Operation CHARM: Car repair manuals for everyone.
Home >> Ford >> 2008 >> F 450 4WD Super Duty V10-6.8L >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Information Bus >> Testing and Inspection >> Pinpoint Tests >> Test I: The Driver Seat Module (DSM) Does Not Communicate With The Scan Tool
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Test I: The Driver Seat Module (DSM) Does Not Communicate With The Scan Tool

PINPOINT TEST I: THE DRIVER SEAT MODULE (DSM) DOES NOT COMMUNICATE WITH THE SCAN TOOL

Normal Operation
The driver seat module (DSM) is optional equipment. The DSM communicates with the scan tool through the medium speed controller area network (MS-CAN). Circuits VDB06 (GY/OG) (MS-CAN +) and VDB07 (VT/OG) (MS-CAN -) provide the network connection to the DSM. The DSM shares the MS-CAN network with the smart junction box (SJB), electronic automatic temperature control (EATC) or electronic manual temperature control (EMTC) module, audio control module (ACM), DVD player (if equipped), satellite digital audio receiver system (SDARS) module (if equipped) and the instrument cluster. Voltage for the DSM is provided by circuits SBP12 (GN/RD) and SBB45 (GY/RD). Circuits GD133 (BK) and GD179 (BK/VT) provide ground.

This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- DSM


I1-I2:






I2-I4:




pro multis · About Operation CHARM