Checking the signal from the switches in the rear doors

• Ignition on
• Read off the status from the control switch in both rear doors (indicates whether the doors are locked or not).

  Lock and unlock the left and right-hand rear doors. The status of each door should change when the door is locked or unlocked.

  HINT: The doors can also be locked/unlocked using the remote control. 

  The fault is permanent if the status does not change.

  If the status changes, this indicates an intermittent fault, i. e. the fault was present previously but is not active at the moment.

  Fig 2: Identifying VCT2000 Diagnostic Tool Symbol In VIDA

  Courtesy of VOLVO CARS OF NORTH AMERICA.
  Fig 3: Identifying Central Locking Motor

  Courtesy of VOLVO CARS OF NORTH AMERICA.

• Continue 

  Refer to Checking the function of the lock mechanism 

Check the connectors for the lock mechanism and the rear electronic module (REM). Check for contact resistance and oxidation.

Check the switch in the lock mechanism. Check for a short-circuit. Check for an open-circuit. Check by measuring the resistance between terminals #1 and #5 on the connector for the lock mechanism and ground.

Check the resistance between terminals #1 and #5 on the lock mechanism side. The resistance must be infinite or near 0 ohm depending on the position of the switch.

Left rear door 

Check the signal cable between rear electronic module (REM) connector terminal #45 (#C5) and terminal #5 on the lock mechanism connector. Check for a short-circuit to supply voltage. Check for an open-circuit. The lock mechanism is jammed if no fault is found in the cable or the switch.

Right rear door 

Check the signal cable between rear electronic module (REM) connector terminal #28 (#D28) and terminal #5 on the lock mechanism connector. Check for a short-circuit to supply voltage. Check for an open-circuit. The lock mechanism is jammed if no fault is found in the cable or the switch.

Remedy as necessary.

Other information 

• See Connecting the breakout box
• See Signal specification
• See Lock mechanism front side door, replacing
• Disconnecting the rear electronic module (REM):
  • For -2004, see: Integrated relay/fusebox cargo compartment/Rear electronic module (REM), replacing
  • For 2005-, see: Rear electronic module (REM), replacing .
• See Checking wiring and terminals

• Continue 

  Refer to Verification