2011 Volvo C70FACTORY OEM SERVICE PROCEDURE

System Overview: Signals

The table below summarizes the input signals to and output signals from the supplemental restraint system module (SRS). The signal types are divided into directly connected signals and CAN communication. The illustration below (Fig 1) displays the same information with the Volvo component designations.

Input signals Output signals
Directly connected:  Directly connected: 
  • Side impact sensor left B-post (7/115)
  • Side impact sensor right B-post (7/116)
  • Side impact sensor left-hand door (7/208)
  • Side impact sensor right-hand door (7/209)
  • Frontal collision sensor left front (7/179)
  • Frontal collision sensor right front (7/178)
  • Seat belt buckle passenger (3/94)
  • Seat belt buckle driver (3/93)
  • Switch on/off, front passenger airbag (3/157) (not USA/CDN)
  • Seat position sensor passenger (3/256) (USA/CDN only)
  • Seat position sensor driver (3/255) (USA/CDN only).
  • Central electronic module (CEM) (4/56), collision output signal
  • Phone Module (PHM) (16/60), collision output signal
  • Belt tensioner passenger front (8/34)
  • Seat belt tensioner driver (8/33)
  • Seat belt tensioner left rear (8/55)
  • Seat belt tensioner right rear (8/56)
  • Adaptive steering column (8/99) (USA/CDN only)
  • Airbag passenger front stage 1 (8/31)
  • Airbag passenger front stage 2 (8/32)
  • Airbag driver front stage 1 (8/30)
  • Airbag driver front stage 2 (8/61)
  • Side impact protection (SIPS) bag left front (8/51)
  • Side impact protection (SIPS) bag right front (8/52)
  • Door installed inflatable curtain left (8/66)
  • Door installed inflatable curtain right (8/67)
  • Adaptive seatbelt force limiter driver (8/128) (USA/CDN only)
  • Adaptive seatbelt force limiter passenger front (8/129) (USA/CDN only).
  • Rollover bar cassette left (8/57)
  • Rollover bar cassette right (8/58)
Via local CAN communication (USA/CDN only):  Via local CAN communication (USA/CDN only): 
  • Occupant weight sensor (OWS) (7/93).
  • Occupant weight sensor (OWS) (7/93).
Via Controller Area Network (CAN) communication:  Via Controller Area Network (CAN) communication: 
  • Central electronic module (CEM) (4/56)
  • Driver information module (DIM) (5/1).
  • Central electronic module (CEM) (4/56)
  • Driver information module (DIM) (5/1).
  • Phone module (PHM) (16/60).
Fig 1: SRS System Communication
GLL150810Courtesy of VOLVO CARS CORPORATION
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.