Pinpoint Test Ax: DTC U2472

NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

AX1 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
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes : GO to AX2.
- No : VERIFY the SJB fuse 29 (5A) is OK. If OK, REPAIR the circuit for an open. If not OK, REFER to the appropriate Systems Wiring Diagram to identify the possible causes of the circuit short. TEST the system for normal operation.
AX2 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 AX3.
- No : REFER to STEERING COLUMN SWITCHES to diagnose the ignition switch inputs to the SJB .
AX3 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 AX4.
- 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.
AX4 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 . TEST the system for normal operation.
  If the concern remains, REINSTALL the original SJB and GO to BB5.
- No : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
AX5 CHECK FOR CORRECT IC OPERATION
- Disconnect the IC connector.
- Check for:
  - corrosion
  - damaged pins
  - pushed-out pins
- Connect the IC connector and make sure it seats correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
- Yes : 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.