Checking The Power Supply

Check the power supply to the door control module:

• Measure the supply voltage between terminal #A18 (#18) and terminal #A8 (#9) on connector A for the door control module
• Measuring the battery voltage.

If the difference between the supply voltage for the door control module and the battery voltage is greater than 2.5 V, the fault is in the power cable or is due to contact resistance. Also check the fuse for the door control module. A half burned fuse can cause intermittent faults.

There may be an internal fault in the door control module if the difference is less than 2.5 V.

Remedy as necessary.

Other information: 

• see CONNECTING THE BREAKOUT BOX, DRIVER DOOR MODULE / PASSENGER DOOR MODULE (DDM/PDM) (2007) , and CONNECTING THE BREAKOUT BOX, DRIVER DOOR MODULE / PASSENGER DOOR MODULE (DDM/PDM) (2008-2011)
• see SIGNAL SPECIFICATION (2007-2011)
• see DRIVER DOOR MODULE (DDM)
• see PASSENGER DOOR MODULE (PDM)
• see CHECKING WIRING AND TERMINALS

Fig 1: Driver Door Module/Passenger Door Module (DDM/PDM)

Courtesy of VOLVO CARS OF NORTH AMERICA.

Refer to VERIFICATION MIXED