Anyone ever rebuilt their VSS?
#1
11-17-2011, 10:52 AM
Anyone ever rebuilt their VSS?
So I spoke with Mike this AM regarding my lack of power/torque climbing uphill and from all accounts, sounds like my VSS is crapping out. He did mention he's heard of people tearing into them, cleaning, dia-electric grease and reinstall. Anyone ever done this? If so how easy?
#3
11-17-2011, 11:01 AM
Pro Wrench
#7
11-17-2011, 12:08 PM
Super Moderator
This guy? Speed Sensor / Transducer - Vehicle - Road - Vss | Land Rover Electrical Parts, Batteries, Relays, Lamps & More
The RAVE says his output goes to speedometer via a buffer inside the instrument cluster. The signal also goes to cruise and to ECM after being buffered (signal processed). The signal is battery volts to zero, six times per wheel turn.
This is going to be a sensor that picks up rotating parts inside the transfer case, similar to crank position sensor on the engine. You might have some success with remove and clean and re-install, who knows if metal trash floating around in T Case fluid has stuck to the pick up surface, gnarly wire connector, etc. Or if sealed plastic housing has allowed water to enter, which would change electrical pickup performance. So if you took it off, dry on dash board in sun, in a zip lock bag, to show up any moisture coming out, inspect for leaks, etc. If that works, paint outside with something to keep out moisture. If you decide to bake in oven or use hair dryer, stay at lower heat to avoid melting plastic.
Not going to be much inside to repair, especially if intermittent, although perhaps a solder joint. But that's a stretch.
Since this is what reports to ECM, and that shows up on OBDII port for scanner, you could monitor this, one would think that if this is conking out, speed signal to ECM would vary from real road speed.
Might also be a salvage yard or dismatler part. About $161 at Rock Auto.
The RAVE says his output goes to speedometer via a buffer inside the instrument cluster. The signal also goes to cruise and to ECM after being buffered (signal processed). The signal is battery volts to zero, six times per wheel turn.
This is going to be a sensor that picks up rotating parts inside the transfer case, similar to crank position sensor on the engine. You might have some success with remove and clean and re-install, who knows if metal trash floating around in T Case fluid has stuck to the pick up surface, gnarly wire connector, etc. Or if sealed plastic housing has allowed water to enter, which would change electrical pickup performance. So if you took it off, dry on dash board in sun, in a zip lock bag, to show up any moisture coming out, inspect for leaks, etc. If that works, paint outside with something to keep out moisture. If you decide to bake in oven or use hair dryer, stay at lower heat to avoid melting plastic.
Not going to be much inside to repair, especially if intermittent, although perhaps a solder joint. But that's a stretch.
Since this is what reports to ECM, and that shows up on OBDII port for scanner, you could monitor this, one would think that if this is conking out, speed signal to ECM would vary from real road speed.
Might also be a salvage yard or dismatler part. About $161 at Rock Auto.
#10
11-17-2011, 04:46 PM
Super Moderator