RAM
21-010-20
2020-02-15 · NHTSA 10173369
车型关联可作为查阅线索；具体发动机、生产范围和软件条件请核对厂商资料。
厂商摘要
以下为英文原文
Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the TCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find the following Diagnostic Trouble Code (DTC) has been set:P0731 - Gear Ratio Error In 1st. The customer may describe the following condition:Rough or harsh shifting during coastdown to a stop (might also be described as a 2-1 bump)(Sales Code EZH). In addition, the following software enhancements are also available:2-1 coast down improvement(Sales Code EXF). 3-2 coast down improvement(Sales Code EXF). Improvements to 5-3 downshift with pedal to improve 5-3-2 shifts(Sales Code EXF). 6-5 coast down improvement(Sales Code EXF). 2-3 upshift with less than 30% pedal(Sales Code EXF). Clutch C adaption stability (improves shift quality for new transmissions on gear shifts that use Clutch C)(Sales Code EXF). Garage shift to D improvements(Sales Code EXF). Rolling garage shift(Sales Code EXF). Implementation of End Of Line (EOL) adaption to improve shift quality on brand new transmissions. Diagnostics improvements(Sales Codes ERB, ERT and EZH). Improve shift quality on brand new transmission(Sales Code EZH). Improvement to first 1-2 shift after start(Sales Code EZH). Improvement to 1-2 shift, especially for colder operating temperatures(Sales Code EZH). 2-3 shift feel improvement especially for colder operating temperatures(Sales Code EZH). Coastdown shift improvements (6-5, 5-4, 4-3, 3-2 and 2-1)(Sales Code EZH). Coastdown shift feel refinement for double downshifts(Sales Code EZH). Kickdown improvements for the following shifts (7-6-5-4-3, 8-6-5-4, 6-3-2, 5-3-2 and 4-2)(Sales Code EZH). Improvement to 4-2-1(Sales Code EZH). Improved 7th gear upshift timing. Downhill engine braking improvements.
NHTSA 厂商通报资料 ↗仅当厂商、通报编号、发布日期和完整摘要一致时，重复登记才会合并展示，原始编号仍予保留。旧资料继续供查阅；确认明确替代关系后才标示后续版本。1994 年以前的车辆关联与默认结果分开显示；未注明年款不等于适用于所有年款。