
2 Removing and fitting housing cover
2–28 Section 2 © Siemens VDO Trading GmbH TU00-1318-0200302
2.8.7 Checking DC motor
Procedure
Visually check the DC motor.
Check that the motor pinion is running (8) freely.
Connect a measuring device between wires (6) and (7).
Turn the motor pinion (8) steadily to determine the resistance value.
2.8.8 Removing and installing DC motor
Fig. 2-23 Checking, removing and installing DC motor
Procedure
Undo the filister head screws (11) and pull the motor (10) out.
Insert a replacement motor and run wires (6) and (7) as shown in Abb. 2-22.
The collar (9) enables the motor to be centred precisely.
Screw the filister head screws (11) on.
Note
Defective DC motor:
Resistance value changes abruptly when turning
on the motor pinion (8).
Action to be taken:
Replace the DC motor.
Note
The measured value on the wires must not exceed 50 Ω ± 12%.
6 Wire 10 Motor
7 Wire 11 Filister head screws
9
Collar
10
6 7
11
a
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