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Pinpoint Test BH: DTC U300A:62 Or U300A:64

NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
  1. BH1 CHECK THE IPC RUN/START VOLTAGE SUPPLY 
    • Ignition OFF.
    • Disconnect: IPC C220.
    • Measure the voltage between the IPC C220-20, circuit CBP29 (WH/VT), harness side and ground.
      Fig 1: Measuring Voltage Between IPC C220-20, Circuit CBP29 (WH/VT), Harness Side And Ground
      G06257929Courtesy of FORD MOTOR CO.
    • Ignition ON.
    • Measure the voltage between the IPC C220-20, circuit CBP29 (WH/VT), harness side and ground.
      Fig 2: Measuring Voltage Between IPC C220-20, Circuit CBP29 (WH/VT), Harness Side And Ground
      G06257929Courtesy of FORD MOTOR CO.
    • Place the ignition in the START mode.
    • Measure the voltage between the IPC C220-20, circuit CBP29 (WH/VT), harness side and ground.
      Fig 3: Measuring Voltage Between IPC C220-20, Circuit CBP29 (WH/VT), Harness Side And Ground
      G06257929Courtesy of FORD MOTOR CO.
    • Is the voltage 0 volts in the OFF position and greater than 10 volts in the RUN and START modes? 
    1. Yes  : GO to BH2.
    2. No  : VERIFY the SJB fuse 29 (5A) is OK. If OK, REPAIR the circuit for an open. TEST the system for normal operation. If not OK, REFER to the SYSTEM WIRING DIAGRAMS article to identify the possible causes for the circuit short.
  2. BH2 CHECK THE SJB INPUT PIDs FROM THE IGNITION SWITCH 
    • Ignition ON.
    • Enter the following diagnostic mode on the scan tool: SJB DataLogger.
    • Select the SJB PIDs ignition ACC (IGN_A_ECU), ignition OFF (IGN_O_ECU), ignition RUN (IGN_R_ECU), and ignition START (IGN_S_ECU). Monitor the ignition PIDs while switching the ignition from ACC, OFF, RUN and START.
    • Do the SJB PIDs match the ignition mode? 
    1. Yes  : GO to BH3.
    2. No  : REFER to STEERING COLUMN SWITCHES article to diagnose the ignition outputs to the SJB.
  3. BH3 CHECK THE IPC DTCs 
    • Enter the following diagnostic mode on the scan tool: IPC Self-Test.
    • Repeat the IPC self-test. Clear the DTCs.
    • Is DTC U300A:62 or U300A:64 still present? 
    1. Yes  : INSTALL a new SJB. REFER to MULTIFUNCTION ELECTRONIC MODULES article. CLEAR the DTCs. REPEAT the self-test.

      If the DTC is still present, INSTALL a new IPC. REFER to INSTRUMENT PANEL CLUSTER (IPC) . TEST the system for normal operation.

    2. 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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