3 Amigo without codes

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GP1006

New Member
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6
Hi all, new to the forum and perhaps someone can help me please

Have a Freelander 1 1998 diesel.

The 3 Amigo lights are on but just put on Snap-on diagnostics and was expecting perhaps an ABS sensor fault code. But there are no codes listed which surprised me.
Has anyone seen this before and have any suggestions ?
Thanks
 
You'll need a F1 specific code reader for it to connect to the ABS.

You may find a generic tool that will talk tot he ABS - but that's hit or miss.

If the reader is just talking to the main engine ECU it won't find the codes. In fact, it's probably not even connecting to that as its not ODBII compliant.

Just so you don't go throwing parts at it, both times I've had 3 Amigos on my similar '99 diesel, it has been the shuttle valves in the Wabco modulator that have gone - this is common - but you wouldn't want to throw that part at it without prior confirmation that it is that which has gone.

Get yourself a F1, and early F1/Wabco, compatible reader, or take it to an indie LR garage to read the codes.
 
Thanks for your advice. The ODB reader used is a professional one that costs £1000s and had the vehicle and chassis listed on it after connection.. I also have the SRS light on and it gave me three codes for that system. So is ODB compliant ?
 
If your diagnostics tool has the options, point it to Wabco ABS. It will then talk to the ABS ECU and will get the error codes. If it doesn't support Wabco, then you won't be able to get them.

I have plugged a 'generic' type reader into mine that could not talk to the engine ECU but would connect to the ABS ECU. So you might be lucky.
 
@GrumpyGel
I’ve just been over and plugged Pscan in for @GP1006.
Connected to Wabco ECU and no codes. In fact, could only find a code on the engine side for the fuel temp sensor, and a code on the srs side… possibly linked to 3 amigos?

Took it up the road for live data, which showed wheel speeds on all 4 corners.
Interestingly, it showed them all doing 1.7kph while stationary (?!), and lost connection to the Wabco ECU after about 10seconds of driving - twice… is that normal?

HDC light went green whilst in neutral, but orange as soon as started driving - even in 1st.

Any ideas where to look next?

@GP1006 will post a pic of live data later.
 
@GrumpyGel
I’ve just been over and plugged Pscan in for @GP1006.
Connected to Wabco ECU and no codes. In fact, could only find a code on the engine side for the fuel temp sensor, and a code on the srs side… possibly linked to 3 amigos?

Took it up the road for live data, which showed wheel speeds on all 4 corners.
Interestingly, it showed them all doing 1.7kph while stationary (?!), and lost connection to the Wabco ECU after about 10seconds of driving - twice… is that normal?

HDC light went green whilst in neutral, but orange as soon as started driving - even in 1st.

Any ideas where to look next?

@GP1006 will post a pic of live data later.
I'm pretty sure the Amigo lamps on the dash are powered by wires coming from the Wabco ecu...

1744453887303.png


So if they are lit, it is because these pins have been powered by the Wabco ecu. Strange there are no error codes in it.

When HDC is selected, the HDC Information light should flash and then go solid when 1st or reverse is selected (and presumably once the clutch has been lifted). Are you saying this is lit solid when HDC is turned on, but then goes out and the HDC Warning lamp comes on? Or was HDC not selected?

It doesn't look like the Wabco ECU is faulty - you've been able to get data from it and the speedo is also controlled by it - which is presumably working.

It would be interesting to see if the scan tool can pick up an error if there definitely is 1 there - for example disconnect a wheel sensor.

Its a funny one for sure.
 
You can manually check the sensors by putting a multimeter on the output. Set it to resistance, and you should get something around 1k Ohms. If you them set the meter to AC volts and spin the wheel, you should see a voltage being delivered. A scope is better for tracing the voltage output, but just getting a reading will mean it's working.
 
Does the light stay on normally until you start driving? If so you'll only be able to read wheel speed when the light is on
Think it's normal to have a speed>0 at stationary
Normally HDC light would only illuminate when selected and in neutral, first or reverse, but flash if in any other gear iirc
 
You can manually check the sensors by putting a multimeter on the output. Set it to resistance, and you should get something around 1k Ohms. If you them set the meter to AC volts and spin the wheel, you should see a voltage being delivered. A scope is better for tracing the voltage output, but just getting a reading will mean it's working.

