Disable the ABS/TC/descent
#1
![Default](https://landroverforums.com/forum/images/icons/icon1.gif)
OK so not wanting these unnecessary features and not wanting to spend a fortune fixing a weird fault I want to disable them altogether.
Now each wheel sensor has a signal cable running back to the SLABs. If instead of the cable running to the wheel it was just terminated with a resistor in the normal range the ABS expects then the ABS computer would then be happily ignorant.
For about $1.50 all my issues would go away. I cannot find the OHM resistance that would be required. Has anybody got that information please?
Once I have done this I can install the linkage for the CDL and I will have a basic disco where the driver is back in charge again.
Now each wheel sensor has a signal cable running back to the SLABs. If instead of the cable running to the wheel it was just terminated with a resistor in the normal range the ABS expects then the ABS computer would then be happily ignorant.
For about $1.50 all my issues would go away. I cannot find the OHM resistance that would be required. Has anybody got that information please?
Once I have done this I can install the linkage for the CDL and I will have a basic disco where the driver is back in charge again.
#4
![Default](https://landroverforums.com/forum/images/icons/icon1.gif)
It's not resistance it's measuring, it's PWM. Also, you'll no longer have a functioning speedometer, unless you provide the signal some other way.
There is nothing in the system that would cost a fortune to fix, no matter how weird. Even the most expensive parts, the modulator or the wheel hubs can be purchased used cheaply.
There is nothing in the system that would cost a fortune to fix, no matter how weird. Even the most expensive parts, the modulator or the wheel hubs can be purchased used cheaply.
#5
![Default](https://landroverforums.com/forum/images/icons/icon1.gif)
It's not resistance it's measuring, it's PWM. Also, you'll no longer have a functioning speedometer, unless you provide the signal some other way.
There is nothing in the system that would cost a fortune to fix, no matter how weird. Even the most expensive parts, the modulator or the wheel hubs can be purchased used cheaply.
There is nothing in the system that would cost a fortune to fix, no matter how weird. Even the most expensive parts, the modulator or the wheel hubs can be purchased used cheaply.
If they check that the ABS sensors and cables are OK by measuring the resistance then surely just providing that loop with 1000ohm in it would work.
What is PWM? How can I fool it?
A new hub I have seen complete with sensor at $400 but used at $250 plus a new sensor at over $100 so used does not make too much sense.
Last edited by Patrick Duffy; 11-14-2012 at 10:41 AM.
#6
![Default](https://landroverforums.com/forum/images/icons/icon1.gif)
Marty will sell you the used hubs for $50 each, with the sensor.
D2 hubs 50 shipped w. sensor - DiscoWeb Message Boards
PWM is pulse width modulation. Basically its reading pulses from the tone ring. D2 uses the wheels sensors for your speedometer too. If you just fed the system a fixed value, I bet your transmission would shift funny too. You might even get codes for implausible values.
There have been issues with older SLABS computers being too sensitive to noisy ABS sensors. The "fix" was to replace the SLABS computer with the newer 2004 model part number. What year is your D2?
D2 hubs 50 shipped w. sensor - DiscoWeb Message Boards
PWM is pulse width modulation. Basically its reading pulses from the tone ring. D2 uses the wheels sensors for your speedometer too. If you just fed the system a fixed value, I bet your transmission would shift funny too. You might even get codes for implausible values.
There have been issues with older SLABS computers being too sensitive to noisy ABS sensors. The "fix" was to replace the SLABS computer with the newer 2004 model part number. What year is your D2?
#7
![Default](https://landroverforums.com/forum/images/icons/icon1.gif)
It's not resistance it's measuring, it's PWM. Also, you'll no longer have a functioning speedometer, unless you provide the signal some other way.
There is nothing in the system that would cost a fortune to fix, no matter how weird. Even the most expensive parts, the modulator or the wheel hubs can be purchased used cheaply.
There is nothing in the system that would cost a fortune to fix, no matter how weird. Even the most expensive parts, the modulator or the wheel hubs can be purchased used cheaply.
