Jeep Grand Cherokee 2021 — technical service bulletin
Bulletin 9004407 · NHTSA communication 10221361 · issued Jun 8, 2022
Technical service bulletin
communication type
Suspension
component
2021
model years
1
vehicle entries
Official summary
COMPRESSOR ASSEMBLY, Air Suspension, Module ASCM replacement is rarely necessary. If any DTC is stored and able to be cleared, component replacement is not necessary. Please follow the service procedures to attempt to clear any active fault(s) which includes module hard reset, full CAN power down/sleep, or DTC clear in WiTech. Please contact FCA Redacted Content prior to any ASCM replacement at FCA Redacted Content If no response in 15 minutes, proceed with repair. Any new module requires a flash following installation regardless of whether the current part number is up-to-date .
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.