Jetta GLX V6-2.8L (AFP) (2002)
-
Connect VAG1598/31 test box to Engine Control Module (ECM) wiring harness. Engine Control Module (ECM) is not connected by this action.
-
Connect multimeter to measure voltage between test box sockets -2- + -54-.
-
Switch ignition on.
-
Lift vehicle at left-front.
-
Rotate front wheel and observe voltage display.
Specified value: between 0 and at least 4 Volts, fluctuating.
NOTE: If necessary, hold the right-front wheel to prevent it from turning.
If the display does not fluctuate:
-
Check wiring to speedometer/speedometer sensor.
-
Check DTC memory.
-
Display readiness code.
If DTC memory has been erased or the Engine Control Module (ECM) was disconnected from permanent battery (B+) voltage, the readiness code
must be generated again.