TT Quattro Roadster L4-1.8L Turbo (AMU) (2002)
Read measuring value block
Enter display group number XXX
-
Press buttons -0-, -0- and -4- to select "display group number 004" and press -Q- button to confirm input.
Indicated on display
Read measuring value block 4
->
1
2
3
4
-
Check specified value for Intake Air Temperature (IAT) sensor in display field 4:
NOTE: With cold engine, Intake Air Temperature (in display field 4) must approximately match the coolant temperature (in display field 3).
Display Group 004
Checking wire connections
-
Connect VAG1598/31 test box at wiring harness to ECM, do not connect ECM. See: Testing and Inspection/Scan Tool Testing and
Procedures/Scan Tool Testing/Scan Tool Connecting and Initial Checks/Wiring and Component Testing Using VAG1598/31 Test Box
-
Check the following wire connections for open circuit and short circuit to Ground (GND) and B+:
Harness connector
VAG1598/31 test box
Terminal
Socket
1
85
2
108
-
Check both wires to each other for short circuit.
-
Repair open circuit or short circuit if necessary.
If no malfunctions are found in wires: