Checking Fuel Pump Operation Using Scan Tool (Turbo)

Connect scan tool to data link connector No. 3. See Figure. Turn ignition on. DO NOT start engine.
Turn scan tool on. Select ACTIVE TEST MODE on scan tool. Using scan tool manufacturer's instructions, activate fuel pump. Listen for operating sound at fuel pump and feel for fuel pressure in fuel inlet at fuel filter. Turn ignition off. Remove scan tool. If fuel pump operates, check fuel pressure. See FUEL PRESSURE (FUEL SYSTEM) .
If fuel pump does not operate, EFI main relay or EFI No. 2 relay may be defective. For explanation of EFI main relay or EFI No. 2 relay operation, see FUEL PUMP CONTROL CIRCUIT under FUEL SYSTEM. For testing of EFI main relay and EFI No. 2 relay, see SYSTEM/COMPONENT TESTS article.
If EFI main relay and EFI No. 2 relay are okay, check for defective fuses or wiring circuit. See appropriate wiring diagram in WIRING DIAGRAMS article. If fuses and wiring are okay, check for defective fuel pump. See CHECKING FUEL PUMP OPERATION BY APPLYING BATTERY VOLTAGE TO FUEL PUMP under FUEL SYSTEM.

NOTE: If problem exists in the fuel pump Electronic Control Unit (ECU) or control circuit, a Diagnostic Trouble Code (DTC) P1200 may be stored in the Engine Control Module (ECM). See TESTS W/CODES article for retrieving and servicing of any DTCs.