Checking the VGLA receiver
Check the VGLA receiver connector. Check for contact resistance and oxidation.
Check the wiring between VGLA control module terminals #A8 (A8), #A9 (A9), #B16 (A42) and VGLA receiver terminals #1, #2 and #3. Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage.
Check power supply cable between VGLA receiver terminal #5 and the fuse. Check for an open-circuit.
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 For cars produced later during 2003 and onwards, the relay has been replaced by a new function in the VGLA control module.
Model year 2003-
Check the cable between VGLA receiver terminal #5 and remote control relay terminal #4. Check for an open-circuit.
Check the cable between the relay for the receiver terminal #3 and the fuse. Check for an open-circuit.
Check the ground lead between VGLA receiver terminal #4 and the ground terminal. Check for an open-circuit.
Try a new receiver if no fault is found.
Other information:
- See Checking wiring and terminals
- For information about signals see Signal specification, lock and alarm, (VGLA) .