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Circuit/System Testing

NOTE:

You must perform the Circuit/System Verification before proceeding with Circuit/System Testing.

NOTE:

If a carbon pile tester and ammeter is available, refer to With Carbon Pile Tester section. Otherwise, refer to Without Carbon Pile Tester section.

With Carbon Pile Tester

    NOTE:

    Requires carbon pile tester rated to a minimum 200 amps along with either a built-in ammeter or a clamp-on ammeter.

  1. Ignition Off
    2. NOTE:

    If using a clamp-on ammeter, place it around the C1 Battery negative cable.

  2. Connect a carbon pile tester to the C1 Battery.
  3. Engine running and all accessories OFF. Observe the voltage reading on the tester and the Body Control Module Battery Voltage parameter in the Electric Power Management Data list. The voltage should read between 12.6 - 15.5 V.
  4. Adjust the carbon pile tester so that the ammeter is reading 120 A.
  5. Verify the voltage reading remains between 12.6 - 15.5 V.
    • If not within the specified range 

      Replace the component: K59 Starter/Generator Control Module

    • Go to next step: If within the specified range 
  6. All OK.

Without Carbon Pile Tester

  1. Engine running.
  2. Verify the scan tool Engine Control Module Ignition 1 Signal parameter continually increases and decreases when controlling the Engine Control Module 14 V Power Module Setpoint up and down with a scan tool. It may take up to 10 s for the battery voltage to stabilize between each setpoint change.
    • If the battery voltage does not continually increase 

      Replace the K59 Starter/Generator Control Module.

    • Go to next step: If the battery voltage continually increases 
  3. All OK.
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