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Measurement value, control module connections, seat control module (357k/Dk)

Measurement value, control module connections, seat control module (357k/Dk)

The following pages contain instructions and readings for testing the control module.

Remember:


Observe the test criteria. Use common sense when assessing the test results.

The specified test readings are with the ignition ON, unless otherwise stated.

Check these points:

- First check that the control module is supplied with current and is grounded.

- Then check all sensor inputs and signals from other systems.

- Finally, check the control module outputs. Remember that the test readings do not indicate whether the actuator is working.

If any reading is not OK, consult the wiring diagram to trace the leads, connectors or components which should be checked more thoroughly.

The test readings given apply to a calibrated Fluke 88/97.

The test readings show the signal pulse condition or pulse length. A test instrument with pulse rate or width measurement must be used.


Note

All units on the I and P-buses send signals.


64-pin connector

Number of connector pins 64





Pin Component/function In/Out Test conditions Measure across Test reading
1-3 Not connected
4 Button, backrest forward In 4-59 B+
5 Button, backrest backward In 5-59 B+
6 Not connected
7 Memory button 3 In 7-59 B+
8 Memory button 1 In 8-59 B+
9 Memory button 2 In 9-59 B+
10 Memory store button In 10-59 B+
11 Button, seat forward In 11-59 B+
12 CV: Microswitch, access handle 4D: Not connected In Activated 12-58 B+
13 CV: Microswitch, backrest 4D: Not connected In Activated (forward-folded position) 13-58 B+
14 Button, seat backward Out 14-59 B+
15 Button, tilt forward Out 15-59 B+
16 Button, rear down Out 16-59 B+
17 Button, rear up Out 17-59 B+
18 Button, tilt back Out 18-59 B+
19-26 Not connected
27 CV: Power supply microswitch, backrest 4D: Not connected Out 27-58 B+
28 CV: Power supply microswitch, access handle 4D: Not connected Out 28-58 B+
29 Power supply, hall sensor In Motor runs forward or backward 29-33 7.5-8.5V
30 Ground, hall sensor, tilt In Motor runs up or down 30-29 7.5-8.5V
31 Ground, hall sensor/backrest forward-backward In Motor runs forward or backward 31-29 7.5-8.5V
32 Ground, hall sensor/rear up-down In Motor runs up or down 32-29 7.5-8.5V
33 Ground, hall sensor/seat forward-backward In Motor runs forward or backward 33-29 7.5-8.5V
34-38 Not connected
39 I-bus In/Out Test lamp 39-58 Test lamp should flash*
40-53 Not connected
54 Motor, backrest In/Out 54-55 3.8V
55 Motor, backrest In/Out 55-58 3.8V
56 Not connected
57 Motor, tilt In/Out 57-58 3.5V
58 Ground In 58-59 B+
59 +30 voltage In 59-58 B+
60 Motor, group 1 In/Out 60-58 3.5V
61 Not connected
62 Motor, rear height adjustment In/Out 62-58 3.5V
63 CV: Motor, access 4D: Not connected In/Out 63-58 3.5V
64 Motor, legroom adjustment In/Out 64-58 3.5V


*All control modules send a voltage