A message came up stating that the battery strength in the smart key was low.
I changed the battery but the message remains. Any help appreciated

 

Try another one, could be a bad replacement battery.

 

Yep, definitely check the battery - don't know how long its been sitting on shelf.


Have you looked at the circuit board - is there any corrosion, oil, etc found on it? If so may need to clean and retry.


Also, keep the bulletin below in mind ...


JTB00075v2

TECHNICAL BULLETIN

12 JUN 2009







© Jaguar Land Rover Limited
All rights reserved.




Information




This reissue replaces all previous versions. Please destroy all previous versions.

This bulletin supersedes TSB JTB00075/2008 dated 04 JAN 2008, which should either be destroyed or clearly marked to show it is no longer valid (e.g. with a line across the page). Only refer to the electronic version of this Technical Bulletin in TOPIx.



SECTION:
418-00


Subject/Concern:
'Smart Key Battery Low' Displayed


AFFECTED VEHICLE RANGE:
Model:VIN:XK RangeB12815-B34241XFR00001-R53809

MARKETS:
All


CONDITION SUMMARY:

Situation:

'Smart Key Battery Low' message appears in the Instrument Cluster (IC) information center. This version has been issued for a change in the Cause, to extend the XK VIN range and to add the XF Model Range.
Cause:


The lower housing of the smart key has 3 pegs which support the internal circuit board. A concern with the manufacturing process has led to one of the support pegs being too short thus allowing the circuit board to flex when the function buttons are pressed.Suggested Customer Concern Code - L20.

Action:


Should a customer express concern, install a new smart key lower housing and battery. Follow the Service Instruction outlined below.




PARTS:
Part Number
Description
Quantity
C2P 17158
Smart key lower housing (including replacement battery)

1


WARRANTY:
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.

DESCRIPTIONSROTIMECONDITION CODECAUSAL PARTSmart key lower housing - Renew 86.93.870.2 hours42C2P 17158NOTE:
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.


SERVICE INSTRUCTION:

1. 
   
   Remove the Smart key blade by pressing the clip (see E91986).
   
2. 
   
   Remove both side chrome rings (one at a time), by inserting a small, flat-blade screwdriver between the cover and the body, and lightly twisting the screwdriver (see E91987).
   
3. CAUTION:
   Do NOT touch the green printed circuit board, battery, or the battery contacts (arrowed in E91988). Oil or any other contamination on either component can affect the Smart key performance.
   
   
   
   Pull apart the Smart key and discard the lower housing and battery.
   
4. Re-assemble the Smart key by reversing the procedure above, using the new lower housing and battery.

 

I've also had my fob battery low warning pop up when the main needed topped off. Night on the tender made the faults go away.

 

When installing a new CR2032 battery, check the metal prongs and make sure they make good contact with that battery.