Reprogramming Ram ASCM software

Jan. 23, 2024
This bulletin applies to reprograming the ASCM on 2019-2022 RAM 2500 and 3500 trucks equipped with auto-level rear air suspension.

This bulletin applies to reprograming the ASCM on 2019-2022 RAM 2500 and 3500 trucks equipped with auto-level rear air suspension. Customers may experience a MIL on, The following DTCs may be set:

- U0132 (loss of communication with air suspension control module)

- C15E1-97 (left rear air spring intake – component or system operation obstructed or blocked)

- C220C-48 (active suspension module internal-supervision software failure...2019 only)

- C211B-92 (ignition run/start input-performance or incorrect operation ...2019 only)

- C156C-7A (ride height system air leak-fluid leak or seal failure...2019 only)

In addition, the customer may describe:

- The air suspension system is inoperable

- During key ON or while driving, the “service air suspension” message appears for 5 seconds.

- Air spring deflated or ruptured.

- Right/left rear suspension sits lower than the opposite side.

- Chime and “service air suspension immediately” message in cluster for five seconds.

- Excessive operation or noise from air suspension system when vehicle is stationary (2019 only).

- “Air suspension disabled” message when attempting bed lowering lode (2019 only).

- Excessive compressor valve cycling following a cold start (2019 diesel only).

- Erroneous “bed low achieved” message when requesting lowering, even though the truck did not actually lower.

- Ride height changes/valve actuation without operator request on rough roads.

Reprogram the ASCM with the latest software.

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