2011 Volvo C70FACTORY OEM SERVICE PROCEDURE

System Overview: Signals

The table below summarizes the input signals to and output signals from the keyless vehicle module (KVM). The signal types are divided into directly connected signals, serial communication and controller area network (CAN) communication. The illustration below (see Fig 1) displays the same information with the Volvo component designations.

Input signals Output signals
Directly connected:  Directly connected: 
  • Lock button on the handles on the side doors (3/273-276) for locking.
  • Unlocking switch in the external door handles (3/273-276), indicates that the door handle has been pulled out.
  • Unlocking contact breaker for the luggage compartment (10/3), indicates that the unlocking button is pressed in.
  • Quick lock switch in each side door (3/76-77, 3/100, 3/110), motor activation permitted.
  • Key-in switch (3/1), indicates that the starter button is pressed in.
  • Central electronic module (CEM) (4/56), signal indicating that the brake pedal is pressed
  • Clutch switch (MAN) (3/271), indicates that the clutch pedal is pressed.
  • Internal antennas (16/134-135), for communication with a key in the passenger compartment.
  • Antenna in the luggage compartment (16/133), for communication with keys
  • External antennas in door handle front (C30/C70) (3/273-274), for communication with key.
  • External antennas in door handle rear (S40/V50) (3/275-276), for communication with key.
  • External rear antenna (16/132), for communication with keys.
  • Lock unit with quick lock motor, front left (3/100), for opening the door.
  • Lock unit with quick lock motor, front right (3/110), for opening the door.
Via serial communication (ISO):  Via serial communication (ISO): 
  • Remote keyless entry (TRX) receiver (4/119), for receiving data from keys.
  • Remote keyless entry (TRX) receiver (4/119), control command.
  • Remote keyless entry (TRX) receiver (4/119), message to a passive key.
Via Controller Area Network (CAN) communication:  Via Controller Area Network (CAN) communication: 
  • Central electronic module (CEM) (4/56)
  • Infotainment control module (ICM) (16/1) when changing customer parameters.
  • Convertible Roof Module (CRM) (4/59) (C70)
  • Central electronic module (CEM) (4/56)
  • Driver information module (DIM) (5/1)
  • Infotainment control module (ICM) (16/1) when changing customer parameters.
Fig 1: Identifying KVM & Components
GLL162132Courtesy of VOLVO CARS CORPORATION
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