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No.
|
TECH 1 Display
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Conditions for
Checking
|
Nominal Value
|
Trouble Codes
|
Terminal
|
|
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14
|
REAR HEIGHT MO.
|
Ignition ON
|
|
17
|
1,
2
|
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|
|
|
Rocker switch for rear height not actuated
|
INACTIVE
|
|
5-pin
plug
|
|
|
|
|
Rocker switch for rear height pressed downwards
|
DOWN
|
|
|
|
|
|
|
Rocker switch for rear height pressed upwards
|
UP
|
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|
|
|
Note:
The rear part of the seat moves down or up when the rocker
switch is actuated.
If the motor has already moved to one of its 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 M72.2 for the seat rear height
are connected to control unit K103 by a 5-pin plug with the designation
"rear height". The potentiometer is wired with the three plug
terminals designated (x) and the motor is wired with the two plug terminals
designated (y).
|
|
Notes on Trouble-shooting:
|
Nominal Value:
|
Cause of fault:
(If nominal value is not
attained)
|
|
· Ignition OFF, disconnect battery
negative terminal
· Remove driver's seat
· Release 5-pin plug "rear
height" and disconnect from control unit K103
· Using multimeter, measure resistance in
5-pin plug between Ter. 1 (y) and Ter. 2 (y)
|
higher than 2 W
|
· Interruption in lead between 5-pin plug
and motor M72.2
· Lead short circuit between motor M72.2
and 5-pin plug/ Ter. 1 (y) and Ter. 2 (y)
|
|
|
· Using multimeter, measure resistance in
5-pin plug between Ter. 2 (y) and ground
|
higher than 200 kW
|
· Short circuit to ground
|
|
|
· Using multimeter, measure resistance in
5-pin plug between Ter. 2 (y) and Ter. 1 (x), Ter. 2 (x) and
Ter. 3 (x)
|
higher than 200 kW
|
· Motor lead has short circuit with
potentiometer lead
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