00538 ошибка ауди

00538 — Reference Voltage

00538 — Reference Voltage : Signal too large

00538 — Reference Voltage : Signal too small

Possible Causes

• Common Causes
  • Fuse(s) faulty
  • Wiring and/or Connector(s) from/to Control Module faulty
  • Control Module faulty
• Heating/Climate Control specific Causes
  • Fuse(s) faulty
  • Wiring and/or Connector(s) from/to Control Module for Heating/Climate Control (J255/J301) faulty
  • Flap Motor/Position Sensor faulty
  • Control Module for Heating/Climate Control (J255/J301) faulty

Possible Solutions

• Common Solutions
  • Check/Replace Fuse(s)
  • Check/Repair Wiring and/or Connector(s) from/to Control Module
  • Check/Replace Control Module
• Heating/Climate Control specific Solutions
  • Check/Replace Fuse(s)
  • Check/Repair Wiring and/or Connector(s) from/to Control Module for Heating/Climate Control (J255/J301)
  • Check/Replace Flap Motor/Position Sensor
    • Perform Output Test
  • Control Module for Heating/Climate Control (J255/J301)

Special Notes

• When found in Control Module for Heating/Climate Control (J255/J301):
  • Disconnect the electrical Connectors to the Position Sensors one after another, erase Fault Codes and check Fault Codes again. If the «Reference Voltage» Fault Code is no longer recognized (and the Fault Code for the reappears after reconnecting), the applicable Flap Motor/Position Sensor must be replaced.
    • When additional components such as G107 (sunlight sensor) are on the same 5V reference voltage supply make sure to unplug all sensors while troubleshooting using this method.

00538 — Reference Voltage : Faulty

Possible Causes

• Fuse(s) faulty
• Wiring and/or Connector(s) from/to Battery faulty
• Control Module faulty

Possible Solutions

• Check Fuse(s)
• Check Wiring and/or Connector(s) from/to Battery
• Check/Replace Control Module

Special Notes

• When found in Central Electronics Control Module (J519):
  • Specifically check the (Ground) Wiring from the Central Electronics Control Module (J519) to the Battery.
• When found in the Central Electronics / Body Control Module (BCM) in a (16/AJ) chassis Jetta check fuse SB19.

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