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Read Measuring Value Block

WARNING: This page is about a different car, the 2001 Audi S4, 2001 Audi A4, 2000 Audi S4, and 2000 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: There are 10 measuring value blocks, each containing 4 measured values. When performing READ MEASURING VALUE BLOCK, function 08, control of A/C system is possible (compressor operates, air distribution control is possible, etc.). Readouts in display groups 02 through 05 show actual measured values (servo motor potentiometer resistances) learned during last basic setting. Position of air/temperature distribution flaps can be altered by manual control of control panel and corresponding flap positions can be determined by watching display values change. Measured values in display must correspond to specified values.
  1. Check Diagnostic Trouble Code (DTC) memory. See RETRIEVING & CLEARING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTICS. Repair A/C system malfunctions (if any). After checking DTC memory, keep engine operating and turn A/C system to AUTO mode. Operate fan at high speed for about one minute.
  2. Ensure scan tool is in A/C HEATING ELECTRONICS function. With RAPID DATA TRANSFER displayed on scan tool, press "0" and "8" buttons to select READ MEASURING VALUE BLOCK function. Press "Q" button to confirm input.
  3. With ENTER DISPLAY GROUP NUMBER displayed on scan tool, enter desired display group number. See DISPLAY GROUP NUMBER IDENTIFICATION  table. Press "Q" button to confirm input.
  4. With READ MEASURING VALUE BLOCK X displayed on scan tool, check component function, measured value, or operating conditions using display field reference. See DISPLAY GROUP NUMBER IDENTIFICATION  table. To select a different display group number, press "C" button. Press right arrow button to end procedure.
DISPLAY GROUP NUMBER IDENTIFICATION

Display Group No. Display Field Application
01 1 A/C Compressor Switch-Off Conditions
2 Voltage For A/C Clutch
3 A/C-Heater Control Panel Voltage
4 Ignition Off Standing Time In Minutes
02 1-4 Temperature Regulator Flap Motor
03 1-4 Central Flap Motor
04 1-4 Footwell/Defroster Flap Motor
05 1-4 Airflow Flap Motor
06 1 Calculated Ambient Temperature For Outside Air Temperature Display
2 Fresh Air Intake Duct Temperature Sensor
3 Outside Air Temperature Sensor
4 Not Assigned
07 1 Center Outlet Temperature Sensor
2 Floor Outlet Temperature Sensor
3 (1) Instrument Panel Interior Temperature Sensor
4 Coolant Temperature
08 1 Fresh Air Blower Specified Voltage
2 Fresh Air Blower Actual Voltage
3 Instrument Panel Dimmer Switch Voltage
4 (2) Voltage For A/C Control Panel
09 1 Engine Speed
2 Vehicle Speed
3 (2) Voltage For A/C Control Panel
4 Auxiliary Heater
10 1 Coolant Temperature Signal
2 A/C Compressor Intervention
3 A/C Pressure Switch
4 (2) Rear Window Heating
11 (3) 1-4 Last 4 Compressor Cut-Off Conditions That Were Effective For More Than 20 Seconds
12 (3) 1 Idle RPM Increase
2 Activation Of Cooling Fan Low Speed
3 Coding Key
4 Not Assigned
(1) Instrument panel interior temperature sensor is installed in A/C-heater control panel and cannot be checked or replaced individually. If a malfunction is detected, A/C-heater control panel must be replaced.
(2) For A/C-heater control panel with one display.
(3) Display group is only used on A/C-heater control panels with a part number 8D0 820 043 after index "M" with one display.
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