Instrument Cluster, ICU3
Driver-Side Dash Frame Assembly
Self-Tapping Screw
Wing Dash Frame Assembly

f548451

6. HVAC Control Head Assembly
7. Passenger-Side Dash Panel
8. Lower Dash Panel
9. Top Cover Panel
10. Dash Tray Assembly
Fig. 4, Dash Components

Page 9

Daimler Truck
North America LLC

Field Service Campaign

January 2024
SF679A-D
(Revised February 2024)
3.

Remove the common powertrain controller (CPC) from the CPC bracket and put it aside. See Fig. 5.

2

3
1
01/04/2024

f548452

1. Gateway
2. CPC Controller

3. CPC Bracket

Fig. 5, CPC Module and Bracket

Page 10

Daimler Truck
North America LLC

Field Service Campaign

January 2024
SF679A-D
(Revised February 2024)

4.

Remove the CPC bracket from the dash assembly. See Fig. 6.
2

3
1

2

01/04/2024

f548453

1. CPC Bracket
2. Fasteners (qty. 3)

3. Wing Dash

Fig. 6, CPC Bracket

5.

Write down the ‘Zonar GPS ID#’ on the label at the back of the VT unit. This will be needed later in the
validation procedure.

Page 11

Daimler Truck
North America LLC

Field Service Campaign

January 2024
SF679A-D
(Revised February 2024)
NOTE: The VT module, shown in Fig. 7, is shown on the back side of the CPC bracket.
6.

Use the hook and loop tape to install the VT module on the backside of the CPC bracket. See Fig. 7.

2
3

6

3

1

7
4
5
01/04/2024

f548454

1. Hook and Loop Tape
2. CPC Bracket
3. VT Module

4. 4-Pin Connector
5. 10-Pin Connector
6. CPC

7. Zip Tie

Fig. 7, VT Module Installation on the CPC Bracket

7.

Locate the 10-pin and 4-pin electrical connectors, and attach them to the VT module, as shown in Fig. 8.

8.

Install the CPC bracket on the dash assembly.
3

1

4

2

01/04/2024

1. Gateway
2. VT Module

f548455

3. Wing Dash
4. CPC Bracket

Fig. 8, VT Module Installation on the Back Side of the
CPC Bracket

9.

Install the CPC on the CPC bracket.

10.

Use zip ties to secure both the VT module and the CPC to the CPC bracket, as shown in Fig. 8.

11.

Install the dash panels. For instructions, see Group 60 of the applicable workshop manual.

12.

Go to the validation procedure (on page 18) to confirm the VT module communicates with the vehicle.

Page 12

Daimler Truck
North America LLC

Field Service Campaign

January 2024
SF679A-D
(Revised February 2024)

SF679C (Western Star 4700/4900/6900) – Installation of the Virtual
Technician (VT) Module
1.

Check the base label (Form WAR259) for a completion sticker for SF679 (Form WAR261), indicating this
work has been done. The base label is usually located on the passenger-side door, about 12 inches (30
cm) below the door latch. If a completion sticker is present, no work is needed. If a completion sticker is
not present, proceed to the next step.

2.

Remove the right-hand side glove box/PDM3 cover panel, shown as item #4 in Fig. 9. For instructions,
see Section 60.06 of the 4700/5700/4900/6900 Workshop Manual.
2

3

1
4
6

5

04/02/2015

1. Main Dash Panel
2. Center Dash Panel
3. PDM Cover Panel

f611296

4. Glove Box/PDM3 Cover Panel
5. Climate Control Panel
6. Ignition Switch and Cigarette Lighter
Fig. 9, Dash Panel Layout

Page 13

Daimler Truck
North America LLC

Field Service Campaign

January 2024
SF679A-D
(Revised February 2024)
3.

Release the tangs and remove the PDM3, as shown in Fig. 10. Leave the PDM3 suspended by the harness.

1

2

3

04/01/2022

1. PDM1

f547783

2. PDM2

3. PDM3

Fig. 10, PDM Locations

NOTE: For clarity in power distribution module (PDM) identification, Fig. 10 shows the cover removed from
PDM1 and PDM2. It is only necessary to remove the panel covering the PDM3.
4.

Write down the ‘Zonar GPS ID#’ on the label at the back of the VT unit. This will be needed later in the
validation procedure.

Page 14

Daimler Truck
North America LLC

Field Service Campaign

January 2024
SF679A-D
(Revised February 2024)
5.

Install the VT module on the bracket accessed through the opening created by removing the PDM3. See
Fig. 11 and Fig. 12.

