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No.
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TECH 1 Display
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Conditions for
Checking
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Nominal Value
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Trouble Codes
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Terminal
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19
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RECLINER POS.
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Ignition ON
Press rocker switch for backrest forwards/ backwards
forwards and then backwards
|
13 % 0.14 V
to
94 % 4.67 V
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12
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3,
4, 5
5-pin plug
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Note:
The value displayed alters constantly within the specified
range depending on the programmed end stops. The backrest moves forwards and
backwards.
If the motor is already at one of the two end stops, the
motor will only move again (i.e. the TECH 1 display will only change
again) when the above rocker switch is pressed in the other direction.
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The potentiometer and motor M72.4 for the backrest
adjustment are connected to control unit K103 by a 5-pin plug with the
designation "backrest". The potentiometer is wired with the three
plug terminals designated (x) and the motor is wired with the two plug
terminals designated (y).
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Notes on Trouble-shooting:
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Nominal Value:
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Cause of fault:
(If nominal value is not
attained)
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· Ignition OFF, disconnect battery
negative terminal
· Remove driver's seat
· Release 5-pin plug "backrest"
and disconnect from control unit K103
· Using multimeter, measure resistance in
5-pin plug between Ter. 3 (x) and Ter. 1 (x)
|
approx. 10 kW
|
· Potentiometer for motor M72.4
"backrest" defective (resistance path interrupted)
· Lead interruption between potentiometer
for M72.4 and 5-pin plug Ter. 3 (x) and Ter. 1 (x)
· Lead short circuit between 5-pin plug
Ter. 3 (x) and Ter. 1 (x) to potentiometer for M72.4
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· Using multimeter, measure resistance in
5-pin plug between Ter. 2 (x) and Ter. 3 (x)
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between 1 kW and
10 kW, depending on
"backrest adjustment"
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· Lead interruption between 5-pin plug
Ter. 2 (x) and slider connection of potentiometer for M72.4
· Potentiometer for M72.4 defective
(slider has no contact)
· Lead short circuit between 5-pin plug
Ter. 3 (x) and Ter. 2 (x) to potentiometer for M72.4
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