SHD Self Diagnosis

The SHD monitors its operation and stores fault codes if a defect is determined: The SHD monitors the following conditions:

• SHD Motor Relays:  The relays are checked for sticking contacts (plausibility) and non functional contacts.
• Hall Effect Position Sensors:  The SHD must detect a pulse frequency from the hall effect sensor(s) during operation.
• Sunroof Switch:  The SHD monitors the signal plausibility of the coded signaling from the sunroof switch.