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No Start Test No 10 - Fuel Injector System (Code 26)

  1. With tester connected to diagnostic connector, remove air intake plenum. Disconnect all injectors. Enter ATM Test "02". Refer to ENTERING ON-BOARD DIAGNOSTICS  in this article. Connect voltmeter negative lead to ground. Touch positive lead of voltmeter to Dk. Green/Black wire of each injector. If voltmeter reads battery voltage at each injector, go to next step. If voltmeter reads zero volts at one or more of the connectors, repair Dk. Green/Black wire of injector harness for an open circuit to injector connector.
    Fig 1: Fuel Injector System
    G72098
  2. With system in ATM Test "02", connect injector connector No. 1 to injector No. 1. Leave connected for 10 seconds and listen for clicking noise. If injector No. 1 clicks, go to step 8). If injector No. 1 does not click, go to next step. Ensure ATM Test "02" has not timed out before going to next step.
  3. Disconnect connector from injector No. 1. Connect injector connector No. 6 to injector No. 6. Leave connected for 10 seconds and listen for clicking noise. If injector No. 6 clicks, go to step 7). If injector No. 6 does not click, go to next step.
  4. Disconnect injector No. 6. Connect injector connector No. 2 to injector No. 1. With system in ATM Test "02", leave connected for 10 seconds and listen for clicking noise. Disconnect injector connector No. 2 from injector No. 1. Connect injector connector No. 4 to injector No. 6. Leave connected for 10 seconds and listen for clicking noise. If injectors No. 1 and 6 do not click, replace injectors No. 1 and 6. If only one injector failed to click, replace injector that did not click. If both injectors No. 1 and 6 clicked, go to next step.
    Fig 2: Ohmmeter Between Injector and 14-Pin Connector
    G12128
  5. Turn ignition off. Disconnect 14-pin connector from SMEC. Connect an ohmmeter between Yellow/White wire in cavity No. 5 and ground. If ohmmeter is reading continuity, repair Yellow/White wire in cavity No. 5 of 14-pin connector for a short to ground. If ohmmeter is reading an open circuit, go to next step.
  6. Connect ohmmeter between Yellow/White wire in cavity No. 5 of 14-pin connector and Yellow/White wire of injector connectors No. 1 and 6. If ohmmeter is reading continuity, replace SMEC for a bad power board. Before replacing SMEC, ensure cavity No. 5 is not damaged causing a poor connection. If ohmmeter is not reading continuity, repair Yellow/White wire of cavity No. 5 for an open circuit to injector connector.
  7. Turn ignition off. Disconnect injector connector No. 6 from injector. Disconnect injector harness 4-pin connector from engine harness connector. Connect an ohmmeter between Yellow/White wire at injector No. 1 connector and Yellow/White wire at injector harness 4-pin connector. If ohmmeter is reading continuity, replace injector No. 1. If ohmmeter is not reading continuity, repair Yellow/White wire for an open circuit in injector harness.
    Fig 3: Ohmmeter Between No.1 Injector and Injector Harness 4-Pin Connector
    G12130
  8. Disconnect injector connector from injector No. 1. Connect injector connector No. 6 to injector No. 6. Leave connected for 10 seconds and listen for clicking noise. If injector No. 6 clicks, go to step 10). If injector No. 6 does not click, go to next step.
  9. Turn ignition off. Disconnect injector connector No. 6 from injector. Disconnect injector harness 4-pin connector from engine harness. Connect an ohmmeter between Yellow/White wire at injector No. 6 connector and Yellow/White wire at 4-pin injector harness connector. If ohmmeter is reading continuity, replace injector No. 6. If ohmmeter is not reading continuity, repair Yellow/White wire for an open circuit in injector harness.
    Fig 4: Ohmmeter and 14-Pin Connector
    G12131
  10. Disconnect injector connector from No. 6 injector. Connect injector connector No. 2 to injector No. 2. Leave connected for 10 seconds and listen for clicking noise. If injector No. 2 clicks, go to step 16). If injector No. 2 does not click go to next step. Ensure ATM Test "02" has not timed out before going to next step.
  11. Disconnect injector connector No. 2 from injector. Connect injector connector No. 3 to No. 3 injector. Leave connected for 10 seconds and listen for clicking noise. If injector No. 3 clicks, go to step 15). If injector No. 3 does not click, go to next step.
  12. Disconnect injector connector No. 3 from injector. Connect injector connector No. 1 to injector No. 2. Leave connected for 10 seconds and listen for clicking noise. Disconnect injector connector No. 1 from injector No. 2. Connect injector connector No. 1 to injector No. 3. Leave connected for 10 seconds and listen for clicking noise. If injectors No. 2 and 3 do not click, replace injectors No. 2 and 3. If one injector clicks and the other does not, replace injector which failed to click. If both injectors No. 2 and 3 clicked, go to next step.