#9
![Default](https://landroverforums.com/forum/images/icons/icon1.gif)
Originally Posted by Fram Rave:
Vehicle Speed Signal (VSS)
The VSS is used, by the ECM, to control idle speed and overrun cut off. The ECM receives the signal through a hard
wired connection direct from the SLABS ECU.
For vehicles fitted with an automatic gearbox, two vehicle speed signals are received by the ECM. The second signal
is derived from the main gearbox output shaft speed, and is sent to the ECM by the Electronic Automatic Transmission
(EAT) ECU though the Controller Area Network (CAN). The ECM compares the vehicle speed signal generated by
the SLABS ECU with that supplied via the CAN.
The VSS is used, by the ECM, to control idle speed and overrun cut off. The ECM receives the signal through a hard
wired connection direct from the SLABS ECU.
For vehicles fitted with an automatic gearbox, two vehicle speed signals are received by the ECM. The second signal
is derived from the main gearbox output shaft speed, and is sent to the ECM by the Electronic Automatic Transmission
(EAT) ECU though the Controller Area Network (CAN). The ECM compares the vehicle speed signal generated by
the SLABS ECU with that supplied via the CAN.
Originally Posted by also from Rave:
Speedometer
The speedometer informs the driver of the current vehicle road speed. It has a Liquid Crystal Display (LCD) to show
odometer, trip meter and, on automatic gearbox models, the selected gear. The speedometer will not show speeds
of less than 1.5 mph (2.5 km/h).
There are three different market configurations:
l NAS and UK = mph as major figures km/h as minor figures.
l Canada = km/h as major figures mph as minor figures.
l ROW and Australia = km/h only.
The Self Levelling and Anti-Lock Brake System (SLABS) ECU provides the signal input for the road speed. The signal
is at 8000 pulses per mile (1.6 kilometres).The speedometer informs the driver of the current vehicle road speed. It has a Liquid Crystal Display (LCD) to show
odometer, trip meter and, on automatic gearbox models, the selected gear. The speedometer will not show speeds
of less than 1.5 mph (2.5 km/h).
There are three different market configurations:
l NAS and UK = mph as major figures km/h as minor figures.
l Canada = km/h as major figures mph as minor figures.
l ROW and Australia = km/h only.
The Self Levelling and Anti-Lock Brake System (SLABS) ECU provides the signal input for the road speed. The signal
is at 8000 pulses per mile (1.6 kilometres).
The speedometer informs the driver of the current vehicle road speed. It has a Liquid Crystal Display (LCD) to show
odometer, trip meter and, on automatic gearbox models, the selected gear. The speedometer will not show speeds
of less than 1.5 mph (2.5 km/h).
There are three different market configurations:
l NAS and UK = mph as major figures km/h as minor figures.
l Canada = km/h as major figures mph as minor figures.
l ROW and Australia = km/h only.
The Self Levelling and Anti-Lock Brake System (SLABS) ECU provides the signal input for the road speed. The signal
is at 8000 pulses per mile (1.6 kilometres).The speedometer informs the driver of the current vehicle road speed. It has a Liquid Crystal Display (LCD) to show
odometer, trip meter and, on automatic gearbox models, the selected gear. The speedometer will not show speeds
of less than 1.5 mph (2.5 km/h).
There are three different market configurations:
l NAS and UK = mph as major figures km/h as minor figures.
l Canada = km/h as major figures mph as minor figures.
l ROW and Australia = km/h only.
The Self Levelling and Anti-Lock Brake System (SLABS) ECU provides the signal input for the road speed. The signal
is at 8000 pulses per mile (1.6 kilometres).
Last edited by jafir; 11-14-2012 at 12:05 PM.
#10
![Default](https://landroverforums.com/forum/images/icons/icon1.gif)
Well everything I have learned in the last few weeks reading all these blogs and forums has destroyed my previous impression of Landrover being Robust, Reliable, Repairable. I cannot believe the range of problems people suffer.
