- Volvo 780 has four Sleeper Airbags.
- The airbags system should be disarmed before starting any work on the
system.
- Never put any objects below the seat during the work
- Be sure to properly handle the Sleeper Airbag unit because an
incorrect handling can cause inflation of the airbag unit.
Replacement - Driver's Side:
1. Press the seat belt buckle until the "click" is heard. Place your left
hand (palm down) under the seat cushion (approx. center). Place
your right hand under the bottom of the front of the seat cushion.
Lift up the front of the seat cushion and turn the buckle outward.
Lift up the seat cushion a little more and unhook the front hooks
and lift out the seat cushion.
2. Disconnect the electrical connector from the Sleeper Airbag unit
by carefully prying it loose.
3. To remove the Sleeper Airbag unit, turn the front of the unit down
and pull the unit straight out from the seat. Lift the unit from the
rear and put it aside carefully.
4. Remove the 10 mm nut and 8 mm bolt holding the Sleeper Airbag unit
holder to the seat. To remove the Sleeper Airbag unit holder press
the locking tag (located on the driver's side, near the rear mounting)
with a thin flat tipped tool and pull the holder out.
5. Install a new Sleeper Airbag unit holder and secure it using a new
10 mm nut and 8 mm bolt.
6. Install a new Sleeper Airbag unit by turning the front of the airbag
unit down and putting the bottom side of the airbag toward the seat.
Place the airbag unit in the seat and guide the mounting bracket
locks. Carefully turn the airbag up and secure it to the mounting
holder using the 8mm flat headed metric bolts.
7. Connect the electrical connector to the Sleeper Airbag unit.
8. Re-install the seat cushion by aligning and reinstalling the spring
hooks into the seat frame, and then dropping it into place. Press
down on the front edge of the seat cushion until it securely
engages with the seat cushion retainer at the front of the seat.
9. Turn on the ignition. The Sleepers should inflate.
Replacement - Passenger's Side:
1. Disconnect the battery ground terminal cable.
2. Remove the center console.
3. Remove the 4 Phillips head screws that secure the Sleeper Airbag
cover.
4. Disconnect the electrical connector, located next to the Sleeper
Airbag unit, by carefully prying it loose with a small screwdriver.
5. Remove the six 10mm bolts securing the Sleeper Airbag unit to the
seat and remove it carefully from the seat. (Note: Lift up the front
of the unit so that the rear brackets can be removed from the
support bar).
6. Reinstall the new Sleeper Airbag unit onto the seat. Tighten the
six 10mm bolts (37-55 in. lb).
7. Reconnected the electrical connector. Replace and tighten the four
screws that secure the Sleeper Airbag cover to the seat.
8. Reinstall the center console. Reconnect the battery ground
terminal cable.
9. Turn on the ignition. The Sleepers should inflate.
Airbag Warning Lamp
If the "AIRBAG" warning lamp remains illuminated (with the
ignition ON) there is a malfunction in the Supplementary Restraint
System. The "AIRBAG" warning lamp should light up at
ignition ON and go out after 4 to 6 seconds. If the "AIRBAG"
warning lamp does not light up at all or still lights up after 6
seconds, the ignition should be switched OFF and a qualified
specialist called in to check and rectify the fault.
