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Home >> Chevrolet >> 2006 >> Silverado 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1599 (Hybrid Energy Storage System) >> Diagnostic Information and Procedures >> DTC P1AE6 or P1AE7 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2010 GMC Sierra and 2010 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    WARNING: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal Protection Equipment (PPE) and proper procedures must be followed.
    The High Voltage Disabling procedure will perform the following tasks:
    • Identify how to disable high voltage.
    • Identify how to test for the presence of high voltage.
    • Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures must be followed.

    Before working on any high voltage system, be sure to wear the following Personal Protection Equipment:
    • Safety glasses with appropriate side shields when within 50 feet of the vehicle, either indoors or outdoors.
    • Certified and up-to-date Class "0" Insulation gloves rated at 1000V with leather protectors.
      • Visually and functionally inspect the gloves before use.
      • Wear the Insulation gloves at all times when working with the high voltage battery assembly, whether the system is energized or not.

    Failure to follow the procedures exactly as written may result in serious injury or death.
  1. Ignition OFF, disable the high voltage at the drive motor generator battery. Refer to High Voltage Disabling .
  2. Test for infinite resistance between the terminals listed below and ground;
    • positive contactor terminal X2
    • positive contactor terminal X3
    • negative contactor terminal X2
    • negative contactor terminal X3
    • If less than the specified value, replace the high voltage cable.
  3. Test for less than 1 Ω between the terminals listed below;
    • B+ (300 V) and positive contactor terminal X2
    • Ground (300 V) and negative contactor terminal X2
    • positive contactor terminal X3 and positive cable terminal X1
    • negative contactor terminal X3 and negative cable terminal X2
    • If greater than the specified range, replace the high voltage cable.
  4. Connect the 12 V battery.
  5. Ignition ON, command the negative and positive contactors and the current limit relay ON and OFF with a scan tool. Listen for the contactors and relay to turn ON and OFF.
  6. If all the circuit tests normal, replace the drive motor generator battery.
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