I have owned an S2, 90, 110, '75 Range Rover, early Disco TDI, '94 Range Rover. I have driven a '97 Disco around the Saudi desert for a week in 1997. It was a V8 Manual. Whilst I was there I met a guy who managed a fleet of several hundred vehicles for the oil industry. He said that the most reliable vehicles for that environment were Chevy Suburban and Toyota Landcruiser. He said Landrovers had real problems with sand and dust and were too expensive to fix. I remember him telling me that the Jeeps they had bought in the past were wrecks 1 year. Now I see what he means and should have taken note. To have to replace a whole front hub for a minor fault is a joke. I would have expected to have been able to dismantle it, replace the faulty tone ring, put it back together and maybe slap some new bearings in whether they were need or not.
It used to be the case that you could take Landrovers anywhere, a blacksmith in an African village could repair it. I would not put my faith in even a new one to go some of the places I have been. They seem to be just luxury AWD pimpmobiles. On reflection the 74 range rover had less problems than the 94 one. The 94 was an auto and great on the road but we lived up a rough track in Yorkshire. Its main problem was the tailgate would never stay shut due to the chassis flex and body stress cracks appearing in many key places. It did not help having the ECU under the seat - some deep water saw that off. My 110 was fully equipped for Rally Rescue - in support of the local fire service I took that through deep water to help some stranded people. The vehicle filled with water to the seat level - a useful feature because you will not get flotation - the bow wave came up the windshield. No problems with water in the diffs or gearbox after. I have a photo of my 90 trying to winch a Lightweight AirPortable out of a flash flood. The driver is stood on his roof. We ended up tying it off. The following day despite having been submerged he took the plugs out and pumped the engine dry, changed the oil and drove it away - and people criticize Lucas electrics!
It used to be a standing joke that 90% of range rover buyers believe going off road is parking in a field at the horse trials. I guess that is the market Landrover address these days.
Now if anyone remembers the Austin Champ - that was an off road vehicle!
I have owned an S2, 90, 110, '75 Range Rover, early Disco TDI, '94 Range Rover. I have driven a '97 Disco around the Saudi desert for a week in 1997. It was a V8 Manual. Whilst I was there I met a guy who managed a fleet of several hundred vehicles for the oil industry. He said that the most reliable vehicles for that environment were Chevy Suburban and Toyota Landcruiser. He said Landrovers had real problems with sand and dust and were too expensive to fix. I remember him telling me that the Jeeps they had bought in the past were wrecks 1 year. Now I see what he means and should have taken note. To have to replace a whole front hub for a minor fault is a joke. I would have expected to have been able to dismantle it, replace the faulty tone ring, put it back together and maybe slap some new bearings in whether they were need or not.
It used to be the case that you could take Landrovers anywhere, a blacksmith in an African village could repair it. I would not put my faith in even a new one to go some of the places I have been. They seem to be just luxury AWD pimpmobiles. On reflection the 74 range rover had less problems than the 94 one. The 94 was an auto and great on the road but we lived up a rough track in Yorkshire. Its main problem was the tailgate would never stay shut due to the chassis flex and body stress cracks appearing in many key places. It did not help having the ECU under the seat - some deep water saw that off. My 110 was fully equipped for Rally Rescue - in support of the local fire service I took that through deep water to help some stranded people. The vehicle filled with water to the seat level - a useful feature because you will not get flotation - the bow wave came up the windshield. No problems with water in the diffs or gearbox after. I have a photo of my 90 trying to winch a Lightweight AirPortable out of a flash flood. The driver is stood on his roof. We ended up tying it off. The following day despite having been submerged he took the plugs out and pumped the engine dry, changed the oil and drove it away - and people criticize Lucas electrics!
It used to be a standing joke that 90% of range rover buyers believe going off road is parking in a field at the horse trials. I guess that is the market Landrover address these days.
Now if anyone remembers the Austin Champ - that was an off road vehicle!
Thread
Thread Starter
Forum
Replies
Last Post
s10lowrider1994
Discovery I
13
01-16-2012 07:08 AM
ecustreetstang
General Tech Help
2
02-10-2005 06:34 PM