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Test A: Charging System Test

  1. If engine electrical diagnostic system check was performed, go to next step. If engine electrical diagnostic system check was not performed, go to ENGINE ELECTRICAL DIAGNOSTIC SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM.
  2. Start engine and observe charge indicator on Instrument Panel Cluster, or charge message in Driver Information Center (DIC). If charge indicator light illuminates, or DIC displays a charging system message, go to next step. If charge indicator light does not illuminate or no message is present, problem may be intermittent. Check wiring and connections, and see PRELIMINARY INSPECTION  under TROUBLE SHOOTING.
    3. NOTE: Green POWER light on tester should remain illuminated while tester is being used.
  3. Turn ignition switch to OFF position. Using Charging System Electronic Generator Tester (J-41450-B), connect Red lead to generator output terminal, generator harness connector terminal "D" (Black wire) and Black lead to metal generator housing. If Green POWER light does not illuminate, go to next step. If Green POWER light illuminates, go to step  6 .
  4. Using DVOM measure voltage between output terminal of generator, generator harness connector terminal "D" (Black wire), and generator housing. If battery voltage is not present, go to next step. If battery voltage is present, go to step  14 .
  5. Using DVOM measure voltage from generator output terminal, generator harness connector terminal "D" (Black wire), to negative battery terminal. If battery voltage is present, go to step  12 . If battery voltage is not present, go to step  11 .
    6. CAUTION: Make sure load is completely turned off before connecting or disconnecting carbon pile load tester to battery.
  6. Connect carbon pile tester to battery. Connect inductive ammeter to output circuit of generator. Disconnect generator harness connector. Locate matching harness connector on electronic generator tester and connect it to generator. If Red DIAGNOSTIC light on tester illuminates, go to next step. If Red DIAGNOSTIC light does not illuminate, go to step  13 .
  7. Start engine and allow to idle for 30 seconds. Increase engine speed to 2500 RPM. If Red DIAGNOSTIC light does not illuminate, go to next step. If Red DIAGNOSTIC light illuminates, go to step  15 .
  8. Maintain engine speed at 2500 RPM. Turn on load of carbon pile tester and increase load until generator output is greater than or equal to generator load test value. See GENERATOR SPECIFICATIONS  . If Red DIAGNOSTIC light does not illuminate, go to next step. If Red DIAGNOSTIC light illuminates, go to step  15 .
  9. Maintain engine speed at 2500 RPM and continue to operate generator at test load value. Using DVOM measure voltage drop between generator output terminal, generator harness connector terminal "D" (Black wire), and positive battery terminal. If voltage drop is less than 0.5 volt, go to next step. If voltage drop is greater than 0.5 volt, go to step  11 .
  10. Maintain engine speed at 2500 RPM and continue to operate generator at test load value. Using DVOM measure voltage drop between generator metal housing and negative battery terminal. If voltage drop is greater than 0.5 volt, go to step  12 . If voltage drop is less than 0.5 volt, go to step  16 .
  11. Repair high resistance or open in generator output circuit between generator output terminal and positive battery terminal. See WIRING DIAGRAMS  . After repairs are made, go to step  16 .
  12. Repair high resistance or open in ground circuit of generator. See WIRING DIAGRAMS  . After repairs are made, go to step  16 .
  13. Disconnect electronic generator tester from generator, but leave alligator clips connected so Green POWER light remains on. Connect a jumper wire with an in-line 100-ohm resister between ground and generator harness connector terminal "B". If Red DIAGNOSTIC light does not illuminate, go to next step. If Red DIAGNOSTIC light illuminates, go to step  15 .
  14. There is a problem with the CS Electronic Generator Tester (J-41450-B). Refer to manufacturer's instructions, how to test the generator tester for proper operation. If tester has been repaired or replaced, go to step  3 .
  15. Replace generator. See GENERATOR  under REMOVAL & INSTALLATION. After repairs are made, go to next step.
  16. Retest system to verify repair. If condition was corrected, system is okay. If condition was not corrected, go to step  2 .
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