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N151NAS3 - Service Action: HVAC Control Module Update | TOPIx

N151NAS3

TECHNICAL BULLETIN
18 JUL 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

Changes are highlighted in blue

SECTION:
412-01: Climate Control

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S U B J E C T/ C O N C E R N :
Service Action: HVAC Control Module Update

AFFECTED VEHICLE RANGE:
MODEL:
Discovery (LR)

MODEL YEAR:
2017-2018

VIN:
000532-034333

ASSEMBLY PLANT:
Solihull

MARKETS:
NORTH AMERICA

CONDITION SUMMARY:

SITUATION:
An issue has been identified on certain vehicles within the listed Affected Vehicle Range where the direct pressure sensing valve within
the air conditioning compressor becomes 'stuck' and cannot respond to changing demands for air conditioning compressor
displacement. The vehicle continues to operate; however, the function of the climate system is compromised by the failure mode. The
customer may report a number of symptoms: cycling temperature within the passenger compartment, too cold, too hot, and odor
ingress may occur.
ACTION:

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Retailers are required to HOLD affected new vehicles that are within your control and refrain from releasing the vehicles for new vehicle
sale pending completion of the Workshop Procedure detailed in this Technical Bulletin. Unsold vehicles should have this performed as
part of the Pre-Delivery Inspection (PDI) process but must have it completed prior to vehicle handover to the customer.
Affected vehicles already in the hands of customers should be updated at the next available opportunity.

PA RTS :
No parts required.

SPECIAL TOOLS:
Jaguar Land Rover-approved Midtronics Battery Power Supply
Jaguar Land Rover-approved diagnostic tool with latest PATHFINDER software

WARRANT Y:

NOTE:
Check DDW to make sure that a vehicle is affected by this program prior to undertaking any rework action.
At the time of confirming a booking for vehicle repair, make sure that all outstanding Recall and Service Actions are identified to ensure
the correct parts are available and adequate workshop time is allocated for repairs to be completed at one visit.
Warranty claims must be submitted quoting the Program Code and the relevant Option Code; this will result in payment of the stated
time. The SRO and parts information is included for information only. The Option Code(s) that allows for the drive in/drive out allowance
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may only be claimed if the vehicle is brought back into the workshop for this action alone to be undertaken.
Repair procedures are under constant review and therefore times / prices are subject to change; those quoted here must be taken as
guidance only. Refer to TOPIx to obtain the latest repair time.
This program is valid for a limited time only. Warranty claims with a repair date prior to the 31 January 2020 closure date must be
submitted or payment within 30 calendar days of completion of the repair.
PROGRAM
CODE

OPTION
CODE

DESCRIPTION

N151

B

Configure Existing HVAC Control
Module

N151

C

Configure Existing HVAC Control
Module
Drive In/Drive Out

SRO

TIME (HOURS)

PARTS/SUNDRY CODE

QTY./VALUE

85.80.02

0.2

-

-

85.80.02
02.02.02

0.2
0.2

-

-

Normal Warranty policies and procedures apply.

DIAGNOSTIC PROCEDURE:

CAUTIONS:
A Jaguar Land Rover-approved Midtronics battery power supply must be connected to the vehicle battery during diagnosis /
module programming.
All ignition ON/OFF requests must be carried out; failure to perform these steps may cause damage to control modules in the
vehicle.
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N151NAS3 - Service Action: HVAC Control Module Update | TOPIx

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

NOTE:
The Jaguar Land Rover-approved diagnostic tool must be loaded with PATHFINDER version 170 (or later).
Connect the Jaguar Land Rover-approved diagnostic tool to the vehicle and begin a new session.

3

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

4

Select ECU Diagnostics.

5

Select HVAC Control Module [HVAC].

6

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

7

Return to the previous screen.

8

Select ECU Diagnostics.

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Select Run in air conditioning compressor.
1 Follow all on-screen instructions until the application completes successfully.
2 When all tasks are complete, go to the next Step.

10

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

11

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

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