Description and Operation of the 1-BOX™ Aftertreatment Contol
Module
The Aftertreatment Control Module (ACM) controls all aftertreatment functions. It is mounted on the 1-BOX™
configuration. 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 1-BOX™ Aftertreatment Control Module
Note : The Aftertreatment Control Module (ACM) is mounted on the rear of the 1-BOX assembly.
1. Shut off engine and apply the parking brake, chock the wheels, and perform any other applicable safety
steps.
2. Disconnect the batteries. Refer to Original Equipment Manufacturer (OEM) procedures.
3. If necessary, remove the passenger side fairing. Refer to OEM procedures.
4. Remove the lower ACM cover mounting bolts (1) and remove the cover (2).
5. Note the location of the zip ties mounting the ATS harness to the ACM.
6. Remove the zip ties mounting the Aftertreatment System (ATS) harness to the ACM.
7. Release latch on harness connector to remove the 21-pin (1) and the 120-pin (4) electrical connectors from
the ACM.
8. Disconnect the Soot Sensor Control Unit (SCU) electrical connector (5).
9. Remove the Soot SCU mounting bolts (2) and remove the SCU (6).
Note : If replacing the ACM, remove the Soot SCU, mounting bracket and bolts.
10. Remove the four mounting bolts (3) 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 1-BOX™ Aftertreatment Control Module
1. Install the Aftertreatment Control Module (ACM) with four mounting bolts (3) and eight isolators. Torque the
bolts to 15 N·m (11 lb·ft).
Note : If replacing the ACM, install the Soot Sensor Control Unit (SCU) mounting bracket with new bolts.
2. Install the Soot SCU (6) and torque the mounting bolts (2) to 12 N·m (9 lb·ft).
3. Connect the Soot SCU electrical connector (5).
4. Connect the 21-pin (1) and 120-pin (4) electrical connectors to the ACM. Close and lock the latch on the
connectors.
5. Install the zip ties that mount the Aftertreatment System (ATS) harness to the ACM.
6. Install the lower ACM cover (2) with the six mounting bolts (1). See graphic below. Torque the bolts to 10
N·m (7 lb·ft)
7. Connect the batteries. Refer to OEM procedures.
8. If removed, install the passenger side fairing. Refer to Original Equipment Manufacturer (OEM) procedures.
9. Is the MCM being installed a replacement MCM?
9.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 10.
9.b No; Go to step 10.
10. Turn the ignition ON (key ON, engine OFF). Observe DiagnosticLink® for any diagnostic code(s). If any
code(s) are logged, refer to the proper code diagnostics.