Need Ohm readings for passenger front seat occupancy sensor
#1
Newbie
Thread Starter
Join Date: Jun 2012
Location: Florida, Palm City
Posts: 13
Likes: 0
Received 2 Likes
on
2 Posts
MB S350 2006 220
Need Ohm readings for passenger front seat occupancy sensor
My SRS light has been on for a couple of weeks and passenger side front seat adjustment did not work. Took the car to the dealer and got a diagnosis that the seat module and the child seat/passenger sensor are fried. $2300 to fix them both. Decided to diy. Found out that fuse #66 was missing, put a new one in and the seat adjustment works. SRS still on. Now I have my s350 2006 W220 Passenger seat on my work table. I would like to know about the resistance for the front seat occupancy sensor before I pull the upholstery off. Everything looks nice and clean and if there is a broken wire or connector I guess I should not get any reading on the Ohm meter? Or has anyone successfully used one of those Chinese emulators to diagnose the SRS light? Any help appreciated.
The following users liked this post:
EastOfEdmonton (05-15-2022)
#2
Newbie
Thread Starter
Join Date: Jun 2012
Location: Florida, Palm City
Posts: 13
Likes: 0
Received 2 Likes
on
2 Posts
MB S350 2006 220
Passenger Seat occupancy sensor
Did little testing, seat part removed from seat assembly.
Applied 12.20V to Red wire. The reading from the White wire coming back from the seat sensor read 12.11V and the Brown read 11.86V. I applied over 80# weight on the seat and there was no change in the voltage on the White or Brown wire. Does anyone know if this means that the sensor is faulty?
Applied 12.20V to Red wire. The reading from the White wire coming back from the seat sensor read 12.11V and the Brown read 11.86V. I applied over 80# weight on the seat and there was no change in the voltage on the White or Brown wire. Does anyone know if this means that the sensor is faulty?
#4
Newbie
Thread Starter
Join Date: Jun 2012
Location: Florida, Palm City
Posts: 13
Likes: 0
Received 2 Likes
on
2 Posts
MB S350 2006 220
Seat Occupancy Sensor
Thank You for your advice.
Last edited by MBforMikeM; 08-04-2012 at 03:00 PM.
#6
Senior Member
Join Date: Nov 2009
Location: ON, CA
Posts: 310
Likes: 0
Received 0 Likes
on
0 Posts
2003 S430
please let us know how it went because im having the same problem so is my friend hes taking it to the dealer to find out whats the problem and fix it there i will tell ask about the voltage my dealer is pretty good and they'll tell me and asnwer any questions if i wanna do it my self
Trending Topics
#8
Newbie
Thread Starter
Join Date: Jun 2012
Location: Florida, Palm City
Posts: 13
Likes: 0
Received 2 Likes
on
2 Posts
MB S350 2006 220
Emulator
Bad news for me. The emulator did not remove the SRS warning light. The small light that indicates: Child Seat Airbag is not active, went on with the emulator all else the same. Drove the car for 15 miles. Maybe the one i ordered is not the right one. It came from Taiwan; Ecutool in 3 days. That was fast. Part was $19 and extra DHL charge was $30. I ordered the Type6 for W220, W163, W210 etc. years 2000 - 2005. this was the closest one I found for my W220 2006 S350. I guess it is back to the dealer or another MB authorized repair shop. Found one that would check the codes for $90. I live in Martin County Florida if anyone knows of a decent repair shop in my area.
For what it is worth: I checked the new emulator with an Ohm meter: red and brow=open circuit; no resistance, red and white=open circuit; no resistance, brown and white 20K-ohm resistance.
For what it is worth: I checked the new emulator with an Ohm meter: red and brow=open circuit; no resistance, red and white=open circuit; no resistance, brown and white 20K-ohm resistance.
The following users liked this post:
EastOfEdmonton (05-15-2022)
#10
Share Details
Benzer's
Please share the details of what your solutions are for this issue of the Child Seat Sensor problem. Many of us have the same issue as was stated by another poster.
Where did you find the Sensor. Company name, part number, payment method, website or link.
How did you install Sensor or Emulator.
What is the Emulator? Do it find the problem and diagnose or does it solve the problem. A picture would be great.
I have the problem and would like to solve it for my S500.
Thank you.
Please share the details of what your solutions are for this issue of the Child Seat Sensor problem. Many of us have the same issue as was stated by another poster.
Where did you find the Sensor. Company name, part number, payment method, website or link.
How did you install Sensor or Emulator.
What is the Emulator? Do it find the problem and diagnose or does it solve the problem. A picture would be great.
I have the problem and would like to solve it for my S500.
Thank you.
#11
SRS Diagnose -
I also bought the Emulator from ECUtools China. It took 5 days to arrive and that was with the $30USD DHL express delivery.
If you buy the emulator make sure that you solder the circuit pads as directed on the web page. It should work. My wires were not consistent.
The emulator has 3 wires (red, yellow and black) these should be connected to the yellow connector that attaches to the Child Sensor Mat and also has 3 wires (red, brown and white).
Red Wire emulator (B+) - to Red Wire (connector)
Black Wire emulator (Ground) - Brown Wire (connector)
Yellow Wire emulator (Line) -White Wire (connector)
You have to cut the wire from the Child Sensor Mat and splice them to the emulator.
Then re-insert the connector under the seat in the same location. you can tape the emulator to a location under the seat that will not get disturbed when the seat is moved back and forth.
You will need to have the code reset.
If you buy the emulator make sure that you solder the circuit pads as directed on the web page. It should work. My wires were not consistent.
The emulator has 3 wires (red, yellow and black) these should be connected to the yellow connector that attaches to the Child Sensor Mat and also has 3 wires (red, brown and white).
Red Wire emulator (B+) - to Red Wire (connector)
Black Wire emulator (Ground) - Brown Wire (connector)
Yellow Wire emulator (Line) -White Wire (connector)
You have to cut the wire from the Child Sensor Mat and splice them to the emulator.
Then re-insert the connector under the seat in the same location. you can tape the emulator to a location under the seat that will not get disturbed when the seat is moved back and forth.
You will need to have the code reset.
Last edited by majorpeace; 09-26-2012 at 11:45 PM.
#12
HELP wiht SRS Emulator
I also bought the Emulator from ECUtools China. It took 5 days to arrive and that was with the $30USD DHL express delivery.
If you buy the emulator make sure that you solder the circuit pads as directed on the web page. It should work. My wires were not consistent.
The emulator has 3 wires (red, yellow and black) these should be connected to the yellow connector that attaches to the Child Sensor Mat and also has 3 wires (red, brown and white).
Red Wire emulator (B+) - to Red Wire (connector)
Black Wire emulator (Ground) - Brown Wire (connector)
Yellow Wire emulator (Line) -White Wire (connector)
You have to cut the wire from the Child Sensor Mat and splice them to the emulator.
Then re-insert the connector under the seat in the same location. you can tape the emulator to a location under the seat that will not get disturbed when the seat is moved back and forth.
You will need to have the code reset.
If you buy the emulator make sure that you solder the circuit pads as directed on the web page. It should work. My wires were not consistent.
The emulator has 3 wires (red, yellow and black) these should be connected to the yellow connector that attaches to the Child Sensor Mat and also has 3 wires (red, brown and white).
Red Wire emulator (B+) - to Red Wire (connector)
Black Wire emulator (Ground) - Brown Wire (connector)
Yellow Wire emulator (Line) -White Wire (connector)
You have to cut the wire from the Child Sensor Mat and splice them to the emulator.
Then re-insert the connector under the seat in the same location. you can tape the emulator to a location under the seat that will not get disturbed when the seat is moved back and forth.
You will need to have the code reset.
Dear majorpeace,
I just came across your quote regarding SRS (3 wire Emulator). I just got one from eBay (no instructions included). After reading your guide, I'm still not sure how to do it. Can you please illustrate - do I attact the emulator on the mat side or the connector from the (say car).
Would greatly appreciate your cooperation. Thanks in advance
#13
Dear Gents,
I am also experiencing similar issue on W204. My SRS airbag led has started lighting. Airbag has not been exploded at all. I was advised to put some 100 Ohm resistor into cabling leading to seat occupancy sensor but it has not helped at all. Any advice would be highly welcomed. Thanks! Regards, Andy from Slovakia
I am also experiencing similar issue on W204. My SRS airbag led has started lighting. Airbag has not been exploded at all. I was advised to put some 100 Ohm resistor into cabling leading to seat occupancy sensor but it has not helped at all. Any advice would be highly welcomed. Thanks! Regards, Andy from Slovakia