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#1
08-01-2011, 05:59 AM
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W140 seat switch signals
There are 7 pins on the seat switch and 6 motors on the seat itself...
was wondering what the signals/pulses are FROM the switch to the seat control unit... is it a 1to1 for each motor? or is it a whole lot more complicated than that? 
__________________
 85 190E 2.3(SOLD) 86 230E (-->300D) sold 87 300D (-->300TD) sold 68 250S w/ a 615 and manual tranny (RIP) 87 300TD (SOLD) 95 S280 "The KRAKEN" (Turbo 2.9 602 transplant) traded 86 190E 2.3... current project 
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#2
08-01-2011, 09:24 AM
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That car uses a voltage drop (resistance value change) to control the seat computers.
__________________
MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator
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#3
08-02-2011, 12:38 AM
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it's not a direct +/- voltage to the motor then... would you know what voltage the microswitches can take? If I can somehow isolate them...apart from the PCB
__________________
85 190E 2.3(SOLD) 86 230E (-->300D) sold 87 300D (-->300TD) sold 68 250S w/ a 615 and manual tranny (RIP) 87 300TD (SOLD) 95 S280 "The KRAKEN" (Turbo 2.9 602 transplant) traded 86 190E 2.3... current project
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Linear Mode
