Solution K93830098
Tuesday, February 6, 2018 9:45:11 PM CET

Solution
Title (customer effect)

Volvo Chassis - Aftertreatment Control Module ( ACM ) Not Visible / Missing From
Control Unit Information in Premium Tech Tool ( PTT )

Cause

When connecting to a chassis for diagnosis or programming, the ACM may not be
visible. This is not an immediate indication of a failed module. Most ACMs replaced for
this issue are found to be in working condition during failure analysis.

Solution

A. When replacing an ACM, always use Replace Hardware, operation 1700-22-03-12.
B. Review the DTC Readout for communications codes that may indicate a data link
problem.
C. Ensure that there are no voltage or resistance issues with power and ground to the
module.
- Ensure that there are at least 12 volts present on ACM pin 3 with Key On.
D. Unplug the ACM. Allow the chassis to sit with key on, engine off for 15 minutes.
Reconnect the ACM without turning the key off.
E. Make sure that the ACM is compatible with the truck.
- OBD13 to OBD15 (Model Years 2014 to 2016) have two compatible modules:
• 21870087
• 22449432
- OBD16 and newer is only compatible with one module:
• 22449432
F. Make sure to disconnect any third party devices (GPS, QUALCOMM etc.) that are
connected anywhere to the data link, possibly on the diagnostic connector (back side).
G. Make sure Tech Tool is at version 2.5.87 or newer. Tech Tool databases are up to
date (when in doubt use the Update Product Information function).
H. Remove the fuses for the TGW and ABS modules. This should only be required if
there are issues with programming a module for the first time. Follow the procedure in
Step H to ensure PTT has to re-identify the vehicle.
I. If the original ACM is not visible in Tech Tool, make sure to do the following steps to
clean the history of the truck inside tech tool:
1. Disconnect from the truck and then remove the truck from the latest
selections list.
2. Exit out of PTT.
3. Using the Tech Tool Log Manager, stop the BAF services, clean up all log
files and then start the BAF services.
4. Restart PTT and connect to the truck.

J. If the ACM is still not visible, start an eService case for further assistance. The case
must include:
• A complete DTC Readout from the time of the truck's arrival.
• A thorough description of all tests performed with results and
numeric values noted ("Good" is not a value).
• Screenshots of any errors encoutered while attempting to program.
Internal comments (BO)

Before shipping the pre-programmed ACM, the following steps can be performed to
allow the programming of the ACM.
1. Disconnect 62 PIN connector at the ACM
2. Eliminate J1939 communication by using either of the procedures attached here.
3. Connect 62PIN connector at the ACM.
4. Program ACM using TT2.
5. If " ONLY " the ACM is still not visible, order a pre-programmed ACM through
Volvo Action Services ( VAS ).

Solution visibility

Dealer distribution

Function(s)/component(s) affected
Function affected

CV electronic control unit , 2 1 0 ACM , Diagnostic tool

Function Group
Function Group

258 emissions after-treatment , 2841 Electronic Control Unit

Customer effect
Main customer effect

calibration/programming/pairing/missing operation , diagnostics/methodology

Conditions
Vehicle operating mode

when stationary

Administration
Author

ut0031h

Last modified by

RU4469V

Creation date

21-11-2016 22:11

Date of last update

02-02-2018 20:02

Review date

15-02-2017 00:02

Status

Published

Average score

0

Number of scores

1

NA_Author_Group

GTT

NA_VOLVO_Vehicle_Range
NA_VOLVO_Vehicle_Ra
nge

Engine family

Conventional

Engine family

Volvo , 11L Engine , 13L Engine , 16L Engine

Emission Standard
Emission Standard

2018 , OBD2017 , US17 GHG , US16 , US15 , US10 , US13 OBD , US14 GHG