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Pinpoint Test Cp : P0E57

  1. NOTE: The Inverter System Controller (ISC) is referred to as the SOBDMC (Secondary On-Board Diagnostic Control Module C) in the scan tool.

    Normal Operation and Fault Conditions 

    REFER to: Electric Powertrain Control - System Operation and Component Description .

    DTC Fault Trigger Conditions 

    DTC Description Fault Trigger Condition
    SOBDMC P0E57:00 DC/DC Converter Input Voltage Too High: No Sub Type Information This DTC sets if the HV battery voltage reading is higher than the Inverter System Controller (ISC) hardware threshold.

    Possible Sources 

    • BECM unannounced contactor open
    • Internal high voltage battery/BECM issue
    • Vehicle collision
    • High voltage cables
    • Inverter System Controller (ISC)

  2. CP1 CHECK FOR BECM (BATTERY ENERGY CONTROL MODULE) CONTINUOUS MEMORY DIAGNOSTIC TROUBLE CODES (CMDTCS)

    NOTE: DTC P0E57 is expected to set in cases of unannounced contactor open (open fuse, HV circuits open, vehicle collision, or internal high voltage battery issue) in which case this DTC can be cleared from the ISC and the ISC should not be suspect.

    • Using a diagnostic scan tool, check for CMDTCs.

    Are any BECM CMDTCs present? 

    Yes  DIAGNOSE all BECM CMDTCs REFER to: High Voltage Battery, Mounting and Cables - Hybrid Electric Vehicle (HEV) .
    No  GO to  CP2

  3. CP2 CHECK FOR INVERTER SYSTEM CONTROLLER (ISC) DIAGNOSTIC TROUBLE CODES (DTCS)

    • Using a diagnostic scan tool, perform the Inverter System Controller (ISC) self-test.

    Are any DTCs other than P0E57 present? 

    Yes  DIAGNOSE all other Inverter System Controller (ISC) DTCs, REFER to Diagnostic Trouble Code (DTC) Chart .
    No  GO to  CP3

  4. CP3 VISUAL INSPECTION OF THE HIGH VOLTAGE SYSTEM

    • Ignition OFF.

    • Disconnect High voltage BJB C4236D.

    • Disconnect Inverter System Controller (ISC) C199C.

    • Repair:

      • corrosion (install new connector or terminals - clean module pins)
      • damaged or bent pins - install new terminals/pins
      • pushed-out pins - install new pins as necessary

    • Visually inspect all the high voltage cables.

    • Examine all the high voltage cables and connectors for damaged, burned or overheated insulation and loose or broken conditions.

    • Reconnect all high voltage cables.

    • Make sure all the high voltage connectors are correctly and securely connected and latched.

    Is a concern present? 

    Yes  REPAIR as necessary. CLEAR the Inverter System Controller (ISC) DTCs and REPEAT the self-test.
    No  GO to  CP4

  5. CP4 CHECK FOR INVERTER SYSTEM CONTROLLER (ISC) DIAGNOSTIC TROUBLE CODES (DTCS)

    • Using a diagnostic scan tool, clear the Inverter System Controller (ISC) DTCs.

    • Ignition OFF.

    • Wait 5 minutes.

    • Ignition ON.

    • Wait 10 seconds.

    • Using a diagnostic scan tool, perform the Inverter System Controller (ISC) self-test.

    Is P0E57:00 the only DTC present? 

    Yes  CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new Inverter System Controller (ISC). REFER to: Inverter System Controller [SOBDMC] .
    No  The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.
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