2004 Volvo V70 T-5, StandardFACTORY OEM SERVICE PROCEDURE

System overview: Signals

The following chart 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)
  • High level stop lamp (10/19)
  • Position sensor for headlamp range adjustment (Bi-Xenon) (7/120)
  • Fuel filter temperature switch (Diesel) (8/85)
  • Inclination sensor module (7/100)
  • Trailer module (TRM) (4/110) (optional extra).
Via serial communication:  Via serial communication: 
  • Inclination sensor module (7/100) (optional extra)
  • Parking assistance module (PAM) (4/86) (optional extra).
  • Inclination sensor module (7/100) (optional extra)
  • 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)
  • Phone module (PHM) (16/60) (optional equipment)
  • Supplemental Restraint System Module (SRS) (4/9)
  • Transmission control module (TCM) (4/28).
Fig 1: Identifying Rear Electronic Module (REM) Communication Links & Components
GLL146429Courtesy of VOLVO CARS OF NORTH AMERICA.
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