2011 Volvo XC90 Base, FWDFACTORY OEM SERVICE PROCEDURE

System Overview: Signals

The following table summarizes input signals to and output signals from the rear electronic module (REM). The signal types are divided into directly connected signals, serial communication and controller area network (CAN) communication. The illustration below displays the same information with the Volvo component designations.

Input signals Output signals
Directly connected:  Directly connected: 
  • Fuel level sensor (CNG) (7/156)
  • Fuel level sensor (LPG) (7/153)
  • Stop lamps from the central electronic module (CEM) (4/56)
  • Position sensor for headlamp range adjustment (Bi-Xenon) (7/120)
  • Tailgate lock unit (3/78)
  • Trailer module (TRM) (4/110) (optional extra).
  • Fuel level sensor (CNG) (7/156)
  • Rear demist, relay (9/2)
  • Cargo compartment lighting (10/127-128, 10/173) (S60/S80/XC90)
  • High level stop lamp (10/19)
  • Position sensor for headlamp range adjustment (Bi-Xenon) (7/120)
  • Inclination sensor module (ISM) (7/100) (XC90 structure week -201127)
  • Trailer module (TRM) (4/110) (optional extra).
Via serial communication:  Via serial communication: 
  • Inclination sensor module (ISM) (7/100) (extra equipment) (XC90 structure week -201127)
  • Inclination sensor module BBS-IS (16/35) (extra equipment) (XC90 structure week 201128-)
  • Siren BBS (16/35) (extra equipment) (XC90 structure week 201128-)
  • Parking assistance module (PAM) (4/86) (optional extra).
  • Inclination sensor module (ISM) (7/100) (extra equipment) (XC90 structure week -201127)
  • Inclination sensor module BBS-IS (16/35) (extra equipment) (XC90 structure week 201128-)
  • Siren BBS (16/35) (extra equipment) (XC90 structure week 201128-)
  • Parking assistance module (PAM) (4/86) (optional extra).
Via Controller Area Network (CAN) communication:  Via Controller Area Network (CAN) communication: 
  • Climate Control Module (CCM) (3/112)
  • Central electronic module (CEM) (4/56)
  • Engine control module (ECM) (4/46)
  • Supplemental Restraint System Module (SRS) (4/9)
  • Upper electronic module (UEM) (4/70)
  • Driver door module (DDM) (3/126).
  • Climate Control Module (CCM) (3/112)
  • Central electronic module (CEM) (4/56)
  • Driver information module (DIM) (5/1)
  • Infotainment control module (ICM) (16/94) (XC90)
  • Phone module (PHM) (16/60) (optional equipment)
  • Supplemental Restraint System Module (SRS) (4/9)
  • Transmission control module (TCM) (4/28).
Fig 1: Identifying Volvo Component Designations
GLL181404Courtesy of VOLVO CARS CORPORATION
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