TT Coupe L4-1.8L Turbo (ATC) (2001)
When indicated on display:
Read Measuring Value Block
Q
Input display group number XXX
-
Press buttons -0-, -5- and -0- to select "display group number 050" and press -Q- button to confirm input.
Indicated on display. (1 - 4 = display fields)
Read Measuring Value Block 50
->
1
2
3
4
-
Switch A/C system off.
-
Specified value in display field 4: Compr. OFF
-
Switch A/C system on using "Auto" button and adjust A/C system to maximum cooling or heating power. Compressor must run.
-
Specified value in display field 4: Compr. ON
-
Fully depress accelerator pedal abruptly and then release (brief acceleration).
-
Specified value in display field 4: Display switches for a few seconds from "Compr. ON" to "Corn Pr. OFF" (compressor switch - off for
vehicle acceleration)
If indications do not resemble description:
-
Connect VAG 1598/31 test box at wiring harness to ECM, do not connect ECM.
-
Check the following wire connection for open circuit and short circuit to Ground and B+:
Test box VAG 1598/31 socket
A/C control head -E87- terminal
41
-
-
Repair open circuit or short circuit if necessary.
-
If there are no malfunctions in the wiring, check function of A/C system.