198001901 - O002 FRONT SEAT BACKREST ANGLE ADJUSTMENT NOT WORKING

Hardness during the adjustment of the backrest

		Test results
0	PRELIMINARY CHECKS	All OK	Problems encountered	Operation
	Operate the backrest adjustment knob without resting your back against the backrest and check whether the hardness persists	End of diagnosis	1. Hardness disappears2. Hardness persists	1. Explain to the customer that the adjustment should be carried out without resting their back on the backrest2. Move on to Step 1
1	COVER KNOB CHECK	All OK	Problems encountered	Operation
	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
2	CHECK ON THE SEAT	All OK	Problems encountered	Operation
	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
3	BACKREST CHECKS	All OK	Problems encountered	Operation
	De-tension 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 hardness 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
4	BACKREST ADJUSTERS CORRECT SETTING CHECK	All OK	Problems encountered	Operation
	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 rephase the adjusters
5	CORRECT OPERATION CHECK	All OK	Problems encountered	Operation
	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.