939004792 - O005 FRONT SEAT HEIGHT ADJUSTMENT NOT WORKING

The backrest electrical adjustment is not working / not working properly.
1CHECK ON SWITCH STATUSALL OKPROBLEMS ENCOUNTEREDACTION
Select the following control unit at the diagnostic equipment:Driver''s/passenger seat control unit.Check the value of the following parameter:Seat lifiting switch and check that it indicates released when the switch is released and indicates pressed when the switch is pressed.Move on to Step 5There is no change in the status of the switch.Move on to Step 2
2CHECK ON WIRING CONNECTIONS AT SEAT LIFTING SWITCHALL OKPROBLEMS ENCOUNTEREDACTION
Check the connection for the wiring at the electric seat control switch.Also check for any oxidation/impurities at the connector/switch.Move on to Step 31.Switch wiring connector detached or badly positioned on seat mounting.1.Fit connector correctly on switch.
2. Presence of oxidation/impurities at connector/control unit.2.Eliminate oxidation/impurities at connector/switch.
3CHECK ON WIRING CONNECTIONS AT CONTROL UNITALL OKPROBLEMS ENCOUNTEREDACTION
Check the connection for the wiring at the electric seat control unit.Also check for any oxidation/impurities at the connector/control unit.Move on to Step 41.Switch wiring connector detached or badly positioned on seat control unit.1.Fit connector correctly on control unit
2. Presence of oxidation/impurities at connector/control unit2.Eliminate oxidation/impurities at connector/control unit.
4SEAT LIFTING SWITCH OPERATION CHECKALL OKPROBLEMS ENCOUNTEREDACTION
Check that the seat lifting switch is working properlyMove on to Step 9Seat lifiting switch not working correctly.Replace the switchOp. 7045J50
5CHECKS USING DIAGNOSTIC EQUIPMENTALL OKPROBLEMS ENCOUNTEREDACTION
Keeping the diagnostic equipment connected, check:that the backrest actuator is working properly through active diagnosis.Move on to Step 9Seat lifiting actuator not working correctly.Move on to Step 6
6CHECK ON CONNECTION AT MOTORALL OKPROBLEMS ENCOUNTEREDACTION
Check that the connection is correctly attached to the motorAlso check for any oxidation/impurities at the connector/motor.Move on to Step 71.Connectors at motor detached or badly positioned.1.Fit connector correctly on motor
2.Presence of oxidation/impurities at connector/motor.2.Eliminate oxidation/impurities at connector/motor.
7CHECK ON ELECTRICAL SEAT WIRINGALL OKPROBLEMS ENCOUNTEREDACTION
Check the condition of the electric seat wiringMove on to Step 8Presence of cuts/tears to seat wiring.Replace cut/broken wiring see wiring diagram    See E3076 ELECTRICALLY-ADJUSTABLE SEATS
8CHECK ON SEAT LIFITING ADJUSTMENT MOTORALL OKPROBLEMS ENCOUNTEREDACTION
Check that the seat lifting movement motor is working properly.Move on to Step 9Seat lifting motor not working correctly.Replace the backrest adjustment motor    Op. 7045J30 FRONT SEAT LIFTING MOTOR, LEFT OR RIGHT - R.R. FOLLOWING ELECTRICAL WIRING CHECK
9DRIVER''S/PASSENGER SEAT CONTROL UNITALL OKPROBLEMS ENCOUNTEREDACTION
Replace the driver''s/passenger seat control unit    Op. 7045J36 SEAT MOVEMENT ECU R R FOLLOWING ELECTRICAL CIRCUIT CHECK End of diagnosisThe fault persistsContact technical service for further information on the problem.
Seat lifiting lever loose, detached/slipping
1CHECK CONDITION OF LEVER ATTACHMENT SYSTEMALL OKPROBLEMS ENCOUNTEREDACTION
Check the condition of the lever attachment system.Move on to Step 21.Lever and/or ratchet retaining elements broken.1. Replace the lever    Op. 7045A56 DRIVER'S SEAT HEIGHT ADJUSTMENT DEVICE CONTROL LEVER - R.R
2. Lever fixing bolt slack/thread stripped2. Replace the bolt.
2CHECK ON CONDITION OF RATCHET ATTACHMENT SYSTEMALL OKPROBLEMS ENCOUNTEREDACTION
Check the condition of the seat lifting ratchet attachment system.Move on to Step 3Ratchet loose (fastening elements to seat frame).Retighten the ratchet to the frame correctly.
3CHECK ON CORRECT OPERATIONALL OKPROBLEMS ENCOUNTEREDACTION
Check that the fault is no longer present.End of diagnosisThe fault persistsReplace the seat lifting ratchet    Op. 7045A36 DRIVER'S SEAT MANUAL HEIGHT ADJUSTMENT DEVICE - R.R