JLRTB02084NAS1

7/14/2021
TECHNICAL BULLETIN
JLRTB02084NAS1
TECHNICAL BULLETIN
14 JUL 2021
© 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.
INFORMATION
SECTION:
417-01
SUBJECT/CONCERN:
Trailer Lamps Not Operating as Expected
AFFECTED VEHICLE RANGE:
MODEL:
MODEL YEAR:
VIN:
ASSEMBLY PLANT:
F-PACE (X761)
2021 Onwards
661715 Onwards
Solihull
I-PACE (X590)
2021 Onwards
F88796 Onwards
Graz (Austria)
Range Rover Velar (LY)
2021 Onwards
295464 Onwards
Solihull
Discovery (LR)
2021 Onwards
441461 Onwards
Nitra (Slovakia)
MARKETS:
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NORTH AMERICA
CONDITION SUMMARY:
SITUATION:
The trailer lamps may not operate as expected. The trailer turn signal indicator on the
Instrument Panel Cluster (IPC) will not be illuminated if the trailer turn signal lamps are not
operating. For all other trailer lamps, any failure can only be observed by a visual inspection
of the trailer lamps.
CAUSE:
If any of the trailer lamp circuits are loaded to their maximum rating with incandescent
bulbs, the trailer lamp circuits will shut down.
ACTION:
Follow the instructions below.
TOOLS:

Jaguar Land Rover (JLR)
approved diagnostic equipment

JLR approved battery support
unit
WARRANTY:
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NOTE:
* When submitting your Warranty claim within the Warranty portal, use the
Condition Code list shown to select the Condition Code which best describes the
vehicle defect.
NOTES:
Repair procedures are under constant review, and therefore times are subject to
change; those quoted here must be taken as guidance only. Use TOPIx 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
JLRTB - Tow Bar Control Module Update ECU
SRO
TIME
(HOURS)
CONDITION
CODE
CAUSAL PART
85.86.44
0.2
*
LR129345/J9C17243
NOTE:
Normal Warranty procedures apply.
DIAGNOSTIC INSTRUCTION
1.
CAUTIONS:
This procedure requires a minimum of Pathfinder 331 installed or later.
All ignition ON/OFF instructions must be followed. Failure to complete
these instructions may cause damage to the vehicle control modules.
NOTE:
The JLR approved diagnostic equipment will read the Vehicle Identification
Number (VIN) for the vehicle and automatically take the vehicle out of
‘Transportation Mode’ if required.
Connect the JLR approved battery support unit.
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2.
Connect the JLR approved diagnostic equipment to the vehicle and begin a new
session.
3.
Follow the JLR approved diagnostic equipment prompts.
Select 'ECU Diagnostics'.
Select 'Trailer Control Module [TRM]'.
Select 'Update ECU'.
Follow all on-screen instructions to complete the task.
4.
If required, reset the vehicle to ‘Transportation Mode’.
5.
When all of the tasks are complete, exit the session.
6.
Disconnect the JLR approved diagnostic equipment and the JLR approved battery
support unit.
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