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No.
|
TECH 1 Display
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Conditions for
Checking
|
Nominal Value
|
Trouble Codes
|
Terminal
|
|
|
15
|
FOR/ BACKW.SWITCH
|
Ignition ON
|
|
21
|
3,
6, 4
5-pin
plug
|
|
|
|
|
Rocker switch for longitude, forwards/ backwards not
actuated
|
INACTIVE
|
|
|
|
|
|
|
Rocker switch for longitude, forwards/ backwards pressed
forwards
|
FORWARD
|
|
|
|
|
|
|
Rocker switch for longitude, forwards/ backwards pressed
backwards
|
BACK
|
|
|
|
|
|
|
Note:
The rocker switch for longitude forwards/ backwards is the
centre part of the first switch from the front of the seat.
If the corresponding motor circuit is also okay, the seat
moves forwards or backwards.
If the motor has already moved to one of its end stops, the
motor will only move again when the above rocker switch is pressed in the
other direction.
|
|
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|
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If the nominal values for the rocker switch are attained
but the seat motor does not respond, carry out test step 7.
The rocker switches for seat adjustment (S40) are connected
to control unit K103 by a 9-pin plug.
The rocker switch for longitude forwards (S40.7), is wired
between Ter. 3 (blue) and Ter. 1 (black) in the 9-pin plug
The rocker switch for longitude backwards (S40.8), is wired
between Ter. 3 (blue) and Ter. 1 (blue) in the 9-pin plug
|
|
Notes on Trouble-shooting:
|
Nominal Value:
|
Cause of fault:
(If nominal value is not
attained)
|
|
· Check whether rocker switch for
longitude forwards/ backwards jams
|
Switch can move forwards and backwards
|
· Rocker switch or seat panelling
mechanically faulty
|
|
|
· Ignition OFF, disconnect battery
negative terminal
· Remove driver's seat
|
|
· S40.7 defective (switch contact does
not open)
· Lead short circuit between S40.7 and
9-pin plug Ter. 3 (blue) and Ter. 1 (black)
|
|
|
· Release 9-pin plug and disconnect from
control unit K103
· Using multimeter, measure resistance in
9-pin plug between Ter. 3 (blue) and Ter. 1 (black).
Rocker
switch for longitude forwards (S40.7) not actuated
|
higher than 200 kW
|
|
|
|
· Using multimeter, measure resistance in
9-pin plug between Ter. 3 (blue) and Ter. 1 (black). Press rocker
switch for longitude forwards (S40.7) forwards:
|
lower than 2 W
|
· S40.7 defective (switch contact does
not close)
· Lead interruption between S40.7 and
9-pin plug Ter. 3 (blue) and Ter. 1 (black)
|
|
|
· Using multimeter, measure resistance in
9-pin plug between Ter. 3 (blue) and Ter. 1 (blue). Rocker switch
for longitude backwards (S40.8) not actuated:
|
higher than 200 kW
|
· S40.8 defective (switch contact does
not open)
· Lead short circuit between S40.8 and
9-pin plug Ter. 3 (blue) and Ter. 1 (blue)
|
|
|
· Using multimeter, measure resistance in
9-pin plug between Ter. 3 (blue) and Ter. 1 (blue). Press rocker
switch for longitude backwards (S40.8) backwards:
|
lower than 2 W
|
· S40.8 defective (switch contact does
not close)
· Lead interruption between S40.8 and
9-pin plug Ter. 3 (blue) and Ter. 1 (blue)
|
|
|
· Using multimeter, measure resistance in
9-pin plug between
Ter. 1
(blue) and ground (seat console)
Ter. 3
(blue) and ground (seat console)
Ter. 1
(black) and ground (seat console)
|
higher than 200 kW
higher than 200 kW
higher than 200 kW
|
· Short circuit to ground in lead
connection between 9-pin plug and S40.7/ S40.8
|
|
|
Further possible faults
|
|
· Control unit K103
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