Checking locking relay circuit

Remove the locking relay (2/111).

Check the cable between terminal #4 the cable connector and terminal #3 on the relay base for an open-circuit according to Open-circuit, permanent faults .

If a fault is detected, check in particular the 2 intermediate connectors in the cable harness for contact resistance and oxidation according to Contact resistance and oxidation .

Remedy as necessary.

If no fault is detected, measure the resistance between terminal #4 in the relay base and ground.

The ohmmeter should read 0 ohm.

If the resistance is incorrect, replace the rear electronic module.

Other information 

• To access and replace the rear electronic module, see Relay/fuse box cargo compartment/Rear electronic module (REM), replacing .

Fig 1: Identifying Connector Terminals

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Ohmmeter

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 3: Identifying Relays

Courtesy of VOLVO CARS OF NORTH AMERICA.

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  OKAY:  Troubleshooting has been completed.