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Pinpoint Test C : No Power In On - Conventional Ignition Switch

WARNING: This page is about a different car, the 2020 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

  1. C1 CARRY OUT A NETWORK TEST

    • Ignition ON.

    • Using a diagnostic scan tool, carry out the network test.

    Does the BCM and the IPC pass the network test? 

    Yes  GO to  C2
    No  REFER to: Communications Network .

  2. C2 CHECK FOR BCM (BODY CONTROL MODULE) DTC (DIAGNOSTIC TROUBLE CODE) U300A:01

    • Using a diagnostic scan tool, carry out the BCM self-test.

    Is DTC U300A:01 present? 

    Yes  GO to Pinpoint Test K 
    No  GO to  C3

  3. C3 CHECK FOR BCM (BODY CONTROL MODULE) DTC (DIAGNOSTIC TROUBLE CODE) B1310:12 OR B1310:14

    • Using a diagnostic scan tool, carry out the BCM self-test.

    Is DTC B1310:12 or B1310:14 present? 

    Yes  GO to  C7
    No  GO to  C4

  4. C4 CHECK FOR VOLTAGE TO THE BCM (BODY CONTROL MODULE) WITH THE IGNITION SWITCH IN THE ON POSITION

    • Ignition OFF.

    • Disconnect BCM C2280B.

    • Ignition ON.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C2280B-37
      GFD458680Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the voltage greater than 11 volts? 

    Yes  GO to  C7
    No  VERIFY BCM fuse 18 (5A) is OK. If OK, GO to  C5
    If not OK, REFER to the OEM ELECTRICAL WIRING DIAGRAM INTRODUCTION to identify the possible cause of the circuit short.

  5. C5 CHECK THE IGNITION ON-DESIGNATED INPUT CIRCUIT FOR A SHORT TO GROUND

    • Ignition OFF.

    • Disconnect Ignition Switch C250.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C2280B-37
      GFD458681Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance less than 3 ohms? 

    Yes  REPAIR the circuit.
    No  GO to  C6

  6. C6 CHECK THE IGNITION ON-DESIGNATED INPUT CIRCUIT FOR AN OPEN

    • Ignition OFF.

    • Disconnect Ignition Switch C250.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C2280B-37
      GFD458681Courtesy of FORD MOTOR COMPANY
      		 C250-1

    Is the resistance less than 3 ohms? 

    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 ignition switch. REFER to: Ignition Switch .
    No  REPAIR the circuit.

  7. C7 CARRY OUT A NETWORK TEST

    • Using a diagnostic scan tool, perform the network test.

    Do the IPC and the BCM pass the network test? 

    Yes  GO to  C8
    No  DIAGNOSE an intermittent network concern. REFER to: Communications Network .

  8. C8 CHECK THE BJB (BATTERY JUNCTION BOX) RUN/START RELAY COIL CONTROL CIRCUIT FOR A SHORT TO VOLTAGE

    • Disconnect BJB C1035C.

    • Ignition ON.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C1035C-8
      GFD458680Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the voltage greater than 11 volts? 

    Yes  GO to  C9
    No  GO to  C10

  9. C9 ISOLATE THE BJB (BATTERY JUNCTION BOX) RUN/START RELAY COIL CONTROL CIRCUIT SHORT TO VOLTAGE

    • Disconnect BCM C2280F.

    • Ignition ON.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C2280F-25
      GFD458680Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the voltage greater than 11 volts? 

    Yes  REPAIR the circuit.
    No  INSTALL a new BJB.

  10. C10 CHECK THE BJB (BATTERY JUNCTION BOX) RUN/START RELAY COIL CONTROL CIRCUIT FOR AN OPEN

    • Ignition OFF.

    • Disconnect BCM C2280F.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C2280F-25
      GFD458681Courtesy of FORD MOTOR COMPANY
      		 C1035C-8

    Is the resistance less than 3 ohms? 

    Yes  GO to  C11
    No  REPAIR the circuit.

  11. C11 CHECK THE RUN/START RELAY CONTROL CIRCUIT FOR A SHORT TO GROUND

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C2280F-25
      GFD458681Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  C12
    No  REPAIR the circuit.

  12. C12 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION

    • Disconnect and inspect all BCM 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 BCM connectors and all other previously disconnected 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  Refer to BCM Guided Routine .
    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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