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LTB01202NAS2 - 'Traction Reduced' Message Displayed / DTC U2000-4B Stored | TOPIx

LT B 0 1 2 0 2 N A S 2

TECHNICAL BULLETIN
21 AUG 2018

© Jaguar Land Rover North America, LLC
NOTE: The information in Technical Bulletins is intended for use by trained, professional Technicians
with the knowledge, tools, and equipment required to do the job properly and safely. It informs these
Technicians of conditions that may occur on some vehicles, or provides information that could assist in
proper vehicle service. The procedures should not be performed by 'do-it-yourselfers'. If you are not a
Retailer, do not assume that a condition described affects your vehicle. Contact an authorized Land
Rover service facility to determine whether this bulletin applies to a specific vehicle.

I N F O R M AT I O N

This reissue replaces all previous versions. Please destroy all previous versions.
Changes are highlighted in blue

SECTION:
205-02

S U B J E C T/ C O N C E R N :
'Traction Reduced' Message Displayed / DTC U2000-4B Stored

AFFECTED VEHICLE RANGE:
MODEL:
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MODEL YEAR:

VIN:
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LTB01202NAS2 - 'Traction Reduced' Message Displayed / DTC U2000-4B Stored | TOPIx

MODEL:

MODEL YEAR:

VIN:

Discovery (LR)

2017-2018

000001-071805

Range Rover Velar (LY)

2018

700000-773133

Range Rover Sport (LW)

2017-2018

124031-804795

Range Rover (LG)

2017-2018

320324-506030

MARKETS:
NORTH AMERICA

CONDITION SUMMARY:

SITUATION:
A 'Traction Reduced' warning message may be displayed on the Instrument Cluster and a 'juddering'
noise may be heard when the steering is in the full lock position, such as during low-speed maneuvers
and parking. Upon further diagnosis, the technician may find DTC (Diagnostic Trouble Code) U20004B stored in the Rear Differential Control Module (RDCM).
CAUSE:
This may be caused by a hardware variability incompatible with software.
ACTION:
Should a customer express this concern, follow the Diagnostic Procedure below.

PA RTS :
No Parts Required

TOOLS:

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


Jaguar Land
Rover-approved
Midtronics battery
power supply

Jaguar Land
Rover-approved
diagnostic
equipment with
the latest
PATHFINDER
software

WARRANT Y:

NOTES:
Repair procedures are under constant review, and therefore times are subject to change;
those quoted here must be taken as guidance only. Always refer to JLR claims submission
system to obtain the latest repair time.
The JLR Claims Submission System requires the use of causal part numbers. Labor only claims
must show the causal part number with a quantity of zero.

DESCRIPTION
Update ECU - Rear Differential Control Module
(RDCM)

SRO
51.90.02

TIME
(HOURS)
0.2

CONDITION
CODE
04

CAUSAL
PART
LR086488

NOTE:
Normal Warranty procedures apply.

DIAGNOSTIC PROCEDURE:

CAUTIONS:

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A Jaguar Land Rover-approved Midtronics battery power supply must be connected to the
vehicle startup battery during diagnosis / module programming.
All ignition ON/OFF requests must be performed. Failure to do these steps may cause
damage to control modules in the vehicle.

NOTE:
Use the Jaguar Land Rover claims submission system to for Field Service Action program
eligibility requiring a Rear Differential Control Module (RDCM) software update. If eligible,
perform and claim the update as per that program using the latest PATHFINDER software.
1

Connect the Jaguar Land Rover-approved Midtronics battery power supply to the vehicle
startup battery.

2

NOTE:
The Jaguar Land Rover-approved diagnostic equipment must be loaded with
PATHFINDER version 181 (or later).
Connect the Jaguar Land Rover-approved diagnostic equipment to the vehicle and begin a
new session.

3

NOTE:
The Jaguar Land Rover-approved diagnostic equipment will read the correct Vehicle
Identification Number (VIN) for the current vehicle and automatically take the vehicle
out of Transit mode if required.
Follow all on-screen instructions.

4

Select ECU Diagnostics.

5

Select Rear Differential Control Module (RDCM).

6

Select Update ECU.

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1 Follow all on-screen instructions until the application completes successfully.
2 When all tasks are complete, go to the next Step.
7

Exit the current session.
1 If required, reset the vehicle to Transit mode.
2 Select the Exit icon.

8

Disconnect the diagnostic equipment and battery power supply from the vehicle.

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