Measurement value, control module connections, seat control module (357k/Dk)
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Measurement value, control module connections, seat control module (357k/Dk)
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The following pages contain instructions and readings for testing the control module.
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Observe the test criteria. Use common sense when assessing the test results.
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The specified test readings are with the ignition ON, unless otherwise stated.
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First check that the control module is supplied with current and is grounded.
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Then check all sensor inputs and signals from other systems.
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Finally, check the control module outputs. Remember that the test readings do not indicate whether the actuator is working.
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If any reading is not OK, consult the wiring diagram to trace the leads, connectors or components which should be checked more thoroughly.
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The test readings given apply to a calibrated Fluke 88/97.
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The test readings show the signal pulse condition or pulse length. A test instrument with pulse rate or width measurement must be used.
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Note
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All units on the I and P-buses send signals.
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Number of connector pins
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64
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Pin
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Component/function
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In/Out
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Test conditions
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Measure across
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Test reading
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1-3
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Not connected
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4
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Button, backrest forward
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In
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4-59
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B+
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5
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Button, backrest backward
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In
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5-59
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B+
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6
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Not connected
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7
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Memory button 3
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In
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7-59
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B+
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8
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Memory button 1
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In
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8-59
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B+
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9
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Memory button 2
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In
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9-59
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B+
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10
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Memory store button
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In
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10-59
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B+
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11
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Button, seat forward
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In
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11-59
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B+
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12
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CV:
Microswitch, access handle
4D:
Not connected
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In
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Activated
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12-58
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B+
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13
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CV:
Microswitch, backrest
4D:
Not connected
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In
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Activated (forward-folded position)
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13-58
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B+
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14
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Button, seat backward
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Out
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14-59
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B+
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15
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Button, tilt forward
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Out
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15-59
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B+
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16
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Button, rear down
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Out
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16-59
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B+
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17
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Button, rear up
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Out
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17-59
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B+
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18
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Button, tilt back
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Out
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18-59
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B+
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19-26
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Not connected
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27
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CV:
Power supply microswitch, backrest
4D:
Not connected
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Out
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27-58
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B+
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28
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CV:
Power supply microswitch, access handle
4D:
Not connected
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Out
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28-58
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B+
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29
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Power supply, hall sensor
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In
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Motor runs forward or backward
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29-33
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7.5-8.5V
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30
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Ground, hall sensor, tilt
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In
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Motor runs up or down
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30-29
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7.5-8.5V
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31
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Ground, hall sensor/backrest forward-backward
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In
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Motor runs forward or backward
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31-29
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7.5-8.5V
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32
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Ground, hall sensor/rear up-down
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In
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Motor runs up or down
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32-29
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7.5-8.5V
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33
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Ground, hall sensor/seat forward-backward
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In
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Motor runs forward or backward
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33-29
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7.5-8.5V
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34-38
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Not connected
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39
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I-bus
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In/Out
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Test lamp
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39-58
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Test lamp should flash*
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40-53
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Not connected
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54
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Motor, backrest
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In/Out
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54-55
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3.8V
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55
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Motor, backrest
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In/Out
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55-58
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3.8V
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56
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Not connected
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57
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Motor, tilt
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In/Out
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57-58
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3.5V
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58
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Ground
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In
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58-59
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B+
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59
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+30 voltage
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In
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59-58
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B+
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60
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Motor, group 1
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In/Out
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60-58
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3.5V
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61
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Not connected
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62
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Motor, rear height adjustment
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In/Out
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62-58
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3.5V
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63
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CV:
Motor, access
4D:
Not connected
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In/Out
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63-58
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3.5V
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64
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Motor, legroom adjustment
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In/Out
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64-58
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3.5V
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*All control modules send a voltage
