I have a 2010 LR4 with the parking brake icon flashing continuously (red) and U2002-92 (2B) code on when scanned with Gap tool.

The only thing I've done so far is replace the EPB switch which has had no effect

My questions are as follows
1. Does anyone know if there's a reset that needs to be done? I tried to clear codes but it either doesn't clear or comes right back.
2. I'm thinking the next logical step would be to trace the 4 wires that come off the switch to the Parking Brake Module
3. Is the Parking Brake Module on the wiring diagram the Parking brake actuator (LR072318) or something else?
4. Does anyone know if there are specific areas of the harness to check first/common failure points?
5. Anything else I'm overlooking? Something completely silly I forgot to do? Please let me know before I crawl through snow to trace the harness

LR4 2011 EPB Circuit diagram (LHD Vehicles)

 

I suppose you could be right in assuming the switch was the culprit... but further investigative measures were clearly needed.
One of the reasons for throwing that particular code is also the typical reason... slow activation of the parking brake.
Out of interest, was the engine running when you attempted to activate the epb?

Slow activation has roots in insufficient voltage, insufficient current or contaminated parking brake lines.
So, for giggles. (and as it is in fact the fist pinpoint test) With the engine not running, with the battery not connected to a charger, with the battery sitting not under load for 6 hours, what is the voltage reading?
Also, what other codes have been thrown?
Cheers.

 

Hi guy, thanks for the input!

I'm not sure if the engine was running or not when the code first appeared, I purchased the car this way 2-3 weeks ago and am working on getting it sorted. The code is persistent however, it doesn't go away or stop flashing at all

With the engine off after sitting overnight (not charging) I have 12.68V measured by my multimeter, with the ignition on the GAP tool shows 12.5V (this is at 10*F)

I just rescanned the codes after driving a while (since I did a reset yesterday trying to clear the EPB code) and have the following, I didn't see/notice the ACM communication lost code before but it seems that may be related?

 

As the voltage seems sufficient and as per the workshop manual, could we start with a system reset (disconnect both battery leads from the battery...)
Reconnect then read the codes again?

Though I don't think its stated anywhere, the EPB requires significant power. As such, I only engage/disengage when the engine is running. (I too have experienced these messages before)

As you have already replaced the switch I think we can rule that out.

 

Sorry I should have mentioned, I tried a system reset after replacing the EPB switch, code popped back up immediately without touching the switch at all

Noted on only using the EPB with engine running, I’ll make sure to do that!

 

no real basis for this but my money is on the EPB module itself. It lives in a tough environment and is kind of abused by owners a lot of the time; also most owners never have the shoes adusted which also wears the module out.

 

The module itself is certainly a possibility, do you know if the module at the rear of the car (near the spare tire) is the one referenced in the circuit diagram? If so it seems possible to test for resistance in the harness/connectors before blindly replacing

This car has spent its life on Wisconsin’s salty roads so it’s certainly had a tough 15 years battling corrosion

 

except…. I would expect a module DTC.

 

All good points, perhaps it's just power to the switch or something (though the backlight does glow)

Either way I think I'll start tracing wires and maybe that'll come up with something

 

the module is tucked up by the frame in front of the spare behind a panel. If salted most of its life, expect a real PITA to r & r it or get to it to test. Like LR put the module on the assembly line then built the suv around it.