Occupant Classification-ECU

DTC B2206: Chassis number does not match

CAUTION: If DTC B2206 is set in the occupant classification-ECU, always diagnose the CAN bus line.

TROUBLE JUDGEMENT
If the registered chassis number is different from the chassis number transmitted on the CAN bus lines, the occupant classification-ECU sets the DTC B2206.

JUDGEMENT CRITERIA
If the chassis number registered to occupant classification-ECU and the chassis number on CAN bus lines do not match, the occupant classification-ECU determines that a problem has occurred.

TROUBLESHOOTING HINTS
- Chassis number not written
- The occupant classification-ECU may be defective.
- The CAN bus line may be defective.

DIAGNOSIS

Required Special Tools:
- MB991958: Scan Tool (M.U.T.-III Sub Assembly)
- MB991824: Vehicle Communication Interface (V.C.I.)
- MB991827: M.U.T.-III USB Cable
- MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)

STEP 1. Using scan tool MB991958, diagnose the CAN bus line.







CAUTION: To 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 (M.U.T.-III)
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.

Q: Is the CAN bus line found to be normal?

YES : Accuracy check is performed. Then go to Step 2.

NO : Repair the CAN bus line.

STEP 2. Recheck for diagnostic trouble code.

Check again if the DTC is set to the occupant classification-ECU.
1. Zero calibration of occupant classification-ECU.
2. Erase the DTC.
3. Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
4. Check if DTC is set.
5. Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is the DTC set?

YES : Replace the front seat cushion frame (RH).

NO : There is an intermittent malfunction such as poor engaged connector(s) or open circuit.