Cheers Nodge - at least this would prove/disprove the sensors directly…
 
I'm pretty sure the Amigo lamps on the dash are powered by wires coming from the Wabco ecu...

View attachment 338796

So if they are lit, it is because these pins have been powered by the Wabco ecu. Strange there are no error codes in it.

When HDC is selected, the HDC Information light should flash and then go solid when 1st or reverse is selected (and presumably once the clutch has been lifted). Are you saying this is lit solid when HDC is turned on, but then goes out and the HDC Warning lamp comes on? Or was HDC not selected?

It doesn't look like the Wabco ECU is faulty - you've been able to get data from it and the speedo is also controlled by it - which is presumably working.

It would be interesting to see if the scan tool can pick up an error if there definitely is 1 there - for example disconnect a wheel sensor.

Its a funny one for sure.
The strange thing for me is how I could read the Wabco fine, and see live data, but is lost connection within 10 seconds of actually driving. Then did the exact same thing again.
 
@GrumpyGel
I’ve just been over and plugged Pscan in for @GP1006.
Connected to Wabco ECU and no codes. In fact, could only find a code on the engine side for the fuel temp sensor, and a code on the srs side… possibly linked to 3 amigos?

Took it up the road for live data, which showed wheel speeds on all 4 corners.
Interestingly, it showed them all doing 1.7kph while stationary (?!), and lost connection to the Wabco ECU after about 10seconds of driving - twice… is that normal?

HDC light went green whilst in neutral, but orange as soon as started driving - even in 1st.

Any ideas where to look next?

@GP1006 will post a pic of live data later.
1.7kph when stationary is normal. I think that this is the "slowest" speed that it can sense.
The diagnostic protocol gets cut off above a certain speed, for "health and safety" reasons.
The ABS is not actually functioning when the diagnostic protocol is running and LandRover didn't want anyone having a crash due to no ABS driving around with a tool plugged in, so they throw you out.
Just drive around slowly (so no more that 10 or 15mph I guess, and the connection keeps working.
 
1.7kph when stationary is normal. I think that this is the "slowest" speed that it can sense.
The diagnostic protocol gets cut off above a certain speed, for "health and safety" reasons.
The ABS is not actually functioning when the diagnostic protocol is running and LandRover didn't want anyone having a crash due to no ABS driving around with a tool plugged in, so they throw you out.
Just drive around slowly (so no more that 10 or 15mph I guess, and the connection keeps working.
Ah!
Thanks - good to know 👍
 
So grateful to Freddie17 for coming over today and for all of your suggestions.
I have attached the data from PSCAN as we were driving along. Sorry that it sis not that easy to read.
WhatsApp Image 2025-04-12 at 16.43.28_a59efd6d.jpg

Mostly the HDC green light does not appear. It came on once when Freddie17 was testing but usually only the orange HDC is on. they are 2 different bulb locations. So the green light was on at the same time as the orange but only once.
 
So grateful to Freddie17 for coming over today and for all of your suggestions.
I have attached the data from PSCAN as we were driving along. Sorry that it sis not that easy to read.View attachment 338824
Mostly the HDC green light does not appear. It came on once when Freddie17 was testing but usually only the orange HDC is on. they are 2 different bulb locations. So the green light was on at the same time as the orange but only once.
Didn’t notice that at the time… both front sensors have 0 DC, but both rears have ~2.4… 🤔

Maybe try Nodge’s suggestion with a multimeter on the fronts first
 
You can manually check the sensors by putting a multimeter on the output. Set it to resistance, and you should get something around 1k Ohms. If you them set the meter to AC volts and spin the wheel, you should see a voltage being delivered. A scope is better for tracing the voltage output, but just getting a reading will mean it's working.
Thanks Nodge68 Do I test this at the plug for the sensor between the two pins ?
 
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