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Pinpoint Test Ar: DTC U2472

NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
  1. AR1 CHECK THE IC RUN/START VOLTAGE SUPPLY 
    • Ignition OFF.
    • Disconnect: IC C220.
    • Ignition ON.
    • Measure the voltage between the IC C220-20, circuit CBP29 (WH/VT), harness side and ground.
      Fig 1: Measuring Voltage Between IC C220-20, Circuit CBP29 (WH/VT) And Ground
      G06257929Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
      • Yes  : GO to AR2.
      • No  : VERIFY the SJB fuse 29 (5A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the SYSTEM WIRING DIAGRAMS article to identify the possible causes of the circuit short. TEST the system for normal operation.
  2. AR2 CHECK THE SJB INPUT PIDs FROM THE IGNITION SWITCH 
    • Enter the following diagnostic mode on the scan tool: SJB DataLogger.
    • Select the ignition switch ACC (IGN_A_ECU), ignition switch OFF (IGN_O_ECU), ignition switch RUN (IGN_R_ECU), and ignition switch START (IGN_S_ECU) PIDs. Monitor the ignition switch PIDs while cycling the ignition switch from ACC, OFF, RUN and START.
    • Do the SJB PIDs match the ignition switch position? 
      • Yes  : GO to AR3.
      • No  : REFER to STEERING COLUMN SWITCHES article to diagnose the ignition switch outputs to the SJB.
  3. AR3 CHECK THE IC DTCs 
    • Enter the following diagnostic mode on the scan tool: IC Self-Test.
    • Clear the DTCs. Repeat the IC self-test.
    • Is DTC U2472 still present? 
      • Yes  : GO to AR4.
      • No  : The system is operating correctly at this time. The DTC may have been set due to high network traffic.
  4. AR4 CHECK FOR CORRECT SJB OPERATION 
    • Disconnect all the SJB connectors.
    • Check for:
      • corrosion
      • damaged pins
      • pushed-out pins
    • Connect all the SJB connectors and make sure they seat correctly.
    • Operate the system and verify that the concern is still present.
    • Is the concern still present? 
      • Yes  : INSTALL a new SJB. REFER to MULTIFUNCTION ELECTRONIC MODULES article. TEST the system for normal operation.

        If the concern remains, REINSTALL the original SJB and INSTALL a new IC. REFER to INSTRUMENT CLUSTER (IC) .. TEST the system for normal operation.

      • No  : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
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