Thread: How many KM have I got once I get "CHECK BRAKE PADS" warning

After a bit of reading on wear sensors;

They are monitored by the instrument pack. To imply that anything is just connected to a lamp is quite naïve - no switches or sensors are connected directly to what they control. The Instrument pack (on all modern euro cars) has an ECU build in, everything goes through the ecu and many sensors’ status are then relayed via the I bus to other systems and/or messages generated for display. The Instrument Pack has the logic which determines how long the brake pad light is displayed for and that logic has definitely changed but exactly when I couldn’t find. The change in logic added a function to recheck the sensor status on ignition on.

The sensor loom definitely has 2 wires in that sheath – I can even supply the colours.

Originally Posted by harlie

After a bit of reading on wear sensors;

They are monitored by the instrument pack. To imply that anything is just connected to a lamp is quite naïve - no switches or sensors are connected directly to what they control. The Instrument pack (on all modern euro cars) has an ECU build in, everything goes through the ecu and many sensors’ status are then relayed via the I bus to other systems and/or messages generated for display. The Instrument Pack has the logic which determines how long the brake pad light is displayed for and that logic has definitely changed but exactly when I couldn’t find. The change in logic added a function to recheck the sensor status on ignition on.

The sensor loom definitely has 2 wires in that sheath – I can even supply the colours.

Thanks Harlie

Yes taken out of context and on its own, I agree that stating that the lamp is not ECU controlled in incorrect. I think you'll find that the comment that the brake pad wear warning lamp is not ECU controlled is in context of the assertion that it triggers a fault code in the brake ECU and needs to be reset by diagnostic equipment.

Bacicat - thanks for the recommendation on British Parts UK. I ordered the front and rear brake pads + a front sensor Friday. They turned up this morning (Tuesday)! How impressive is that?

Thanks
David

Originally Posted by spudboy

Bacicat - thanks for the recommendation on British Parts UK. I ordered the front and rear brake pads + a front sensor Friday. They turned up this morning (Tuesday)! How impressive is that?

Thanks
David

What is the link to the UK LR parts supplier?
I used to use Paddocks but they have limited L322 parts especially for tdv8 models.

Jaguar | Land Rover spare parts at British Parts UK | British Parts UK

HTH
David

Originally Posted by spudboy

Bacicat - thanks for the recommendation on British Parts UK. I ordered the front and rear brake pads + a front sensor Friday. They turned up this morning (Tuesday)! How impressive is that?

Thanks
David

Yep, used them a few times now - always fast delivery, even over the weekend, and the freight prices are reasonable compared to other quotes I've had. Even got a cool mouse pad for free last time with a Jag and a Rangie on it, but SWMBO stole it for work!

Well that was an easy job. 1 spanner out of 10 I reckon. All done in an hour.

However, my Check Brake Pads warning is still coming on the console when I start or stop the car (boings a lot - which is annoying), and the red "Brake" light is still on.

I've tried resetting with my IIDTool diagnostic box (cleared all faults) but it's still warning me.

BTW - I replaced the sensor (which had worn through) when I replaced the pads.

What have I missed?

Ummm,

It sounds like you've done the two obvious things, which are to replace the pad sensor and take the car for a short drive. You did, didn't you?

If this is so then my understanding was that this should have nudged the ECU into realising that the brake pads had been replaced.

So, no pet theories right now but I'm researching.

Cheers,
Iain