Power Protection Relay: Service and Repair
WM 974619 Removing and installing cutoff relay
Technical values
Removing cutoff relay
Removing pyrotechnical cutoff relay
CAUTION
Danger of injury and material damage due to incorrect handling of cut-off relay.
-> Remove ignition key.
-> Disconnect battery.
-> Route or isolate ground strap so that all contact with a ground carrier (e.g. body, seat frame) is avoided. -> 90 Work instructions after disconnecting the battery
-> After the battery is disconnected, always wait one minute before disconnecting the cut-off relay connector.
Overview of cutoff relay
1. Move front left seat back and up as far as possible. Move backrest fully forward.
2. Disengage front trim panel at the rear -arrow A- , then unclip it by pulling it forward -arrow B-.
Unclipping trim panel for front seat frame
3. Unclip the right and left carpet cover -arrows-.
Unclipping carpet covers
4. Unscrew the two fastening screws -1-.
Loosening seat
5. Fold the seat back as far as possible -arrow A-. With the seat in its folded position, move the seat forward again using the fore/aft adjustment -arrow B-.
6. Fold carpeted floor forwards -arrow A-. Unscrew fastening nut -1- from the battery ground strap on the body and remove the ground strap from the stud -arrow B-.
Screwing off battery ground strap on body
7. Route or isolate ground strap so that all contact with a ground carrier (e.g. body, seat frame) is avoided.
Information
- Only for vehicles with auxiliary battery
8. Release the cover -arrows A- and open it -arrow B-.
Opening cover and loosening line for additional battery
9. Screw off the fastening nut -arrow 3- and remove the line for the additional battery -arrow C-.
10. Unclip the cover from the power distributor using a screwdriver -arrow a-.
Loosening cover from power distributor
11. Carefully prise out the locking mechanism on the electric connector -1- with a screwdriver -arrow a- and pull the connector out of the cutoff relay -2-.
Removing cutoff relay
12. Screw off the two fastening nuts -3- on the cutoff relay -2- and remove the cutoff relay.
Installing cutoff relay
Installing pyrotechnical cutoff relay
Information
- Use new nuts.
1. Position the cutoff relay -2- in the power distributor. Screw on the two fastening nuts -3- on the cutoff relay. => Tightening torque: 20 Nm (15 ftlb.)
Installing cutoff relay
2. Connect electric connector -1- to cutoff relay and lock it -arrow a-.
3. Slide cover of power distributor from front to back -arrow A- and press it on -arrow B- until the latch locks into place.
Installing power distributor cover
Information
- Only for vehicles with auxiliary battery
4. Attach the line for the additional battery to the threaded bolt -arrow A- and secure with the fastening nut -3-. => Tightening torque: 20 Nm (15 ftlb.)
Screwing on line for additional battery
5. Close the cover -arrow B- until the locking lugs -arrows C- engage securely.
1. Fold carpeted floor forward -arrow A- , place battery ground strap on the body -arrow B- and secure with the fastening nut -1-.=> Tightening torque: 20 Nm (15 ftlb.)
Securing ground strap to body
2. Move the seat in its folded position towards the rear -arrow A- and then tip it forward -arrow B-.
Folding seat back and screwing down
3. Tighten fastening screws -1-. => Tightening torque: 45 Nm (33 ftlb.)
4. Clip in the right and left carpet cover -arrows- until they engage securely.
Clipping in carpet covers
5. Clip in the front seat trim at the front seat frame and at the side trim panel -arrow A-.
Clipping in trim panel for front seat frame
6. Press the front seat trim down -arrow B- until the locking lugs engage securely on the seat frame.