Description and Operation of the Two-BOX (2V2) Aftertreatment
Control Module
The Aftertreatment Control Module (ACM) controls all aftertreatment functions. It is mounted on the vehicle
chassis in a protected area. Temperature, pressure, and NOx sensors connect to the ACM in addition to
aftertreatment components. The ACM uses the inputs from the sensors to control the aftertreatment systems.
Vehicle electrical harnesses run throughout the vehicle to connect the ACM to all aftertreatment components and
sensors.
Removal of the Two-BOX (2V2) Aftertreatment Control Module
Note : Typically the Aftertreatment Control Module (ACM) is mounted just behind the driver’s side fender.
1. Disconnect the batteries. Refer to OEM procedures
2. If necessary, remove the driver’s side fairing.
3. Remove the two bolts securing the ACM cover and remove cover.
4. Release latch on harness connector to remove the 21-pin (3) and the 120-pin (2) connectors from the ACM.
5. Remove the four mounting bolts (1) securing the ACM; remove ACM along with the isolators.
Inspection of the Aftertreatment Control Module
Inspect as follows:
1. Inspect the 21-pin (1) and 120-pin (3) connectors on the Aftertreatment Control Module (ACM) for damaged
or bent pins. Repair as needed.
2. Inspect the 21-pin (1) and 120-pin (3) connectors on the ACM affected harness for moisture or water
intrusion. If moisture or water intrusion is found the coinciding harness should also be replaced.
3. Inspect the 21-pin (1) and 120-pin (3) connectors on the ACM for contamination. The source of
contamination must be fixed to ensure a proper repair.
4. Ensure there is no physical damage to the ACM 21-pin (1) or 120-pin (3) or connector bodies. Replace as
needed.
5. Inspect the eight ACM isolators (4) for damage. Replace as needed.
Installation of the Two-BOX (2V2) Aftertreatment Control Module
1. Confirm that vehicle battery power is disconnected and the ignition is in the OFF position.
2. Install the ACM with four bolts (1) and isolators. Torque the bolts to 15 N·m (11 lb·ft).
3. Connect the 21-pin (3) and 120-pin (2) harness connectors to the ACM. Close and lock the latch on the
connectors.
4. Install the ACM cover with the two bolts. Torque the bolts to 18 N·m (13 lb·ft).
5. Connect the batteries. Refer to OEM procedures
6. If removed, install the driver side fairing. Refer to OEM procedures.
7. Is the MCM being installed a replacement MCM?
7.a Yes; using DiagnosticLink , program the MCM to the correct configuration. After programming, perform
an Accumulated Fuel Mass Sync. For more information, reft to the DiagnosticLink help menu.
Afterwards, Go to step 8.
7.b No; Go to step 8.
8. Turn the ignition ON (key ON, engine OFF). Observe the DiagnosticLink® for any diagnostic code(s). If any
code(s) are logged, refer to the proper code diagnostics.