Operation CHARM: Car repair manuals for everyone.
Home >> Volvo >> 2004 >> S40 L5-2.4L VIN 38 B5244S4 >> Repair and Diagnosis >> Steering and Suspension >> Steering >> Steering Mounted Controls Communication Module >> Testing and Inspection >> Pinout Values and Diagnostic Parameters >> Signal Specification, Steering Wheel Module (SWM)
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

Signal Specification, Steering Wheel Module (SWM)






Signal specification

Signal specification

Connector D




All the values given below are between the respective terminal in column 1 and terminal #C4 (ground) unless otherwise stated in brackets after the table entry.

General
UIlow, voltage close to 0 V.
UIbat, battery voltage.

Note! It is important to connect the breakout box and check ground terminals before reading off.





Connector C




Connector C






Connector AB





Warning! Never take a reading using an ohmmeter or other measuring instrument on a connector for a pyrotechnical airbag. This could deploy the airbag!





pro multis · About Operation CHARM