Test results

Operate the backrest adjustment knob without resting your back against the backrest and check whether the hardness persists

End of diagnosis

1. Hardness disappears

2. Hardness persists

1. Explain to the customer that the adjustment should be carried out without resting their back on the backrest

2. Move on to Step 1

Check for interference with the cover (knob on cover)

Move on to Step 2

Presence of interference at the knob on the cover

Remove the interference and check that the regulator is working properly

Remove the seat from the vehicle, remove the side housings (left and right), release the joints and check for the presence of paint lumps and/or machining residues

 Op. 7045A10 FRONT SEAT (ONE), LEFT OR RIGHT - R.R.

Move on to Step 3

Presence of paint lumps and/or machining residues

Eliminate the foreign bodies, lubricate and run in with at least five complete operating cycles

Detension the backrest by loosening (first on one side and then on the other) the four M8 bolts joining the backrest to the cushion module and operate the backrest adjustment checking whether the hardening persists

Move on to Step 4

Hardness disappears

Fit a spacer washer between the backrest adjustment bracket and the side of the cushion, then tighten the bolts to the correct torque

Check that the setting of the backrest adjusters is correct by moving the backrest

Move on to Step 4

The backrest moves with a sinusoidal motion

Partly release the joint connecting rod (removing the washer fitted on the rod) and reset the adjusters

Check that the fault is no longer present

End of diagnosis

The fault persists

Replace the backrest assembly

 Op. 7045A18 FRONT SEAT BACKREST ASSEMBLY (ONE), LEFT OR RIGHT - R.R.