Ignition switch "OFF"

Connect VMI to GDS and set up the Oscilloscope.(2 Channel):

Channel A (+) : Pin No. 4 (ACV Feedback Signal) terminal (ACV Harness Connector)

Channel A (-) : Ground

Connect GDS to Data Link Connector (DLC).

Ignition switch "ON" & Engine "ON"

Inspection condition : From engine idle to ignition switch "OFF"

Fig.1) Section A : ACV position sensor signal voltage when engine idle. Voltage is maintained at approx. 4V

Section B : ACV position sensor signal voltage when ignition switch is turned off. ECM operates throttle flap for 3 times. Voltage is at between approx. 4V and 0.54V

Section C : ACV position sensor signal voltage when ECM cuts the supply power after ignition switch is turned off. Voltage is 0V when ECM cuts the sensor supply power

Is the measured value within specification?

	▶ Fault is intermittent caused by poor contact in the sensor’s and/or ECM’s connector or was repaired and ECM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "Verification of vehicle Repair" procedure.
	▶ Carefully re-do this troubleshooting guide steps. ▶ If no problems were found with the circuits or connectors, replace the ACV and go to "Verification of Vehicle Repair" procedure.

Ignition switch "OFF"

Connect GDS to Data Link Connector (DLC).

Ignition switch "ON" & Engine "OFF"

Perform "Essential Work After Component Replacement" in "Vehicle S/W Management" with GDS.

Select "Throttle Valve"

Fig.1) Vehicle S/W Management list of U2 engine

Fig.2) "Essential Work After Component Replacement"

Fig.3) Throttle vale Change

Fig.4) Complete