21-070-15

Flash: PTU Motor Position Enhancements This bulletin involves updating the software in the Power Transfer Unit (PTU), Rear Driveline Module (RDM) and Drivetrain Control Module (DTCM). A customer with a KL vehicle may experience difficulty shifting out of 4 Wheel Low (4WL). A customer with a UF vehicle may experience All Wheel Drive (AWD) not operating correctly. On further inspection the Technician may find one or more of the following Diagnostic Trouble Codes (DTCs): ? C1494-92-PTU Fork Position - Performance or Incorrect Operation. ? C1499-92-RDM Motor Position - Performance or Incorrect Operation. ? C1496-92-PTU Motor Position - Performance or Incorrect Operation.