2004 Volvo V70 Base, 2.4 61, StandardFACTORY OEM SERVICE PROCEDURE

System overview: Signals

The chart below summarizes the input signals to and output signals from the climate control module (CCM). The signal types are divided into directly connected signals, LIN and CAN communication. The illustration below displays the same information with the Volvo component designations.

Input signals Output signals
Directly connected:  Directly connected: 
  • Blower fan motor (6/28), diagnostic signal
  • Evaporator temperature sensor (7/41), control signal.
  • Blower fan motor (6/28), control signal.
Via LIN communication:  Via LIN communication: 
  • Damper motor module (DMM) for ECC (6/48, 6/95-96, 6/102-103)
  • Damper motor module (DMM) for MCC (6/48, 6/69, 6/95-96)
  • Air quality sensor (AQS) (7/159)
  • Seat heating module (SHM), passenger side (9/13)
  • Seat heating module (SHM), driver's side (9/12).
  • Damper motor module (DMM) for ECC (6/48, 6/95-96, 6/102-103)
  • Damper motor module (DMM) for MCC (6/48, 6/69, 6/95-96)
  • Air quality sensor (AQS) (7/159)
  • Seat heating module (SHM), passenger side (9/13)
  • Seat heating module (SHM), driver's side (9/12).
Via Controller Area Network (CAN) communication:  Via Controller Area Network (CAN) communication: 
  • Central electronic module (CEM) (4/56)
  • Engine control module (ECM) (4/46)
  • Rear electronic module (REM) (4/58)
  • Brake control module (BCM) (4/16)
  • Driver door module (DDM) (3/126)
  • Passenger door module (PDM) (3/127)
  • Upper electronic module (UEM) (4/70)
  • Steering wheel module (SWM) (3/254).
  • Central electronic module (CEM) (4/56)
  • Driver door module (DDM) (3/126)
  • Passenger door module (PDM) (3/127)
  • Brake control module (BCM) (4/16)
  • Rear electronic module (REM) (4/58)
  • Engine control module (ECM) (4/46).
Fig 1: Identifying Climate Control Communication Chart
GLL146624Courtesy of VOLVO CARS OF NORTH AMERICA.
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.