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20.3d ... and disconnect the airbag wiring plug

• Disconnect the airbag control unit wiring plug prior to using arc-welding equipment on the vehicle.

20.8a Disconnect the contact unit wiring plug (arrowed)...

20.8b ... then undo the contact unit retaining screws (arrowed)

Refitting

4 Reconnect the airbag wiring plug, and position the airbag on the steering wheel.

5 Tighten the airbag retaining screws.

6 Make sure that no-one is inside the car, then reconnect the battery negative lead.

Driver's airbag contact reel Removal

7 Remove the airbag unit as described above, and the steering wheel and column shrouds as described in Chapter 10.

8 Taking care not to rotate the contact unit, undo the four retaining screws and remove it from the steering column switch assembly. Disconnect the wiring plug (see illustrations). Refitting

9 If a new contact unit is being fitted, cut the cable-tie which is fitted to prevent the unit accidentally rotating.

10 A new reel should be supplied in the centralised position - if not, or there is a chance the unit is not centralised, proceed as follows. Turn the reel gently clockwise as far as it will go, then turn it back anti-clockwise two turns. The arrow marks on the contact unit should align (see illustration).

11 Fit the unit to the steering column switch assembly and securely tighten its retaining screws.

12 Refit the steering wheel as described in chapter 10, and the airbag unit as described above.

Passenger's airbag Removal

13 Disconnect the battery negative lead (See chapter 5A), and wait 5 minutes before proceeding.

20.10 When centralised, the arrows on the 20.15 Undo the centre bracket screw and 20.16 Undo the three nuts and two bolts, contact unit should align (arrowed) air duct screws (arrowed) then remove the passenger's airbag

14 Remove the complete facia as described in Chapter 11.

15 Undo the retaining screw, remove the centre bracket, then undo the two screws and unclip and remove the air vent duct from the underside of the facia (see illustration).

16 Undo the three retaining nuts and two bolts, then remove the airbag from the facia (see illustration).

Refitting

17 Refitting is a reversal of removal

18 On completion, make sure that no-one is inside the car, then reconnect the battery negative lead.

Airbag control module Removal

19 Disconnect the battery negative lead as described in Chapter 5A. Wait at least 5 minutes before proceeding, to allow any residual electrical energy to dissipate.

20 Remove the engine management ECM as described in Chapter 4A.

21 Unclip the carpet each side, then undo the 3 screws and remove the module to the passenger's side (see illustration). Note that, on some models, it may be necessary to unbolt the wiring loom support bracket from the left-hand side of the module in order to remove it.

22 Depress the retaining clips and disconnect the module wiring plugs (see illustration).

Refitting

23 Refitting is a reversal of removal, ensuring the module is fitted with the arrow on its top surface facing forwards.

24 On completion, make sure that no-one is inside the car, then reconnect the battery negative lead.

Side airbags

25 The side airbag units are built into the front seats, and their removal requires that the seat fabric be removed. This is not considered to be a DIY operation, and should be referred to a Toyota dealer or upholstery specialist.

Side crash sensors Removal

26 Disconnect the battery negative lead as described in Chapter 5A. Wait at least 5 minutes before proceeding, to allow any residual electrical energy to dissipate.

27 The side crash sensors are fitted to vehicles B-pillar (between the driver's and passenger's doors) only on models equipped with side airbags.

28 Remove the front seat belt inertia reel units as described in Chapter 11.

29 Release the clip and disconnect the wiring plug from the sensor.

30 Undo the four retaining Torx screws and remove the sensor.

Refitting

31 Refit the sensor(s) to the pillar(s) and tighten the retaining screws to the specified torque. Reconnect the wiring plug.

32 The remainder of refitting is a reversal of removal.

33 On completion, make sure that no-one is inside the car, then reconnect the battery negative lead.

Front crash sensors

34 Disconnect the battery negative lead as described in Chapter 5A. Wait at least 5 minutes before proceeding, to allow any residual electrical energy to dissipate. Left-hand sensor

35 Jack up the front of the vehicle and support it securely on axle stands (see Jacking and vehicle support).

36 Release the fasteners and remove the left-hand engine undershield.

37 Disconnect the sensor wiring plug, and undo the two bolts and remove the sensor (see illustration).

Right-hand sensor

38 Remove the right-hand headlight as described in Section 9.

39 Reach through the headlight aperture, disconnect the sensor wiring plug, then undo the two nuts and remove the sensor (see illustration).

Both sensors

40 Refitting is a reversal of removal, tightening the retaining bolts/nuts to the specified torque.

41 On completion, make sure that no-one is inside the car, then reconnect the battery negative lead.

retaining screws (two left-hand ones (arrowed - shown with the battery 20.39 Right-hand front crash sensor arrowed) removed for clarity) (arrowed)

retaining screws (two left-hand ones (arrowed - shown with the battery 20.39 Right-hand front crash sensor arrowed) removed for clarity) (arrowed)

HOW TO READ THIS SECTION --r ine System shown here is an EXAMPLE ONLY. It is different to the actual circuit shown in the wiring diagram section.

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