Grammer MSG45/421 - Fault Overview - Identifying Potential Faults

GRAMMER repair manual for seat MSG45/421 – February 2020
Material No. 1 447 263
2.2 Fault overview – Identifying potential faults
Page 1 of 1
This Chapter contains information about faults which may occur in the seat. This information should serve to resolve the fault, with the help of Chapter 2.3 "Troubleshooting –
Locating the fault".
Faults caused by lack of maintenance or incorrect repairs are not taken into account.
Note: The relevant components are listed in Chapter 2.1 and the components to operate the functions are listed in the current seat repair manual, unless otherwise stated in the text.
Fault description
Possible cause
Eliminating the fault
The seat switch does not make contact when the seat cushion
is compressed.
 The switch bracket has come loose from the spring
assembly.
 The switch bracket is not resting on the pressure
springs.
 The pressure springs have come loose from the
bushings.
Insert the switch bracket in the spring assembly
(see Chapter 3.8).
Place the switch bracket on the pressure springs
(see Chapter 3.8).
Insert the pressure springs in the bushings
(see Chapter 3.8).
 Bellows are trapped between the seat cushion and
spring assembly.
 Seat switch lifter is defective.
 The spring sheet broken or bent.
Run your hand between the bellows and seat
cushion to release the tension. Remove/install the
seat cushion if necessary (Chap. 3.2).
Replace the seat switch with cable (see Chapter 3.8).
Replace the seat switch with cable and switch
actuation (Chap. 3.8).
Seat switch is not functioning.
 Vehicle power supply or electronics are defective.
 Plug connection (on-board power supply connector
of seat - vehicle) is defective.
 Seat switch is defective.
Check the electrical system of the vehicle.
Check the plug connection, remake if necessary.
Check the seat switch (Chap. 2.3, Test step 1.1),
completely replace the seat switch if necessary
(see Chapter 3.8).