Test NS-3A - Checking Fuel System

NOTE: Perform TEST NS-SEL - NO START TEST SELECTION MENU before proceeding. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article.

WARNING: Fuel system is under high pressure. Release fuel pressure before opening fuel system. See FUEL PRESSURE RELEASE .

Ensure throttle cables at throttle body are not holding the throttle open. If throttle cables are not holding throttle open, go to next step. If throttle cables are holding throttle open, repair components as necessary. Perform TEST VER-1A - NO START VERIFICATION .
Using scan tool, read throttle position sensor voltage. If throttle position sensor voltage is 1.5 volts or less, go to next step. If throttle position sensor voltage is more than 1.5 volts, replace throttle position sensor. Perform TEST VER-1A - NO START VERIFICATION .
If vehicle is equipped with factory vehicle theft security system, go to next step. If vehicle is not equipped with factory vehicle theft security system, go to step 5.
Using scan tool, read vehicle theft security system status. If scan tool indicates FUEL IS ON, go to next step. If scan tool does not indicate FUEL IS ON, perform Vehicle Theft Security System (VTSS) TEST 1A. See appropriate BODY CONTROL COMPUTER TESTS article in ACCESSORIES & EQUIPMENT section. If no problem exists with the vehicle theft system, replace PCM. Perform TEST VER-1A - NO START VERIFICATION . The PCM is located between driver's side front fender and power distribution center, near battery.
Using scan tool, actuate ASD fuel system test. Check for fuel pump operating sound at fuel pump. Fuel pump is located in the fuel tank. If fuel pump operates, go to next step. If fuel pump does not operate, perform TEST NS-3D - CHECKING FUEL PUMP .
Turn ignition off. Release fuel pressure. Connect fuel pressure gauge to fuel pressure test port on fuel rail. Fuel pressure test port is located near front (timing belt end) of fuel rail.

Ensure fuel tank is at least 1/4 full. Turn ignition on. Using scan tool, actuate ASD fuel system test and note fuel pressure. Fuel pressure should be within specification. See FUEL PRESSURE SPECIFICATIONS table.

FUEL PRESSURE SPECIFICATIONS

Application	psi (kg/cm² )
2.4L	43-53 (3.0-3.7)

If fuel pressure exceeds specification, perform TEST NS-3C - REPAIRING HIGH FUEL PRESSURE . If fuel pressure does not exceed specification, go to next step. If fuel pressure is less than specified, perform TEST NS-3B - REPAIRING LOW FUEL PRESSURE . If fuel pressure is within specification, test is complete. Refer to TEST NS-SEL - NO START TEST SELECTION MENU for additional symptom diagnostic information.