Seat Belt: Service and Repair
SEAT BELTS WITH PRE-TENSIONERPre-Removal Operation:
Removal Steps 1-7:
WARNING:
- Never attempt to disassemble or repair the seat belt pre-tensioner. If faulty, replace it.
- Be extremely careful when handling the seat belt with pre-tensioner. Do not subject it to shocks, drop it, bring it close to strong magnets or allow contact with water, grease or oil. Always replace it with a new part if any dents, cracks or deformation is found.
- Do not place anything on the seat belt pre-tensioner.
- Do not expose the seat belt pre-tensioner to temperatures over 90 degrees C (194 degrees F).
- After operating the seat belt pre-tensioner, replace the seat belt pre-tensioner with a new part.
- Gloves and protective goggles must be worn when handling a seat belt pre-tensioner once it has been used.
- If disposing of a seat belt with pre-tensioner which has not yet been operated, its seat belt pre-tensioner must be operated first before disposal.
- When removing and installing the front passenger seat, be sure to carry out accuracy check occupant classification sensor after the seat has been installed in the vehicle. (On-vehicle Service)
Required Special Tools:
- MB991958: Scan Tool (M.U.T.-III Sub Assembly)
- MB991824: V.C.I.
- MB991827: M.U.T.-III USB Cable
- MB991911: M.U.T.-III Main Harness B
REMOVAL SERVICE POINTS
[[A]]NEGATIVE (-) BATTERY CABLE DISCONNECTION
DANGER: Wait at least 60 seconds after disconnecting the battery cable before doing any further work.
WARNING: Battery posts, terminals and related accessories contain lead and lead compounds. WASH HANDS AFTER HANDLING.
Disconnect the negative (-) battery cable from the battery and tape the terminal to prevent accidental connection and seat belt pre-tensioner operation.
[[B]]PRE-TENSIONER CONNECTOR DISCONNECTION
1. Use a flat-tipped screwdriver to unlock the locking button of the harness-side connector by with drawing it toward you in two stages.
2. Disconnect the pretensioner connector.
INSTALLATION SERVICE POINTS
]]A[[PRE-INSTALLATION Inspection
WARNING: Dispose of seat belt pre-tensioner only according to the specified procedure.
1. When installing the new seat belt pre-tensioner, refer to "INSPECTION".
2. Connect the negative (-) battery cable.
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.
3. Connect scan tool MB991958 to the data link connector.
4. Turn the ignition switch to the "ON" position.
5. Check DTCs using scan tool MB991958 to ensure entire SRS operates properly. Confirm that no DTCs other than 26 and 28 are set.
DANGER: Wait at least 60 seconds after disconnecting the battery cable before doing any further work.
WARNING: Battery posts, terminals and related accessories contain lead and lead compounds. WASH HANDS AFTER HANDLING.
6. Turn the ignition switch to the "LOCK" (OFF) position. Disconnect the negative (-) battery cable and tape the terminal to prevent accidental connection and seat belt pre-tensioner operation.
]]B[[PRE-TENSIONER CONNECTOR CONNECTION
Connect the pretensioner connector, then securely lock the locking button of the harness-side connector.
]]C[[POST-INSTALLATION Inspection
1. Reconnect the negative (-) battery cable.
2. Turn the ignition switch to the "ON" position.
3. Does the "SRS" warning light illuminate for approximately seven seconds, and go out?
4. If yes, the SRS system is functioning properly. If no, Refer to "Displaying & Reading Trouble Codes".