Citroën C6 rear ABS sensor

[cornesoutafrica]

Hi everyone.

Anyone ever attempted to replace the rear left wheel ABS sensor on a C6 with loungepack? Do I need to drop the dieseltank to get to the plug or is it relatively straightforward?

Kind regards
Corne

[GiveMeABreak]

It looks like a 'remove diesel tank' job Corne.....

Then after that:
Partially open windows
Disconnect the battery:

BSI Reset / Battery Disconnect / Reconnect Procedure

Raise and support the vehicle, with the rear wheels hanging free.
Remove the fuel tank

On the left-hand side Disconnect the connector at " b ". Detach the wheel sensor harness at "a". On the right-hand side Disconnect the connector at " c ". Detach the wheel sensor harness at "d"	Release the harness at "e". Remove: The (1) bolt The wheel sensor

Refitting:

Avoid contact on the head of the wheel sensor

Note: Grease the body of the wheel sensor (grease - Type TOTAL N4128).

Refit:

• The wheel sensor
• The (1) bolt, tighten to 0,8 ± 0,1 daN.m

Secure the harness at "e".
Position the fuel tank, using a lifting tool a few centimetres from the bodywork.

On the left-hand side

• Attach the wheel sensor harness at "a".
• Connect the connector at "b".

On the right-hand side

• Attach the wheel sensor harness at "d".
• Connect the connector at "c".

Refit the fuel tank.
Reconnect the battery (see procedure).

[GiveMeABreak]

Do you want the fuel tank removal instructions?

[cornesoutafrica]

I thought it might be straight forward?? What was I thinking haha.

Please Marc. I appreciate it

[GiveMeABreak]

I’m out at the moment. Will sort this out when I’m back

[GiveMeABreak]

Ok, goes without saying, if lifting off the grounds with wheels unsupported (hanging), suspension on high, remove LDS cap before lifting - then after job is complete, lower to ground, lower suspension back to normal and replace LDS cap (risk of tank bursting).

Tools

Recommended tools are a plug kit and of course a fuel draining machine

Warnings: Respect the safety and cleanliness recommendations that are specific to high pressure diesel injection (HDi) engines.

Removing

• Keep the luggage compartment lid open.
• Open the fuel filler flap
• Disconnect Battery as per procedure

Rear bench seat (two-thirds/one-third) Open the rear right door. Raise: The rear seat The carpet The blank (1) Rear seats Open the rear right door. Remove: The rear central console (see the relevant operation) The rear RH seat (see the relevant operation) The blank (1) Removing (continued) Unclip the connector "a". Disconnect and move aside the connectors "a", "b" and "c". Uncouple: The tube (2) The tube (3) The tube (4) The tube (5)

Drain the fuel tank.
Raise and support the vehicle, with the rear wheels hanging free.

Remove:

• The right hand rear wheel
• The rear RH splash shield

Remove and attach the filler cap (6). Remove: The O-ring (7) The additive reservoir.

Remove: The exhaust pipe (8) (particle filter / rear silencer connection) The underbody protectors (9) and (11) The heat shield (12) Use a lifting tool to hold the fuel tank in position. Remove: Clamps (10) and (13) The filler neck fixing Lower the fuel tank (14) by 15 cm.

Disengage the filler neck (15) from the seal (16). CAUTION: Take care not to damage the fuel flap seal. Unclip and pull away the ABS sensor harnesses.

Detach and move aside the harnesses of the wheel travel sensors. Lower the fuel tank (14) by disengaging the filler neck (15) on the RH side. Remove the fuel tank (14).

Refitting
Proceed in the reverse order to removal.
Prime the fuel circuit.
Check that the fuel gauge operates correctly.

[DHallworth]

I’ve done one on mine previously. With the tank in place it’s nigh on impossible unless you remove the back seat.

Even with the seat removed you still can’t clip the cable into the guides on top of the diesel tank.

Dropping the diesel tank isn’t a bad job, it’s just time consuming. Follow the guide above and you’ll be fine.

David.

[cornesoutafrica]

Thanks Marc/David

I delved in today. I broke just about very single 10mm spanner bolt which in conjunction with a myriad of clips holds the undershields in place... Rust is such an evil thing, our cars the same age as my C6 doesn't have nearly the rust the C6 has, blasted saltroads!!!! Anycase stopped now as I have to grind off the exhaust clamp joining the DPF and the intermediate exhaustpipe....

I noticed my Eolys is almost finished, my guesstimate is less than a liter.... I will have to get some rather soon. Tomorrow dropping the tank completely and fitting the sensor, I hope my speedcontrol will also function then and the ESP faultcode be gone.... and the fauly handbrake message..... I made sure it is the sensor before delving in this deep. Pics also coming soon... Might aswell finish my progress in this thread and continue in the other one in my blog.

Keep you posted
Corne

[hattershaun]

It's common practise to replace both rear ABS sensors on a C6 whilst the fuel tank is out. Relatively small cost of the part vs a time consuming job.

[cornesoutafrica]

Hi Shaun

You are right, I should replace both. But I ended up getting only one. I don't think given time of year and where I am, another will be in time, so I will have to make do with replacing only one. Atleast if the other one needs replacing in the future, the nuts and bolts won't be such a hassle as currently the biggest issue is loosening the bolts and nuts without breaking them off...

might aswell order the Eolys with the other ABS sensor. Where do you guys suggest one gets the Eolys from?

regards
Corne