Gentlemen,
Does anyone know where the Vehicle Speed Sensor is located on an e24 and how to test it?
Thanks,
Scott
Vehicle Speed Sensor
Moderators: GRNSHRK, ron, bfons
Vehicle Speed Sensor
1983 Bronzit 633CSi 5 speed
2004 Audi TT Quattro 6 speed
Scott
2004 Audi TT Quattro 6 speed
Scott
- hornhospital
- Platinum Member
- Posts: 2931
- Joined: Sun Jul 11, 2010 6:46 pm
- Location: Silverhill, AL
- Contact:
Re: Vehicle Speed Sensor
On the second generation E24s (after mid 1982) it's in the back of the differential. It's a pulse generator. I don't recall exactly how to test it, but I know they seldom fail. It's usually the wiring that breaks.
Ken Kanne
'84 633CSi "Sylvia"; '85 635CSi "Katja";'85 325e "Hazel Ann"; '95 M3 "Ashlyn"
'84 633CSi "Sylvia"; '85 635CSi "Katja";'85 325e "Hazel Ann"; '95 M3 "Ashlyn"
Re: Vehicle Speed Sensor
Thank you Ken.
1983 Bronzit 633CSi 5 speed
2004 Audi TT Quattro 6 speed
Scott
2004 Audi TT Quattro 6 speed
Scott
Re: Vehicle Speed Sensor
the sensor in the diff is a reed switch type device. It 'reads' a toothy wheel inside the diff. With the car jacked up the sensor should measure either open circuit or dead short on a DMM with a 50% duty cycle, changing several (eight?) times per wheel revolution.
IIRC with the ignition on, measuring at the diff sensor connection, one of the two harness wires should read +12V and the other one should have a measurable impedance to ground
cheers
IIRC with the ignition on, measuring at the diff sensor connection, one of the two harness wires should read +12V and the other one should have a measurable impedance to ground
cheers
~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Re: Vehicle Speed Sensor
That's what I was missing.
Thanks Brucey.
Thanks Brucey.
1983 Bronzit 633CSi 5 speed
2004 Audi TT Quattro 6 speed
Scott
2004 Audi TT Quattro 6 speed
Scott
- hornhospital
- Platinum Member
- Posts: 2931
- Joined: Sun Jul 11, 2010 6:46 pm
- Location: Silverhill, AL
- Contact:
Re: Vehicle Speed Sensor
That's what I couldn't remember. If it was a reed switch or a Schottky device, and how to test it. Thanks Brucey!
Ken Kanne
'84 633CSi "Sylvia"; '85 635CSi "Katja";'85 325e "Hazel Ann"; '95 M3 "Ashlyn"
'84 633CSi "Sylvia"; '85 635CSi "Katja";'85 325e "Hazel Ann"; '95 M3 "Ashlyn"