A/C refrigerant system cooling performance, testing: Testing
- Switch ignition on.
- Open center instrument panel air outlets.
- Position thumb wheel for temperature-controlled center outlet to "warm".
- Set operating mode to "Auto" and "LO" temperature selection for driver and passenger sides on A/C control head - E87-.
- Start engine (compressor is operated).
- Run engine at 2000 RPM (start of time measurement).
- Measure temperature of air flowing out of the center instrument panel air outlets (driver and passenger sides).
Compare measurements with the diagram.
NOTE:
- If the specified values are not achieved. See DETERMINING MALFUNCTION IF TEST RESULTS DIFFER FROM SPECIFICATIONS .
- It is good practice to use two separate thermometers for this measurement.
- The temperature of the air in the mixing chambers of the air conditioner housing (downstream of heater core) can be measured with VAG 1551 during the A/C system cooling performance test (Read measuring value block, function 08. See READ MEASURING VALUE BLOCK (FUNCTION 08) , display group 014).