Connect GDS to Data Link Connector(DLC).

Ignition "ON"

Monitor "Diagnostic Trouble Codes(DTC)" with GDS.

Is DTC status displayed as Present?

	▶ Go to "Monitor GDS Data" procedure.
	▶ Go to "Verification of Vehicle Repair" procedure.

Ignition Switch "OFF"

Connect Data Link Connector(DLC) to GDS.

Ignition Switch "ON" & Engine "Off"

Check "Current Data" with GDS.

Fig.1) Boost pressure and atmospheric pressure current data under engine idle condition.

※ Atmospheric pressure sensor outputs 1 atm. at sea level. Check for abnormal atmospheric pressure sensor signal value.

Is the parameter displayed 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.
	▶ Go to "Wiring Inspection" procedure.