B1BA3
DTC B1BA3: Driver's Seat Slide Sensor Malfunction (Occupant Classification-ECU)
CAUTION:
If DTC B1BA3 is set in the Occupant classification-ECU, always diagnose the CAN main bus line.
DTC SET CONDITIONS
These DTCs are set if communication between the occupant classification-ECU and the seat slide sensor is not possible or communication is faulty.
TROUBLESHOOTING HINTS
- Malfunction of the seat slide sensor
- Malfunction of occupant classification-ECU
- Malfunction of 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.
(1)
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.
Connect scan tool MB991958. Refer to "How to connect the scan tool Reading and Clearing Diagnostic Trouble Codes."
(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 CAN Bus Diagnostics Chart).
STEP 2. Using scan tool MB991958, read the occupant classification-ECU diagnostic trouble code.
Check if the DTC is set to the occupant classification-ECU.
Q. Is DTC set?
YES Diagnose the occupant classification-ECU. Then go to Step 3.
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 the DTC set?
YES Replace the SRS-ECU (Refer to Service and Repair).
NO There is an intermittent malfunction such as poor engaged connector(s) or open circuit How to Cope With Intermittent Malfunctions).