Checking the function of the rear electronic module (REM)

Fig 1: Identifying Ignition ON

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Ignition on.

  Check the power supply and the ground for the rear electronic module (REM) by switching on the rear fog lamp using the button on the dashboard.

  Check that the central electronic module (CEM) is powered by activating the hazard warning signal flasher switch. If this is the case, the power supply for the rear electronic module (REM) can also be checked by pressing the brake pedal. The stop lamp must then light.

  Fig 2: Identifying Central Electronic Module

  Courtesy of VOLVO CARS OF NORTH AMERICA.

Is there power and ground for the rear electronic module (REM)? 

• YES 

  Refer to Checking communication with the rear electronic module (REM) 

• NO 

  Refer to Checking the power supply and ground for the rear electronic module (REM) 

HINT: After carrying out the repair, check that the fault has been remedied. 

Fig 1: Identifying Ignition ON

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Connector(s) Reinstallation

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Ignition off
• Reconnect the connectors. Reinstall the components
• Ignition on.

  Check the power supply and the ground for the rear electronic module (REM) by switching on the rear fog lamp using the button on the dashboard.

  If the central electronic module (CEM) is definitely powered, the power supply for the rear electronic module (REM) can also be checked by pressing the brake pedal. The stop lamp must then light.

Is there power and ground for the rear electronic module (REM)? 

• YES 

  OKAY:  Troubleshooting has been completed.

• NO 

  Refer to Information