Thread: EPB U3000-4B - over temperature (2B)

If the fault won't clear or keeps returning perhaps the cable is gummed up in the sheath and is not moving causing the actuator motor to overheat.

Thanks for the suggestion - I was hoping that the mechanism / cables weren't gummed-up from lack of use. The shoes are original and the disks too although those weren't fitted for 200K kms but the shoes and drums are as new.
The IIDtool shows the module voltage as 0V and motor current 0.00005A (nothing) even when the switch is pulled or pressed. I've confirmed battery voltage 12V+ at the pins in the connector at the module and have now seen in the wiring schematic that the module's earth connection is at a bolt 1.5m of cable away. I'll have a cuppa and maybe recover somewhat from the humidity then put the car back on ramps to find the earth connection / bolt which I hope hasn't been reattached.

Update: Unfortunately the earth point is inside the body in the left rear somehere and it wouldn't have been touched to remove the body. There are no unattached earth connectors near the earth studs inside behind the light cluster which is where I suspect the earthing occurs. The large connector above the chassis behind the left air-spring looks intact.

Could also be the EPB switch in the centre console wasn't reconnected in the body R&R. The steel wire cables don't gum up from lack of use, but using them drags dirt into the sheath, eventually stopping them moving.

The switch is working according to the IIDtool and operating the switch in either direction brings on the fault. The wiring schematic shows the 4 switch wires only going to the EPB module, not via some other module, so no false indications.

When the fault is cleared, the amber icon goes away but the red icon remains until an engine restart, but checking faults again with the red icon showing prior to the restart doesn't show any faults. I don't know what to make of this.

I'm suspicious of the parameter under 0x201c - park brake module system status - battery voltage 0 as the parameter module voltage supply shows the battery voltage.

Tomorrow I'll check the condition of the module where the release cable exits looking for any evidence indicating that the cable wasn't detatched before starting to lift the body. I'll also rope my wife into helping to allow me to listen for any sound from the EPB module when attempting to apply the EPB, as the bongs from inside drown out softer sounds.

If no sound can be heard from the actuator in high range, try it on low range as I have a theory that the actuator applies more force in low range, as I have found it screeching in low range and not high range. Not sure if that's a good or bad thing in your situation.