SSM74799

Special Service Message
NOTE: A Special Service Message is a formal communication issued by Land Rover and carries the
same importance of a Technical Service Bulletin. An SSM is a quick method of communicating
"Need To Know" information to the technical service community. SSM's may be issued in advance
of a technical bulletin or may be the only communication on a given topic. All information
contained in Land Rover technical communications are intended for use by trained, professional
technicians with the knowledge, tools, and equipment required to complete the procedure
correctly and safely. It informs the Technicians of conditions that may occur on some vehicles, or
provides information that could assist in correct vehicle and diagnostic service.
SSM 74799 - L405 L494 L462 MIL on whilst
driving - P0496-00
Models : Discovery / L462
Range Rover / L405
Range Rover Sport / L494
Engineer :Shilvock Matthew
Date Last 23 APR 2020 15:34:50
Updated :
Content :Affected Carlines – L405, L494, L462
Engine Variant – AJ126
Affected MY- 2 0 M Y
Issue: MIL on when vehicle in driving. DTC P0496-00 indicated EVAP (Evaporative
Emission Canister purge) purification flow is too high.
Cause: MIL On due to system diagnosing excessive pressure drop between fuel
tank and purge valve. Monitor designed to diagnose a stuck open purge valve or
leak between fuel tank and purge valve.
ACTION
To fix this issue, a PCM calibration update is required and the instructions can be
completed as below
Complete the instructions detailed below:
This Manual Patch will stay on the JLR Approved Diagnostic Equipment.
NOTE: When an update been applied to the JLR Approved Diagnostic Equipment,
this Manual Patch will need to be re-applied until the permanent corrective action
is delivered.
To apply the Manual Patch please, complete the instructions carefully.
1 . Restart the JLR Approved Diagnostic Equipment
2 . Make sure Symptom Driven Diagnostics (SDD) and PATHFINDER are closed.
Then select the ‘Manual Patch’ Icon on the Application Launcher screen. You
will see a pop-up for the Manual Patch downloader.
3 . Enter ‘MP_PF_ER_J0023’ in the ‘Patch Name’ field.
4 . Select ‘Start’ and the Manual Patch will download.
5 . Select ‘Yes’ when the patch download is finished.
6 . Start a new session.
7 . Select ECU Diagnostics.
8 . Select Powertrain Control Module (PCM).
9 . Select Update ECU.
NOTE: With this manual patch installed and after updating the PCM software, the
PCM Assembly part numbers shown on PATHFINDER (Software parts) may display
the Assembly part number as not up to date and the ECU Calibration Data #1
Number as up to date, this is correct, do not select Update ECU again.
Version : 1
Jaguar Land Rover Limited 2000 - 2020 (Rel. 2678)