June 3, 2021 NHTSA CAMPAIGN NUMBER: 21V424000
PCM May Switch Off and Cause Engine Stall
An engine stall can increase the risk of a crash.
NHTSA Campaign Number: 21V424
Manufacturer Jaguar Land Rover North America, LLC
Components POWER TRAIN, ELECTRICAL SYSTEM
Potential Number of Units Affected 163
Summary
Jaguar Land Rover North America, LLC (Land Rover) is recalling certain 2020-2021 Land Rover Defender vehicles equipped with 6-cylinder engines. The Powertrain Control Module (PCM) may unexpectedly switch off while the vehicle is in motion, resulting in an engine stall with no warning.
Remedy
The Connected Diagnostic Services (CDS) and the Over-the-air (OTA) diagnostics functionality will be disabled, either by a dealer or through an OTA update, free of charge. Owner notification letters are expected to be mailed July 30, 2021. Owners may contact Land Rover customer service at 1-800-637-6837. Land Rover's number for this recall is N599.
Notes
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.nhtsa.gov.
Check if your Land Rover has a Recall
573.6 (c) (6) - Chronology of Events (Recall N599)
A Product Safety and Compliance Committee (PSCC) Investigation was opened on March 26, 2021 following a number of Electronic Product Quality Reports (EPQR) received from the market of cut out while in motion. The PSCC directed an engineering team to investigate the issue to discover possible causes and scope of this issue along with identification of vehicles which may be affected.
The engineering team reported back to the PSCC during March and April 2021 with their initial findings which indicated that in-field updates made to enable the Connected Diagnostic
Services (CDS) vehicles post-production was under review. Interrogation of Jaguar Land Rover‘s information systems seeking to locate the presence of DTC P0606, an indicator of an occurrence, was completed.
Part of the engineering investigation extended to the interaction of the CDS, the Diagnostics Over the Air (DOTA) functionality and its interaction with other vehicle systems. This included sending an instruction to disable the CDS function though a SOTA campaign to allow better understanding of the means by which the DOTA activity operates. The population of vehicles where DOTA was enabled was approximately 31,000 vehicles in the United States and Canada. This activity was completed mid-April 2021.
The engineering investigation also sought to define what triggers were needed, and any sequence of events required, to introduce the conditions where the PCM would unexpectedly switch off.
At the end of April 2021, a data review was requested to understand the current state of reports and then determine the presence of a pattern or trend. This review was completed and reported out in early May at the Product Safety and Compliance Committee (PSCC). The entry conditions and triggers for the engine cut out were established through testing and recognized as being a consequence of a software watch-dog in the PCM. Where the CDS sought to read DTC’s in the PCM, the PCM run time increased triggering the watch-dog. This increased runtime can, where it exceeds 10ms, triggers the PCM to switch off.
The PSCC reviewed the trend data and scope of the concern and progressed the issue to the Recall Determination Committee (RDC).
The RDC reviewed all information available on May 26, 2021. The RDC acknowledged during the investigation phase, a number of vehicles with the SOTA capability had received a CDS Turn Off instruction through SOTA which is now understood to remove the issue. RDC concluded that for those vehicles where the CDS Turn Off instruction is known not to have been successfully transacted, the issue represents an unreasonable risk to safety and that a voluntary safety recall be conducted.
There have been no reported accidents, injuries or fires as a result of this concern.
2 Affected Products
Vehicle
| MAKE | MODEL | YEAR |
| LAND ROVER | DEFENDER | 2020-2021 |
3 Associated Documents
Recall Acknowledgement
RCAK-21V424-1906.pdf 646.223KB
RCAK-21V424-1906Defect Notice 573 Report
RCLRPT-21V424-4152.PDF 215.004KB
RCLRPT-21V424-4152Chronology
RMISC-21V424-7382.pdf 48.888KB
Latest Recalls Documents
https://www-odi.nhtsa.dot.gov/acms/cs/documentList.xhtml?docId=21V424&docType=RCL
For the most up to date documents from NHTSA for this Recall, click the lick above
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Last update on 2021-12-04 / Affiliate links / Images from Amazon Product Advertising API
Last update on 2021-12-04 / Affiliate links / Images from Amazon Product Advertising API
