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Home >> Ford >> 2023 >> Escape Base, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1127 (Electric Powertrain Control - 3.3L DURATEC-V6 - Hybrid (BP) (Diagnosis & Testing - Removal & Installation)) >> Diagnosis And Testing >> Electric Powertrain Control >> Pinpoint Tests >> Pinpoint Test BH: U301B

Pinpoint Test BH: U301B

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  1. 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 U301B:00 Control Module Wake-up Circuit "A" Low: No Sub Type Information This DTC sets when a wiring fault in the wake-up circuit is detected.

    Possible Sources 

    • Wiring, terminals or connectors
    • BECM
    • DCDC
    • PCM

  2. BH1 CHECK THE WAKE-UP SIGNAL CIRCUIT FOR A SHORT TO GROUND

    • Ignition OFF.

    • Depower the high voltage battery.

    • Disconnect Inverter System Controller (ISC) C1458A .

    • Measure and record:
      Positive Lead Measurement / Action Negative Lead
      C1458A-J1
      GFD659137Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance greater than 10K ohms? 

    Yes  Refer to Electric Motor . Pinpoint Test Z.
    No  GO to  BH2

  3. BH2 CHECK THE WAKE-UP SIGNAL CIRCUIT FOR A SHORT TO GROUND WITH THE BECM (BATTERY ENERGY CONTROL MODULE) DISCONNECTED

    • Measure and record:
      Positive Lead Measurement / Action Negative Lead
      C1458A-J1
      GFD659137Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance greater than 10K ohms? 

    Yes  GO to  BH3
    No  GO to  BH4

  4. BH3 CHECK FOR CORRECT BECM (BATTERY ENERGY CONTROL MODULE) OPERATION

    • Disconnect and inspect all BECM connectors.

    • 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

    • Reconnect the BECM connectors. Make sure they seat and latch correctly.

    • Operate the system and determine if the concern is still present.

    Is the concern still 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 BECM. Refer to Battery Energy Control Module (BECM) - Hybrid Electric Vehicle (HEV) .
    No  The system is operating correctly at this time. The concern may have been caused by module connections. Address the root cause of any connector or pin issues.

  5. BH4 CHECK THE WAKE-UP SIGNAL CIRCUIT FOR A SHORT TO GROUND WITH THE DCDC (DIRECT CURRENT/DIRECT CURRENT CONVERTER CONTROL MODULE) DISCONNECTED

    • Measure and record:
      Positive Lead Measurement / Action Negative Lead
      C1458A-J1
      GFD659137Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance greater than 10K ohms? 

    Yes  GO to  BH5
    No  GO to  BH6

  6. BH5 CHECK FOR CORRECT DCDC (DIRECT CURRENT/DIRECT CURRENT CONVERTER CONTROL MODULE) OPERATION

    • Disconnect and inspect all DCDC connectors.

    • 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

    • Reconnect the DCDC connectors. Make sure they seat and latch correctly.

    • Operate the system and determine if the concern is still present.

    Is the concern still 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 DCDC. Refer to Direct Current/Direct Current (DC/DC) Converter Control Module .
    No  The system is operating correctly at this time. The concern may have been caused by module connections. Address the root cause of any connector or pin issues.

  7. BH6 CHECK THE WAKE-UP SIGNAL CIRCUIT FOR A SHORT TO GROUND WITH THE PCM (POWERTRAIN CONTROL MODULE) DISCONNECTED

    • Measure and record:
      Positive Lead Measurement / Action Negative Lead
      C1458A-J1
      GFD659137Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance greater than 10K ohms? 

    Yes  GO to  BH7
    No  REPAIR the circuit.

  8. BH7 CHECK FOR CORRECT PCM (POWERTRAIN CONTROL MODULE) OPERATION

    • Disconnect and inspect all PCM connectors.

    • 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

    • Reconnect the PCM connectors. Make sure they seat and latch correctly.

    • Operate the system and determine if the concern is still present.

    Is the concern still 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 PCM. Refer to the appropriate Electronic Engine Controls article.
    No  The system is operating correctly at this time. The concern may have been caused by module connections. Address the root cause of any connector or pin issues.
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