Audi Workshop Service and Repair Manuals

• ‒ Read measured value block, Display Group 03, cold engine at idling speed .

• ‒ Observe display in display zone 3.

• Specification: The temperature reading should increase at a uniform rate.

If there is no realistic readout in display zone 3:

• ‒ Switch off ignition.
• ‒ → Pull off the connector on the sensor => Installation locations Overview, Page 24-4.
• ‒ Connect test box V.A.G 1598/22 to wiring harness for engine control unit
  => Page 24-6.

The following wiring connections should be checked for open circuits and/or short to positive or negative.

• ‒ Rectify any open/short circuit as necessary.

If no wiring fault is detected:

• ‒ Replace coolant temperature sender (G62).