Some owners of 2015 Jaguar F-Type, XE, XF and XJ vehicles may report that while pressing the Auto Stop/Start button, a warning message (“Auto Stop/Start not available”) may be displayed in the instrument cluster.
Some owners of 2015 Jaguar F-Type, XE, XF and XJ vehicles may report that while pressing the Auto Stop/Start button, a warning message (“Auto Stop/Start not available”) may be displayed in the instrument cluster. DTC B12CD-87 will be logged in the gateway module (GWM).
The ignition live input into the vehicle quality module (VQM) may have a poor connection, and/or no LIN circuit between the VQM and GWM.
Check ignition live circuit into the VQM 6-way connector pin 2. Repair as required.
For F-Type and XJ...check the LIN circuit between the VQM 6-way connector pin 4 & pin 13 of the GWM. Repair the connector as required.
For XE and XF...check the LIN circuit between VQM 6-way connector pin 4 & pin 58 of the BCM (body control module). Repair as needed.
If these steps do not resolve the issue, replace the VQM.
Information for Technical Service Bulletins comes from ProDemand, Mitchell 1's auto repair information software for domestic and import vehicles. Headquartered in San Diego, Mitchell 1 has provided quality repair information solutions to the automotive industry since 1918.
Mike Mavrigian has written thousands of automotive technical magazine articles involving a variety ofspecialties, from engine building to wheel alignment, and has authored more than a dozen books that crisscross the automotive spectrum. Mike operates Birchwood Automotive, an Ohio shop that builds custom engines and performs vintage vehicle restorations. The shop also features a professional photo studio to document projects and to create images for articles and books.
