Checking the relay for the receiver

NOTE: The first cars from model year 2003 have a relay in the circuit between the door switch and the VGLA control module. When the driver's door is open, the relay breaks the power supply to the receiver. This means that the remote control cannot affect the lock and alarm system. When the door is closed, the relay closes the supply circuit and the receiver is powered. The relay is in the bottom right position in the relay box in the passenger compartment. For cars produced later during 2003 and onwards, the relay has been replaced by a new function in the VGLA control module.

Check the relay connector. Check for contact resistance and oxidation.

Check the power supply cable between relay terminal #1 and the fuse. Check for an open-circuit.

The cable voltage should be battery voltage.

Check the cable between the relay terminal #2 and the driver's door switch. Check for an open-circuit. Check for a short-circuit to ground.

The relay uses this cable to ground the door switch.

HINT: When the door is open and the ignition is on, the relay must activate when the driver's door switch is pressed.

Check the cable between VGLA receiver terminal #5 and relay terminal #4. Check for an open-circuit.

Check the cable between relay terminal #3 and the fuse. Check for an open-circuit.

Try a new relay if no faults are found.

Other information:

See Checking wiring and terminals
For information about signals, see Signal specification, lock and alarm, (VGLA) .

Fig 1: 10-CD Changer Connector Terminals

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Ohmmeter

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 3: Identifying Relay

Courtesy of VOLVO CARS OF NORTH AMERICA.