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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 (1.3L) >> 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. Remove fuel filler cap. Turn ignition on with engine off. Listen for operation of fuel pump at fuel filler pipe. Repeat ignition cycle as necessary. Fuel pump should operate for about 2 seconds. If fuel pump operates as specified, go to next step. If fuel pump does not operate, go to step  4.
  3. Remove fuel pump relay. Using a test light connected to battery positive, probe fuel pump relay control circuit at fuel pump relay connector. See appropriate wiring diagram in WIRING DIAGRAMS article. Crank engine. If test light illuminates, diagnose fuel system. See BASIC FUEL SYSTEM CHECKS . If test light does not illuminate, go to step  19.
  4. Turn ignition on with engine off. Remove fuel pump relay. Using a test light connected to ground, probe main relay circuit at fuel pump relay connector. See appropriate wiring diagram in WIRING DIAGRAMS article. If test light illuminates, go to next step. If test light does not illuminate, go to step  9.
  5. Turn ignition off. Connect a fused jumper wire between fuel pump power supply circuit and main relay circuit at fuel pump relay connector. See appropriate wiring diagram in WIRING DIAGRAMS article. Turn ignition on with engine off. Listen for operation of fuel pump. Repeat ignition cycle as necessary. If fuel pump operates, go to step  12. If fuel pump does not operate, go to next step.
  6. Leave jumper wire connected. Using a test light connected to ground, backprobe power supply circuit at fuel pump harness connector. See appropriate wiring diagram in WIRING DIAGRAMS article. If test light illuminates, go to next step. If test light does not illuminate, go to step  10.
  7. Turn ignition off. Remove jumper wire. Disconnect fuel pump harness connector. Using a test light connected to battery positive, probe ground circuit at fuel pump harness connector. See appropriate wiring diagram in WIRING DIAGRAMS article. If test light illuminates, go to next step. If test light does not illuminate, go to step  11.
  8. Remove fuel tank. Remove fuel sender assembly and inspect wire harness between fuel pump harness connector and fuel sender assembly. Repair as necessary. After repairs, go to step  20. If wire harness is okay, go to step  18.
  9. Check for an open or short in White/Blue wire between main relay and fuel pump relay. See appropriate wiring diagram in WIRING DIAGRAMS article. Repair as necessary. After repairs, go to step  20. If wire is okay, go to MAIN RELAY CIRCUIT .
  10. Repair open or short in Pink wire between fuel pump harness connector and fuel pump relay. See appropriate wiring diagram in WIRING DIAGRAMS article. After repairs, go to step  20.
  11. Repair poor connection or open in fuel pump ground circuit. See appropriate wiring diagram in WIRING DIAGRAMS article. After repairs, go to step  20.
  12. Turn ignition off. Remove jumper wire. Turn ignition on with engine off. Using a test light connected to ground, probe battery feed circuit at fuel pump relay connector. See appropriate wiring diagram in WIRING DIAGRAMS article. If test light illuminates, go to next step. If test light does not illuminate, go to step  15.
  13. Using a test light connected to battery positive, probe fuel pump relay control circuit at fuel pump relay connector. See appropriate wiring diagram in WIRING DIAGRAMS article. Crank engine. If test light illuminates, go to step  16. If test light does not illuminate, go to next step.
  14. Using a test light connected to battery positive, backprobe fuel pump relay control circuit at PCM harness connector. Crank engine. If test light illuminates, go to step  17. If test light does not illuminate, go to step  19.
  15. Repair open or short in IG-COIL fuse circuit between fuel pump relay and junction block. After repairs, go to step  20.
  16. Replace fuel pump relay. After repairs, go to step  20.
  17. Repair open in fuel pump relay control circuit between fuel pump relay and PCM. After repairs, go to step  20.
  18. Replace fuel pump. After repairs, go to step  20.
  19. Replace PCM. After repairs, go to next step.
  20. Operate vehicle under conditions in which problem originally occurred. If problem no longer exists, system is okay. If problem still exists, refer to DIAGNOSTIC AIDS .
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