Checking The Power Supply And Ground Terminal

Fig 1: Identifying Ignition OFF

Courtesy of VOLVO CARS CORPORATION

• Ignition off.

  Check the cable between central electronic module (CEM) terminal #E36 (#36) and siren control module (SCM) terminal #A3. Check for an open-circuit.

  Check the signal cable between central electronic module (CEM) terminals #G1 (#1) and siren control module (SCM) terminal #A2. Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage.

  Check the cable between siren control module (SCM) terminal #A1 and ground. Check for an open-circuit. Also check the ground terminal for oxidation.

  Remedy the cables as necessary.

  Other information 

  • see CONNECTING THE BREAKOUT BOX (2008-2012)
  • see SIGNAL DESCRIPTION CENTRAL ELECTRONIC MODULE (CEM)
  • see ANTI-THEFT PROTECTION SIREN (2007-2011) or ANTI-THEFT PROTECTION SIREN (2012)
  • see CHECKING WIRING AND TERMINALS

Was a fault detected? 

• YES 

  Refer to VERIFICATION 

• NO 

  Refer to REPLACING THE CONTROL MODULE