To be able to turn on the independent heater, lock, unlock etc.... for Volvo P2 MY 1998 - 2004, you need to bridge the relay in the CEM which disconnects the OBD socket when the key is removed from the ignition.
To be able to turn on the independent heater, lock, unlock etc.... for Volvo P2 MY 1998 - 2004, you need to bridge the relay in the CEM which disconnects the OBD socket when the key is removed from the ignition.