PINPOINT TEST F: DTCs B2844 AND U2472

WARNING: This page is about a different car, the 2010 Lincoln MKX and 2010 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Use the Flex Probe Kit for all test connections to prevent damage to the wiring terminals. Do not use standard multi-meter probes.

NOTE: Verify that battery voltage is 10 volts or greater.

F1 CHECK THE SJB DTCs
- Review the DTCs recorded during Inspection and Verification.
- Is DTC B2A20 present?
- Yes: GO to PINPOINT TEST E .
- No: GO to F2 .
F2 CHECK THE IGNITION SWITCH PIDs
- Connect the scan tool.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: DataLogger - SJB .
- Monitor the following ignition switch PIDs while cycling the ignition switch through each position:
  - ECU Derived Ignition State-OFF (IGN_O_ECU)
  - ECU Derived Ignition State-ACC (IGN_A_ECU)
  - ECU Derived Ignition State-RUN (IGN_R_ECU)
  - ECU Derived Ignition State-START (IGN_S_ECU)
- Does each PID display YES when the ignition switch is moved into the corresponding position and NO when the switch is moved to another position?
- Yes: The condition is not present at this time. INSPECT SJB connectors C2280A and C2280B for corrosion, spread terminals and/or pushed-out pins. REPAIR as necessary. CLEAR the DTCs. REPEAT the self-test.
- No: If IGN_A_ECU and/or IGN_R_ECU displayed YES at all times, GO to F3 .
  If IGN_S_ECU displayed YES at all times, GO to PINPOINT TEST E .
  
  If IGN_O_ECU displayed YES at all times, GO to PINPOINT TEST A .
  
  If IGN_A_ECU displayed NO at all times, GO to PINPOINT TEST B .
  
  If IGN_R_ECU displayed NO at all times, GO to PINPOINT TEST C .
  
  If IGN_S_ECU displayed NO at all times, GO to PINPOINT TEST D .
F3 ISOLATE THE SJB AND IGNITION CIRCUITS
- Disconnect: SJB C2280D.
- Disconnect: SJB C2280E.
- Measure the voltage between SJB C2280D-22, circuit CBP43 (GY) and ground.
  
  Fig 1: Measure Voltage Between SJB C2280D-22, Circuit CBP43 (GY) And Ground
  Courtesy of FORD MOTOR CO.
- Measure the voltage between SJB C2280E-10, circuit CBP45 (YE) and ground.
  
  Fig 2: Measuring Voltage Between SJB C2280E-10, Circuit CBP45 (YE) And Ground
  Courtesy of FORD MOTOR CO.
- Is any voltage present?
- Yes: REPAIR the affected circuit (s). CLEAR the DTCs. REPEAT the self-test.
- No: GO to F4 .
F4 CHECK THE SJB RUN/ACC INPUTS FOR A SHORT TO VOLTAGE
- Disconnect: SJB Fuse 43 (10A).
- Disconnect: SJB C2280B.
- Measure the voltage between SJB fuse 45 (5A), circuit CDC33 (VT/GN), input side and ground.
  
  Fig 3: Measuring Voltage Between SJB Fuse 45 (5A), Circuit CDC33 (VT/GN), Input Side And Ground
  Courtesy of FORD MOTOR CO.
- Measure the voltage between SJB C2280B-45, circuit CDC34 (WH/OG) and ground.
  
  Fig 4: Measuring Voltage Between SJB C2280B-45, Circuit CDC34 (WH/OG), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is any voltage present?
- Yes: REPAIR the affected circuit (s). CLEAR the DTCs. REPEAT the self-test.
- No: GO to F5 .
F5 CHECK FOR CORRECT SJB OPERATION
- Check SJB connectors C2280A, C2280B, C2280D and C2280E for:
  - corrosion.
  - pushed-out pins.
  - spread terminal.
- Connect: SJB C2280A.
- Connect: SJB C2280B.
- Connect: SJB C2280D.
- Connect: SJB C2280E.
- Make sure the connectors are seated correctly, then operate the system and verify the concern is still present.
- Is the concern still present?
- Yes: INSTALL a new SJB . REFER to MULTIFUNCTION ELECTRONIC MODULES . CLEAR the DTC. REPEAT the self-test.
- No: The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector.