ABS Sensor

osmium · Post by **osmium** » 20 Feb 2010, 14:32

During my unsuccessful attempt to replace a front bearing (couldn't get the axle out) I removed the abs sensor from the wheel. So it wouldn't be dangling, I also disconnected the electrical connector.

When I put everything back together to take it to the shop for the bearing replacement, the ABS and Tracs lights came on.

Is there somewhere in the engine compartment I can get the codes? i have a 96 GLT. I'm thinking I can't.

Is it likely I hosed the sensor? I thought I was really careful with it.

Not a good week with the Volvo.

-os

Paramedic · Post by **Paramedic** » 20 Feb 2010, 16:30

Have a look in the engine bay and see if you have the twin diagnostic sockets. they will be on the right hand side in front of the ECU box. If yes then you can read the codes from counting the LED pulses. My '93 850 had them but think they changed soon after.

If it's not there then you'll need a code scanner to plug into the OBD II port located behind under the centre armrest behind the handbrake.

jjsull · Post by **jjsull** » 20 Feb 2010, 16:45

Make sure the sensor was free of dirt, dust, rust, grease.
Same for the pulse wheel.
Check the plug for contaminents.

Good luck

osmium · Post by **osmium** » 20 Feb 2010, 17:03

Paramedic wrote:Have a look in the engine bay and see if you have the twin diagnostic sockets. they will be on the right hand side in front of the ECU box. If yes then you can read the codes from counting the LED pulses. My '93 850 had them but think they changed soon after.

If it's not there then you'll need a code scanner to plug into the OBD II port located behind under the centre armrest behind the handbrake.

I don't have those diagnostic sockets. I am under the impression that ABS and SRS type codes can't be read with generic OBDII reader. On 1996 and newer a Volvo scan tool or equivalent is needed.

i was hoping the diag sockets were in a different location.

jjsull wrote:Make sure the sensor was free of dirt, dust, rust, grease.
Same for the pulse wheel.
Check the plug for contaminents.

Good luck

I though I cleaned it pretty well.

Where is the pulse wheel?

-os

Post by **polskamafia mjl** » 20 Feb 2010, 17:15

96 and on model Volvo's do not have any OBD I ports, only OBD II. You are right Osmium that ABS codes can't be read with a generic OBD II reader.

osmium · Post by **osmium** » 20 Feb 2010, 17:27

polskamafia mjl wrote:96 and on model Volvo's do not have any OBD I ports, only OBD II. You are right Osmium that ABS codes can't be read with a generic OBD II reader.

The diagnostic sockets in the engine compartment are OBDI?

-os

Post by **wheelsup** » 20 Feb 2010, 17:35

Unless you snapped some wires by bending them I can't see how you'd fug it up, it seems like a pretty basic piece of equipment - something with a non-moving magnetic sensor on the end to detect movement. Maybe try cleaning the wire plug again with some electrical contact cleaner.

Is this the thing you are talking about? Did you unplug the red connector piece/clip at the top of it? If so it didn't need to be unplugged to remove the axle, I took both front axles out one with taking the ABS sensor out like above and the other with just leaving it in and not touching it.

osmium · Post by **osmium** » 20 Feb 2010, 17:52

wheelsup wrote:Unless you snapped some wires by bending them I can't see how you'd fug it up, it seems like a pretty basic piece of equipment - something with a non-moving magnetic sensor on the end to detect movement. Maybe try cleaning the wire plug again with some electrical contact cleaner.

Is this the thing you are talking about? Did you unplug the red connector piece/clip at the top of it? If so it didn't need to be unplugged to remove the axle, I took both front axles out one with taking the ABS sensor out like above and the other with just leaving it in and not touching it.

That's it.

The write up from VS said you could take it out to clean the rust off the spindle. Not necessary, but I was being cautious. Since I couldn't get the wire out of the holder, I disconnected the electrical connector because didn't want the sensor dangling. Next time I'll leave it in.

-os

Post by **wheelsup** » 20 Feb 2010, 18:59

That's weird I wonder what happened? Makes me scared to try it on my car.

Post by **polskamafia mjl** » 20 Feb 2010, 19:25

osmium wrote:
polskamafia mjl wrote:96 and on model Volvo's do not have any OBD I ports, only OBD II. You are right Osmium that ABS codes can't be read with a generic OBD II reader.

The diagnostic sockets in the engine compartment are OBDI?

-os

Yes sir.