Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Chevrolet >> 1999 >> Metro Base, 2D Hatchback >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Testing >> No Start Diagnosis >> No Start-Engine Cranks Okay (1.8L) >> Fuel System Electrical Circuit

Fuel System Electrical Circuit

  1. Perform On-Board Diagnostic (OBD) system check. See ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK in appropriate SELF-DIAGNOSTICS article. After performing OBD system check, go to next step.
  2. Turn ignition on with engine off. Using scan tool, command circuit opening relay on and off while listening for relay operation behind driver's side kick panel. If relay operation is heard, go to step 10)  . If relay operation is not heard, go to next step.
  3. Remove circuit opening relay. Ensure ignition is on. Using a test light connected to ground, probe cavities No. 2 and 3 (Black wires) at circuit opening relay connector. See appropriate wiring diagram in WIRING DIAGRAMS article. If test light illuminates at both cavities, go to next step. If test light does not illuminate at both cavities, go to step 6)  .
  4. Using a test light connected to battery positive, probe circuit opening relay control circuit at circuit opening relay connector. See appropriate wiring diagram in WIRING DIAGRAMS article. Using scan tool, command fuel pump on. If test light illuminates, go to step 8)  . If test light does not illuminate, go to next step.
  5. Check for an open in circuit opening relay control circuit. Repair as necessary. After repairs, go to step 9)  . If circuit is okay, go to step 7)  .
  6. Check for cause of no ignition positive voltage to circuit opening relay. See appropriate wiring diagram in WIRING DIAGRAMS article. Repair as necessary. After repairs, go to step 9)  .
  7. Replace PCM. After repairs, go to step 9)  .
  8. Replace circuit opening relay. After repairs, go to next step.
  9. Attempt to start engine. If engine starts and continues to run, go to step 17)  . If engine does not start, or starts and stalls, go to next step.
  10. Remove rear seat cushion. Turn ignition on with engine off. Place a listening device against fuel sender assembly access panel. Using scan tool, command fuel pump on. Listen for fuel pump operation. If fuel pump operation is heard, diagnose fuel system. See BASIC FUEL SYSTEM CHECKS . If fuel pump operation is not heard, go to next step.
  11. Remove fuel sender assembly access panel. Disconnect fuel sender assembly harness connector. Using a test light connected to ground, probe fuel pump power feed circuit at fuel sender assembly harness connector. See appropriate wiring diagram in WIRING DIAGRAMS article. Using scan tool, command fuel pump on. If test light illuminates, go to next step. If test light does not illuminate, go to step 14)  .
  12. Using a test light connected to battery positive, probe fuel pump ground circuit at fuel sender assembly harness connector. See appropriate wiring diagram in WIRING DIAGRAMS article. If test light illuminates, go to step 15)  . If test light does not illuminate, go to next step.
  13. Repair open in fuel pump ground circuit. After repairs, go to step 17)  .
  14. Repair open in fuel pump power feed circuit between circuit opening relay and fuel sender assembly. After repairs, go to step 17)  .
  15. Check for an open in fuel pump power or fuel pump ground circuit (located inside fuel tank) between fuel pump and fuel sender assembly. See appropriate wiring diagram in WIRING DIAGRAMS article. Repair as necessary. After repairs, go to step 17)  . If circuits are okay, go to next step.
  16. Replace fuel pump. After repairs, go to next step.
  17. Start engine and allow it to reach normal operating temperature. Using scan tool, check for DTCs. If any DTCs are present, diagnose DTCs. See appropriate SELF-DIAGNOSTICS article. If no DTCs are present, system is okay.
scientia non olet · About Mike's Workshop Manuals