Test-ID 09: Engine Coolant Temperature (ECT) Sensor -G62- (Vehicles with engine code AVH, AZG): Procedure

WARNING: This page does not describe the selected car, but rather 14 other vehicles, including the 2005 Volkswagen Jetta, 2004 Volkswagen Jetta, 2003 Volkswagen Jetta, 2003 Volkswagen Golf, and 2002 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.

Connect diagnostic tester, see CONNECT DIAGNOSTIC TESTER .
Perform a road test until a coolant temperature of 80 to 100 °C has been reached, see DIAGNOSTIC MODE 1: CHECK MEASURED VALUES ; PID 5, Coolant temperature.
Observe the safety precautions that apply to road tests. See SAFETY PRECAUTIONS .
Switch ignition off.
Start engine at a coolant temperature of 80 to 90 °C and let it run at idle.
Perform a road test anew.
The following operating conditions must be met during this road test:
Accelerate vehicle uniformly, not at Wide Open Throttle (WOT).
Drive for 10 minutes in the highest gear or in the highest driving mode on a level driving surface at a constant speed in the range of 65 to 80 km/h at an engine speed of 2000 to 2500 RPM.

Let engine run at idle.
Under address word 33, select "Diagnostic mode 6: Check test results of components that are not continuously monitored".
Select the "Test -ID 09: Engine Coolant Temperature (ECT) sensor".
Check specified values at idle.