Jetta V6-2.8L (AFP) (1999)
-
Disconnect 5-pin harness connector from Mass Air Flow (MAF) sensor -G70- with Intake Air Temperature (IAT) sensor -G42- (arrow).
-
Connect multimeter to measure voltage on harness connector terminal -2- and engine Ground (GND).
-
Start engine and run at idle.
Specified value: 11.0-15.0 V
If no voltage is present:
-
Switch ignition off.
-
Check wire between 5-pin harness connector terminal -2- and Fuel Pump (FP) relay -J17- for open circuit according to wiring diagram.
Wire resistance: max. 1.5 ohms
If the voltage supply and wiring is OK:
-
Connect multimeter to measure voltage on harness connector terminal -4- and engine Ground (GND).
-
Switch ignition on.
Specified value: min. 4.5 V
If no voltage is present:
-
Switch ignition off.