Checking Component And Wiring

The diagnostic trouble code indicates that communication between central electronic module and Siren control module (SCM) (optional equipment) or Remote Receiver Module (RRX) is not working. This may be due to a fault in the signal cable between the control modules or a defective communication device in one or all of the control modules.

Check the signal cable between the central electronic module (CEM) and the Siren control module (SCM). Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage.

Take readings between:

• Central electronic module (CEM) terminal #G1 (#1) and siren (SCM) terminal #2.

Check the cable between the central electronic module (CEM) and the Remote Receiver Module (RRX). Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage.

Remedy as necessary.

Other information 

• see CONNECTING THE BREAKOUT BOX (2004, 2005, 2006, 2007)
• see SIGNAL DESCRIPTION CENTRAL ELECTRONIC MODULE (CEM) (2004, 2005, 2006, 2007)
• see LOCATION OF COMPONENTS (2004, 2005, 2006, 2007)
• see CONTROL MODULE RELAY BOX PASSENGER COMPARTMENT
• see CHECKING WIRING AND TERMINALS

Fig 1: Identifying 3-Bit Connector

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying 10-Bit Connector

Courtesy of VOLVO CARS OF NORTH AMERICA.

Was a fault detected? 

• YES 

  Refer to VERIFICATION 

• NO 

  Refer to CHECKING COMMUNICATION