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HOMESERVICE MANUALSVOLVO2009XC70 BASEREPAIR AND DIAGNOSISENGINE PERFORMANCEENGINE CONTROL SYSTEMSELECTRICAL MODULES AND COMPONENTS - DESIGN AND FUNCTION - 1 OF 5CLIMATE CONTROL MODULE (CCM) (2008-2012)SYSTEM OVERVIEWSIGNALS

2009 Volvo XC70 Base

System Overview: Signals

2009 Volvo XC70 BaseSECTION Signals

The table 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:
Passenger compartment temperature sensor (7/10) (does not apply to S60 and V60) Evaporator temperature sensor (7/41). Humidity sensor (AQS) (7/159), option (only ECC) Blower fan (6/28)	Blower fan (6/28)
Via LIN communication:	Via LIN communication:
Seat heating module (SHM) (9/12-15) Humidity sensor (7/90), option (only ECC) Damper motor module (DMM) (6/48, 6/95-96, 6/102-103) (ECC) Damper motor module (DMM) (6/48, 6/95, 6/103) (ETC) Switch, rear seat heaters (3/65) (option) Interior rear-view mirror control module (IEC) (8/48)	Seat heating module (SHM) (9/12-15) Humidity sensor (7/90), option (only ECC) Damper motor module (DMM) (6/48, 6/95-96, 6/102-103) (ECC) Damper motor module (DMM) (6/48, 6/95, 6/103) (ETC) Switch, rear seat heaters (3/65) (option) Interior rear-view mirror control module (IEC) (8/48)
Via Controller Area Network (CAN) communication:	Via Controller Area Network (CAN) communication:
Central electronic module (CEM) (4/56) Infotainment control module (ICM) (3/281) Engine control module (ECM) (4/46) Brake control module (BCM) (4/16) Steering wheel module (SWM) (3/130) Driver door module (DDM) (3/126) Passenger door module (PDM) (3/127) Rain sensor module (RSM) (7/149) via central electronic module (CEM) (4/56)	Central electronic module (CEM) (4/56) Infotainment control module (ICM) (3/281) Engine control module (ECM) (4/46) Brake control module (BCM) (4/16) Steering wheel module (SWM) (3/130) Driver door module (DDM) (3/126) Passenger door module (PDM) (3/127) Rain sensor module (RSM) (7/149) via central electronic module (CEM) (4/56)

Fig 1: Identifying Input Signals And Output Signals From Climate Control Module (CCM)

Courtesy of VOLVO CARS CORPORATION

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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.