Display group 019: Left heat regulating valve -N175- and right -N176-; pump for coolant recirculation -V50- and activation of windshield defroster

Fig 1: Channel Identification Chart - Display Group 019 (Model Year 2000 And Up Vehicles)

Courtesy of AUDI OF AMERICA, INC.

NOTE:

• If vehicle has no windshield defroster and no control module -J505- is installed, "0" or "00" is displayed.
• Control module for windshield defroster -J505- switches approx. battery voltage to outlet -E87- as long as voltage to -J505- is greater than 12.7 V and the control module is not too hot.
• Control head -E87- controls a transistor (if the windshield defroster is switched on) which halves the voltage to connector D terminal 11. Control module -J505- switches on the windshield defroster.
• If during heating the windshield voltage (board voltage -J505-) drops below 12.70V or if control module -J505- becomes too hot, a switch opens in -J505- and the voltage at the outlet to -E87- becomes less than 5V; simultaneously -J505- shuts off the windshield defroster.
• Function of windshield defroster. See WINDSHIELD DEFROSTER  .