01800

01800 - Light Switch (E1)

01800 - Light Switch (E1): Implausible Signal

Possible Symptoms

• Parking Light Status Lamp (in Instrument Cluster) stuck ON
• Self Dimming Rear View Mirror not working

Possible Causes

• Light Switch (E1) faulty (or switched to an intermediate position)
• Wiring/Connectors from/to Light Switch (E1) faulty

Possible Solutions

• Check Light Switch (E1)
  • See Measuring Value Blocks (MVB)
• Check Wiring/Connectors from/to Light Switch (E1)

Special Notes

• When found in Audi A3/S3 (8P): Central Electronics, check Light Switch Status in Measuring Value Block (MVB) 017 and 018.
• When found in Audi A4/S4/RS4/Cabriolet (8E/8H): Central Electronics, check Light Switch Status in Measuring Value Block (MVB) 006.1.