Is the DTC set?
Perform the zero calibration, and check the DTC again. If the DTC is set, replace the front seat cushion frame (RH).
There is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).