  13. Turn ignition off. Disconnect 14-pin connector from SMEC. Connect an ohmmeter between Tan wire in cavity No. 10 and ground. If ohmmeter is reading continuity, repair Tan wire of cavity No. 10 for a short to ground. If ohmmeter is not reading continuity, go to next step.
    Fig 5: Ohmmeter Between Injector and 14-Pin Connector
    G12132
  14. Connect an ohmmeter between Tan wire in cavity No. 10 of 14-pin connector and Tan wire of injector connectors No. 2 and then No. 3. If ohmmeter is reading continuity, replace SMEC for a bad power board. Before replacing SMEC, check cavity No. 10 for damage causing a poor connection. If ohmmeter is not reading continuity, repair Tan wire of cavity No. 10 for an open circuit to injector harness connector.
  15. Turn ignition off. Disconnect injector connector from injector No. 3. Disconnect injector harness 4-pin connector from engine harness connector. Connect an ohmmeter between Tan wire at injector No. 2 connector and Tan wire at injector harness 4-pin connector. If ohmmeter is reading continuity, replace injector No. 2. If ohmmeter is not reading continuity, repair Tan wire for an open circuit in injector harness.
    Fig 6: Ohmmeter Between No. 2 Injector and Injector 4-Pin Connector
    G12133
  16. Disconnect injector connector No. 2. Connect injector connector No. 3 to injector No. 3. Leave connected for 10 seconds and listen for clicking noise. If injector No. 3 clicks, go to step 18). If injector No. 3 does not click, go to next step.
  17. Turn ignition off. Disconnect injector connector No. 3 from injector. Disconnect injector harness 4-pin connector from engine harness. Connect an ohmmeter between Tan wire at injector No. 3 connector and Tan wire at injector harness 4-pin connector. If ohmmeter is reading continuity, replace injector No. 3. If ohmmeter is not reading contintuity, repair Tan wire for an open circuit in injector harness.
    Fig 7: Ohmmeter Between No. 3 Injector and Injector 4-Pin Connector
    G12136
  18. Disconnect injector connector No. 3 from injector. Connect injector connector No. 4 to No. 4 injector. Leave connected for 10 seconds and listen for clicking noise. If injector No. 4 clicks, go to step 24). If injector No. 4 does not click, go to next step. Ensure ATM Test "02" has not timed out before going to next step.
  19. Disconnect injector connector No. 4 from injector. Connect injector connector No. 5 to injector No. 5. Leave connected for 10 seconds and listen for a click. If injector No. 5 clicks, go to step 23). If injector No. 5 does not click, go to next step.
  20. Disconnect injector connector No. 5 from injector. Connect injector connector No. 6 to injector No. 4. Leave connected for 10 seconds and listen for clicking noise. Disconnect injector connector No. 6 from injector No. 4. Connect injector connector No. 6 to injector No. 5. Leave connected for 10 seconds and listen for clicking noise. If injectors No. 4 and 5 do not click, replace injectors No. 4 and 5. If only one injector clicks, replace injector that did not click. If both injectors clicked, go to next step.
  21. Turn ignition off. Disconnect 14-pin connector from SMEC. Connect an ohmmeter between White wire in cavity No. 9 and ground. If ohmmeter is reading continuity, repair White wire of cavity No. 9 for a short to ground. If ohmmeter is not reading continuity, go to next step.
    Fig 8: Ohmmeter and No. 9 of 4-Pin Connector
    G12137
  22. Connect an ohmmeter between White wire in cavity No. 9 and White wire of injector connectors No. 4 and 5. If ohmmeter is reading continuity, replace SMEC for a bad power board. Before replacing SMEC, ensure cavity No. 9 is not damaged causing a poor connection. If ohmmeter is not reading continuity, repair White wire of cavity No. 9 for an open circuit to injector connectors.
    Fig 9: Ohmmeter Between No. 4 & 5 Injector and Injector 14-Pin Connector
    G12138
  23. Turn ignition off. Disconnect injector connector No. 5 from injector. Disconnect injector harness 4-pin connector from engine harness connector. Connect an ohmmeter between White wire at injector No. 4 and White wire at injector harness 4-pin connector. If ohmmeter is reading continuity, replace injector No. 4. If ohmmeter is not reading continuity, repair White wire for an open circuit in injector harness.
    Fig 10: Ohmmeter Between No. 4 Injector and Injector 14-Pin Connector
    G12139
  24. Turn ignition off. Disconnect injector connector No. 4 from injector. Disconnect injector harness 4-pin connector from engine harness connector. Connect an ohmmeter between White wire at injector No. 5 and White wire at injector harness 4-pin connector. If ohmmeter is reading continuity, replace injector No. 5. If ohmmeter is not reading continuity, repair White wire for an open circuit in injector harness.
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