3
2

1

4

01/04/2024

f548456

1. VT Module
2. Bracket

3. Dash
4. HVAC

Fig. 11, VT Module Installation

3
2

1
4
01/04/2024

1. 4-Pin Connector
2. VT Module

f548457

3. 10-Pin Connector
4. Main Dash Harness

Fig. 12, Connecting the Harness Connectors to the VT
Module

6.

Locate the 10-pin and 4-pin electrical connectors, and attach them to the VT module, as shown in Fig. 12.

7.

Install the PDM3.

8.

Install the right-hand side glove box/PDM3 cover panel.

9.

Go to the validation procedure (on page 18) to confirm the VT module communicates with the vehicle.

Page 15

Daimler Truck
North America LLC

Field Service Campaign

January 2024
SF679A-D
(Revised February 2024)

SF679D (122SD) – Installation of the Virtual Technician (VT)
Module
1.

Check the base label (Form WAR259) for a completion sticker for SF679 (Form WAR261), indicating this
work has been done. The base label is usually located on the passenger-side door, about 12 inches (30
cm) below the door latch. If a completion sticker is present, no work is needed. If a completion sticker is
not present, proceed to the next step.

NOTE: The sunglasses pocket is located on the passenger side, near the center of the overhead console.
2.

Remove the two screws that attach the sunglasses pocket to the overhead console. Remove the sunglasses pocket. See Fig. 13.

01/04/2024

f548458

Fig. 13, Sunglasses Pocket Removal from the
Overhead Console

3.

Write down the ‘Zonar GPS ID#’ on the label at the back of the VT unit. This will be needed later in the
validation procedure.

Page 16

Daimler Truck
North America LLC

Field Service Campaign

January 2024
SF679A-D
(Revised February 2024)
4.

Use hook and loop tape (velcro) to install the VT Module on the overhead console in the location shown in
Fig. 14 and Fig. 15.

2

1

01/04/2024

f548459

1. VT Module

2. Sunglasses Pocket
Fig. 14, VT Module Installation in the Overhead Console

2
3

1

1

01/04/2024

f548460

1. Hook and Loop Tape
2. Overhead Storage Console
3. VT Module
Fig. 15, VT Module Installation

Page 17

Daimler Truck
North America LLC

Field Service Campaign

January 2024
SF679A-D
(Revised February 2024)
5.

Locate the 10-pin, 4-pin, and antenna connectors, and attach them to the VT module, as shown in Fig. 16.

5

4
3

1

6

2

01/04/2024

1.
2.
3.
4.
5.
6.

f548461

4-Pin Connector
Antenna Connectors
VT Module
Overhead Harness
Overhead Storage Console
10-Pin Connector
Fig. 16, VT Module Wiring Installation

6.

Install the sunglasses pocket on the passenger side of the overhead console.

7.

Go to the validation procedure (on page 18) to confirm the VT module communicates with the vehicle.

SF679A-D – Validating the Virtual Technician (VT) Module
Communicates with the Vehicle
1.

Connect the vehicle to DiagnosticLink®.

2.

Turn the ignition key to the ON position.

3.

Wait for all the modules to get connected, and make sure ‘J1939-74’ is visible and rollcalls in the ‘Connections’ window.

4.

Go to the ‘Identification’ tab, then select the ‘Standard’ tab.

Page 18

Daimler Truck
North America LLC

Field Service Campaign

January 2024
SF679A-D
(Revised February 2024)
5.

Scroll down to ‘J1939-74 – Communications Unit, Cellular,’ and check the ‘ECU Serial Number.’ See
Fig. 17.

A
B
C

D

01/04/2024

A.
B.
C.
D.

f121490

Go to the ‘Identification’ tab.
Select the ‘Standard’ tab.
Scroll down to ‘J1939-74 – Communications Unit, Cellular.’
Check the ‘ECU Serial Number.’
Fig. 17, Verifying VT Communication on J1939 Using DiagnosticLink

6.

The electronic control unit (ECU) serial number should match the Zonar GPS ID# on the label at the back
of the VT unit.
• If the ECU serial number matches the Zonar GPS ID# → Go to step 7.
• If the ECU serial number does not show a value, or if the VT module does not communicate →
Check the wiring connection at the VT module. If the problem persists, troubleshoot and repair as
needed.

7.

Disconnect the vehicle from DiagnosticLink.

NOTE: The customer must be reminded to operate the vehicle continuously for 20 minutes (key on, engine
running) for the Virtual Technician module to fully activate with Zonar’s servers.
8.

Clean a spot on the base label (Form WAR259), and attach a campaign completion sticker for SF679
(Form WAR261), indicating this work has been completed.

Page 19