2011 Volvo C70FACTORY OEM SERVICE PROCEDURE

System Overview: Signals

The table below summarizes the input signals to and output signals from the driver door module (DDM) and passenger door module (PDM). The signal types are divided into directly connected signals, LIN and CAN communication. The illustration below (Fig 1) displays the same information with the Volvo component designations.

Input signals Output signals
Directly connected:  Directly connected: 
(Power supply unless otherwise stated)
  • The door lock
  • Sensors used to set the position of the door mirror (2 per mirror)
  • Control panels.
  • Window lift mechanisms (front doors)
  • Door locks (front doors)
  • Door mirror motors (3 per mirror)
  • Door mirror heating
  • Lights in the door mirrors (optional equipment)
  • Control panels.
  • Turn signal lamps in the door mirrors.
Via LIN communication:  Via LIN communication: 
  • Left rear door module (LDM) (3/128)
  • Right rear door module (RDM) (3/129).
  • Left rear door module (LDM) (3/128)
  • Right rear door module (RDM) (3/129).
Via Controller Area Network (CAN) communication:  Via Controller Area Network (CAN) communication: 
  • Climate Control Module (CCM) (3/112)
  • Central electronic module (CEM) (4/56)
  • Driver door module (DDM) (3/126) (applies only to passenger door module (PDM))
  • Power seat module, left (PSL) (3/26)
  • Power seat module, right (PSR) (3/27)
  • Convertible Roof Module (CRM) (4/59)
  • Climate Control Module (CCM) (3/112)
  • Central electronic module (CEM) (4/56)
  • Passenger door module (PDM) (3/127) (applies only to driver door module (DDM))
  • Phone module (PHM) (16/60) (optional equipment).
  • Convertible Roof Module (CRM) (4/59)
Fig 1: Driver Door Module (DDM) And Passenger Door Module (PDM) System Overview
GLL150237Courtesy of VOLVO CARS CORPORATION
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

Rather have a pro handle this?

A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.

Comes to youSame-day available12-month warranty
Get a Free Quote

No obligation. See pricing before you book.