Any ideas on where the QCCM is located and a part number?

My 2017 LR D5 (L462) has had significant diesel lag since I bought it. It’s most noticeable/annoying at four way stop signs. I noticed there were ecu updates available for just about every module. On updating the modules (including the transfer case and transmission modules) it helped reduce the lag considerably. It didn’t trigger a MIL lamp, but now I have one DTC B1412-96. It appears to be a QCCM (quiescent current control module ) failure. The module is referenced in the workshop manual in topix, but I can’t find a part number or it’s location. The Rover runs perfectly so I am reluctant to take it to the dealer. For the ECU flashes I used a quality battery maintainer, Panasonic tough book Cf53 loaded with pathfinder, and I a real DA D-PDU dongle.

 

here's what I found related to QCCM:CONTROL MODULE

The control module controls and monitors operation of the Fuel Fired Booster Heater

(FFBH) system. Power for the control module is provided by a permanent feed from the

Quiescent Current Control Module (QCCM) integrated in the Rear Junction Box (RJB). A

Local Interconnect Network (LIN) bus connection provides the communication link

between the control module and the Automatic Temperature Control Module (ATCM).

The control module also has:

a ground connection

power feed and ground connections with the FFBH coolant pump

a power feed connection with the FFBH fuel pump

a signal line connection with the FFBH receiver (vehicles with timed climate control

only).

 

The Quiescent Current Control Module (QCCM) integrated into the Rear Junction Box

(RJB) disconnects the power supply to the FFBH.

For additional information, refer to: Battery and Cables (414-01 Battery, Mounting

and Cables, Description and Operation).

 

The D5 has a fuel based booster heater???
As in like a diesel cabin heater type of thing?

 

I really don’t know anything about it. Just took info from shop manual

 

Yes on the Diesel models and not available in the US.

 

Makes sense it would be on the diesel models, but as I hadn’t heard about it I guess that’s because I’m in the US and we don’t have it anyway as you say...

 

hotted day of year and my a/c goes all wonky and the engine light comes on. Any ideas?

 

What are the codes from the OBD?

 

Code is: B1412-96. quiescent current control module internal failure.