Fault code C1151

Morning all, I recently purchased a Fl td4 2.0 auto. Its a nice looking hippo and I got a good deal on it (or so i thought) . The issue is that has me worried is that the HDC failure light comes on and knocks the engine into limp mode. If I start the car up it doesn't come on until I select a gear and move forward or back or if I rev it and it reaches about 3000rpm . I took it to a landrover garage and he said that there was nothing in 5th gear?? I have fixed a few worn wires replaced the dash coz it looked as though the SRS bulb had been pulled out ( dont know why!!). The 3 amigos came on at 50mph then off as fast as they appeared. And this C1151 code always appears : CAN : communication gearbox - permanent. I have read up about how CAN works and in my head I'm thinking wheel speed sensor or 'g' sensor maybe causing this?? I have done the can barrel check via YouTube and seems to be getting no reading on 2/4 duty brake solenoid and fluid temp sensor. ( could this be the main issue or the abs stopping the gear box from working correctly ?? )
All the codes that were reset were intermittent or permenant / no signal / short circuit to ground.

Please help

Thank you in advance

Kenneth

Hi there, welcome to the forum.

I don't know what this C1151 code means - however, I've just types it into the search box (top right) and search teh freelander forum and its come up quite a bit and looks to be in threads about gearbox and 3 Amigos. i haven't dug into them - maybe you might like to have a look and see what conclusions were made.

Have a read of this thread.

https://www.landyzone.co.uk/land-ro...e-light-of-f1-v6-in-3rd-world-country.360251/

Surely can network fault would indicate network fault for the gear box. So it is unable to get abs sensor speed readings from the abs module.
I would start there and confirm can bus at gearbox.
Are any other modules off line?

Yeah I have read that thread and alot more I have screenshot 200 informative articles mentioned in this forum lol, mine is o ly the HDC warning lamp and f4. The 3 amigos came on when I was taking it to the garage and the rev counter also dipped . I've looked through the wiring and general manuals and the more I look at them the more I worry, sticking throttle sensor or pedal could be one issue or the gear inhibitor switch could be iffy when I look at warning lamp errors?

But seems its coming from the abs ecu?

Thanks for the welcoming to the group and info provided so far.

Todays venture will be looking at abs sensors and relutors to see if they are all good.

J_D said:

Surely can network fault would indicate network fault for the gear box. So it is unable to get abs sensor speed readings from the abs module.
I would start there and confirm can bus at gearbox.
Are any other modules off line?

Click to expand...

There was alot when I first got in diagnosed but cleared alot of them and left the c1151 in abs. Someone had took the srs light out for some absurd reason?? So I directed myself down that rabbit hole thinking there was something wrong in that module.

I'm hoping to get back to the garage today and get the codes read again in all fields of ecu's and see what clear and what remains if its still c1151 then I will get the mechanic to look at all expects of the wheel / abs sensors.

Feels its not as big as it looks but can comms are a nightmare

These cables in the picture were under the battery mount so I cleaned and made good . One job after another with these machines haha

If you're not getting any errors relating to the ABS sensors, I'd imagine it not worth time/money checking them.

The ABS system would also not put the engine into limp mode or cause the rev counter to misbehave.

So I don't think you have any problems with the ABS system as such. The problem looks like it can't get the information it needs - like which gear the car is in.

I'm no expert, but it looks like there's some form of problem in the car's network. If I was taking it anywhere, I think I'd be heading to an auto electrician. Dunno what others think.

Where CAN data seems to be going missing, then I'd suspect the Ipack (dashboard) as that's used as the main communication hub for the high speed CAN bus between the CAN enabled modules (ABS, TCM, EDC and Ipack).

It won't be the wheel sensors, as those would flag codes for wheel sensors.

My money is on the Ipack, or its connections

I changed the ipack last week as the SRS bulb had been removed (mot fail). I replaced with an exact code number also. The connectors where good and showed now signs of water or corrosion. Its baffling me this car but I'm enjoying getting to know the inner workings of it, just hope its something stupid.

Are there any earth points that can go faulty by any chance?? Again with some codes coming up as no ground / short circuit??

I think an auto electrician could be the case.
I'm pretty sure this all occurred when I braked down a farmers lonning and something made a bang / locked up then free.... as though something got stuck then freed itself??

The car speaks when braking but doesn't seem to be from the brakes more like drive shift area?? Oil looks as though it has weeded for a box of some sort?

I'm maybe looking way to far into it.... but if it can be fixed on the drive for before money is handed it that is always first option.

Cheers for all the replies
Cheers

Do you have a multi-system code reader?

No not on me Nodge I did put the codes in on a previous post mind from the first diagnostics. But this is what I got after we cleared them ..... see picture

Bowesie said:

No not on me Nodge I did put the codes in on a previous post mind from the first diagnostics. But this is what I got after we cleared them ..... see picture

Click to expand...

That code could be a red herring, I believe the manual Freelander also shows a gearbox coms error.

I would measure the resistance of the CAN lines at each module (Ipack, ABS, EDC and TCM), to check the resistance is similar.

So it definitely isn't a gearbox issue you think??

I will have a look and get the multimeter out .

Am sure the abs ecu talks to the EAT ecu and from the blue connector pins in the E box as hippo shows in his vid on YouTube I wasn't get a reading off 2-4 brake duty solenoid and fluid temp sensor all the rest were the same ohms. The connects are tight I cleaned them up also. So maybe something aint getting to the Eat to transfere to the gearbox?

Strange how the code doesn't come on when ignition is turned but does when I rev over 2500rpm standing still

How big of a job is new gear box replacement if all goes south and its worse case scenario??

Cheers

Bowesie said:

So it definitely isn't a gearbox issue you think??

Click to expand...

I can't remember. Maybe another forum member with a manual TD4 would be kind enough to check for that code?

Bowesie said:

I will have a look and get the multimeter out .

Click to expand...

I would, as you need to prove the CAN bus line is correct.

Bowesie said:

Strange how the code doesn't come on when ignition is turned but does when I rev over 2500rpm standing still

Click to expand...

That is strange.

Bowesie said:

How big of a job is new gear box replacement if all goes south and its worse case scenario??

Click to expand...

It's not impossible to do at home, but you'll need a way to lift the box, as it weighs around 100kgs. An engine crane would be helpful, to lift it into place.

I cant remember seeing that code last time I plugged my manual td4 in.
I'm sure no codes stored with a wurth delphi clone, and none from my tracker (black box in obd that shows codes if any)
If I can I'll try and get some multimeter reading for the can bus at the abs mod at the weekend, should be the same between can high and low at any point of the network.

Hello, I have the same problem...
I have two errors C1151 and C1018
Errors appear on the panel when passing a left turn
I plan to first look at the front left ABS sensor (the wire may be broken somewhere), and then look at the CAN bus wiring
Sorry for my English, I'm from Ukraine

Well, as the result, I solved my error codes by replacing the ABS sensor and repairing the outer CV joint ...