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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1850 (Engine Controls And Fuel - 2.4L (Lat) - Troubleshooting & Diagnosis) >> Engine Cranks but Does Not Run >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
  1. Crank the engine for up to 30 seconds.
  2. Observe the Engine DTC information with a scan tool.
    • If any of the following DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle to diagnose those DTCs P0201-P0206, P0335, P0336, P0351-P0353, P0601, P0602, P0603, P0604, P0606, P0607, P060E, P062F, P0685, P0689, P0690, P1516, P1682, P2610.
  3. Observe the engine speed parameter while cranking the engine.
  4. Install a spark tester.
  5. Crank the engine for 15 seconds. Spark should be observed from the Spark Tester.
  6. With the ignition ON and the engine OFF, test the fuses that are supplied by the powertrain relay for voltage. The test lamp should illuminate at each fuse test point.
    • Emission Fuse
    • Ignition 1 Fuse
    7. IMPORTANT: Additional DTCs may set when using the fuel pump output control.
  7. Command the fuel pump ON and OFF. Fuel pump should energize when commanded ON and De-energize when commanded OFF
  8. Turn OFF the ignition.
  9. Install the J 34730-1A  . Turn ON the ignition and command the fuel pump ON while observing the J 34730-1A  . The fuel pressure should be between 345-414 kPa (50-60 psi).
  10. Inspect for the following conditions:
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