B2207
DTC B2207: Occupant Restraint Controller Internal 1DTC B2208: Occupant Restraint Controller Internal 2
DTC B2209: Occupant Restraint Controller Internal 3
DTC B220A: Occupant Restraint Controller Internal 4
DTC B220B: Occupant Restraint Controller Firing Stored Energy
DTC B220C: Occupant Restraint Controller Accelerometer 1
DTC B220D: Occupant Restraint Controller Accelerometer 2
CAUTION: If DTCs are set in the SRS-ECU, always diagnose the CAN main bus line.
TROUBLE JUDGMENT
The above DTC is set if an abnormality is detected in the circuit inside the SRS-ECU.
TROUBLESHOOTING HINTS
Malfunction of the SRS-ECU
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." Scan Tool Connecting
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: Go to Step 2.
NO: Repair the CAN bus line (Refer to Controller Area Network, Diagnosis).
STEP 2. Recheck for diagnostic trouble code.
Check again if the DTC is set.
1. Turn the ignition switch to the "ON" position.
2. Check if the DTC is set.
3. Turn the ignition switch to the "LOCK" (OFF) position.
Q: Are any "Stored" or "Active" DTCs output?
YES: Replace the SRS-ECU.
NO: There is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to general (Body and Chassis), How to Cope with Intermittent Malfunction).