Jetta L4-2.0L (AZG) (2004)
Test conditions
-
Workshop temperature: 20-30 °C (68-86 °F)
-
Engine at Workshop temperature.
Making connections
NOTE:
-
The following test procedure is only possible on vehicles where the - G65- square wave signal to the coolant fan control module -J2293- is also
transmitted to the Motronic Engine Control Module (ECM). Con firm -G65- circuit using wiring diagram.
-
On vehicles where -G65- is NOT connected to the ECM, connect green clip from VAG 1767 directly to -G65- pin 2 using appropriate VAG 1594
adapter cable -7-. Proceed directly to checking
-
Disconnect engine harness electrical connector from Engine Control Module (ECM) -3-.
-
Locate correct test box VAG 1 598A -4- and adapter according to pin assignments of ECM -3- and connect test box to engine wiring
connector/harness -2-.
-
Connect black clip from VAG 1767 to Ground (GND) -5-.
-
Determine applicable - G65- signal input pin assignment to ECM using wiring diagram. Example: T121/61
NOTE:
-
As -G65- function primarily controls coolant fan and A/C clutch operation, the engine wiring diagrams may indicate the - G65- signal connection
as being "Coolant fan control module connection".
-
ECM terminal number assignments correspond with those on test box VAG 1598A.
-
Connect green clip from VAG 1767 to the corresponding numbered position on test box VAG 1598A connected to -G65- pin -2- using
appropriate VAG 1594 adapter cable - 7-. Example: 61