Replacing Occupant Detection Control Unit
- Triggering of airbag unit.
- System faults can occur.
→ Switch off ignition and remove ignition key or remote control (hand-held transmitter).
→ A voltage supply (e.g. battery charger) must not be connected to the external power supply/jump-lead starting terminals.
→ Disconnect the battery and insulate the ground strap so that all contact with a ground carrier is avoided.
→ Wait 1 minute after disconnecting the battery.
→ Only pull off connector on the triggering unit after the waiting time has elapsed.
→ Make sure that no foreign objects are located in front of the airbag unit during installation.
→ Replace damaged parts during removal.
→ Always position airbag units so that the blow-out opening is facing upwards, e.g. crest on driver's airbag.
→ Do not place any objects on the airbag units.
→ If removed for an extended period, the airbag units must be stored in a safe place.
→ Airbag units must not come into contact with grease, oil, detergents, liquids or similar substances.
→ Do not expose airbag units to temperatures above 90°.
→ Do not remove the short-circuit spring on the plug contacts.
→ Triggering and preparations may only be carried out by skilled staff, supervised by a second responsible person.
→ Before disposal, the airbag unit must be rendered harmless by triggering it electrically while observing all precautionary measures, thereby preventing it from being used incorrectly.
- Irreparable damage to control unit
- Damage to control unit
- Fault entries in the control unit
- Control unit programming/coding is aborted
- Malfunctions in the control unit, even during programming/coding
→ Switch off ignition before disconnecting the control unit.
→ Make sure that the power supply is not interrupted during programming/coding.
→ Connect the battery charger with at least > current 90 A to the vehicle battery.
Information
The PIWIS Tester instructions take precedence since the description may be different with later Tester releases.
The procedure described here has been structured in general terms. Different text or additional information may appear on the PIWIS Tester.
Information
If components of the seat occupancy detection system (only on vehicles for C02 - USA and C36 - Canada) must be replaced, the padding with affixed mat for the seat occupancy detection system -1- and the seat occupancy detection control unit -2- must always be replaced as a complete unit since they are paired during manufacture.
Spare parts are grouped in a repair kit.
Content seat occupancy detection repair kit
-1- Padding with affixed mat for seat occupancy detection system
-2- Seat occupancy detection control unit
A mixed installation is not permitted.
Do notdetach the mat for the seat occupancy detection system from the foam part.
- Switch off ignition. Disconnect charger from the power connection. Disconnect the battery.
- Wait for 1 minute before replacing the occupant detection control unit.
> 696819 REMOVING AND INSTALLING OCCUPANT DETECTION CONTROL UNIT
- Connect the Tester to the vehicle and start it. Switch on ignition.
- Select the vehicle type if required.
- Select Airbag control unit in the overview . Press F12 to continue. The message "Create Vehicle Analysis Log (VAL)?" appears. Press F11 to continue.
- Maintenance/repairs must now be selected.
- Teach seat occupancy detection must now be selected. Press F12 to continue.
- Read the warnings and instructions displayed on the Tester. Press F12 to continue and then press F8 to start.
- Execute seat occupancy detection in accordance with menu guidance. Press F12 to continue.
- Read out fault memory and erase it if necessary.
- Switch ignition off and then on again. Check that the airbag warning light in the instrument cluster comes on and then goes off again after a few seconds.
- Carry out work instruction after disconnecting the battery.