B1547
DTC B1547: Passenger's Front Air Bag Cut Off SystemDTC SET CONDITIONS
This DTC is set if the following conditions are detected:
- Malfunction of occupant classification-ECU system
- Malfunction of front passenger's seat belt switch system
- Malfunction of front passenger's air bag module system
- Malfunction of SRS-ECU system
TROUBLESHOOTING HINTS
Malfunction of SRS-ECU
DIAGNOSIS
Required Special Tools:
- MB991958: Scan Tool (MUT-III Sub Assembly)
- MB991824: Vehicle Communication Interface (V.C.I.)
- MB991827: MUT-III USB Cable
- MB991910: MUT-III Main Harness A (Vehicles with CAN communication)
STEP 1. 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.
Q: Is the DTC set?
YES: Go to Step 2.
NO: There is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to How to Cope with Intermittent Malfunction).
STEP 2. Using scan tool MB991958, read the diagnostic trouble code.
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.
Check that the DTC except B1547 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 "LOOK (OFF)" position.
Q: Is the DTC set?
YES: Carry out the troubleshooting according to a set DTC. Diagnostic Trouble Code Descriptions
NO: Go to Step 3.
STEP 3. 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.
Q: Is DTC B1547 set?
YES: Replace the SRS-ECU.
NO: The procedure is complete.