Replacing The Gas Discharge Lamp Module (GDL)

If the gas discharge lamp module (GDL) (master) or any of the gas discharge lamp position sensors are replaced, the position sensors must be calibrated.

After replacement with a new gas discharge lamp module (GDL) (master), diagnostic trouble codes CEM-8A20 and CEM-8A21 are generated. These codes are deleted automatically after position sensor calibration.

Calibrate using VIDA (Volvo scan tool).

Calibration must always be performed with the vehicle unlocked and stationary on a level surface.