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Home >> Ford >> 2009 >> Flex Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1593 (Steering Column Switches) >> Diagnostic Tests >> Steering Column Switches >> Pinpoint Tests >> Pinpoint Test F: DTCs B2844 and U2472 - Ignition Fault and Unexpected Ignition State >> PINPOINT TEST F: DTCs B2844 AND U2472 - IGNITION FAULT AND UNEXPECTED IGNITION STATE

PINPOINT TEST F: DTCs B2844 AND U2472 - IGNITION FAULT AND UNEXPECTED IGNITION STATE

WARNING: This page is about a different car, the 2009 Mercury Sable, 2009 Ford Taurus X, and 2009 Ford Taurus. 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.
  1. F1 CHECK THE IGNITION SWITCH 
    1. YES  : Go to  F2.
    2. NO  : INSTALL a new ignition switch. REFER to Ignition Switch . CLEAR the DTCs. REPEAT the self-test.
  2. F2 CHECK CIRCUIT CDC33 (VT/GN) FOR AN OPEN 
    • Key in OFF position.
    • Disconnect: SJB C2280a
    • Disconnect: Ignition Switch C250
    • Measure the resistance between ignition switch C250-6, circuit CDC33 (VT/GN), harness side and SJB C2280a-3, circuit CDC33 (VT/GN), harness side.
      • Fig 1: Measuring Resistance
      GF0042510Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  F3.
    2. NO  : REPAIR circuit CDC33 (VT/GN). CLEAR the DTCs. REPEAT the self-test.
  3. F3 CHECK CIRCUIT CDC33 (VT/GN) FOR A SHORT TO GROUND 
    • Measure the resistance between ignition switch C250-6, circuit CDC33 (VT/GN), harness side and ground.
      • Fig 2: Measuring Resistance Between Ignition Switch C250-6, Circuit CDC33 (VT/GN) & Ground
      GF0032059Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    1. YES  : Go to  F4.
    2. NO  : REPAIR circuit CDC33 (VT/GN). CLEAR the DTCs. REPEAT the self-test.
  4. F4 CHECK CIRCUIT CDC34 (WH/OG) FOR AN OPEN 
    • Disconnect: SJB C2280b
    • Disconnect: SJB C2280e
    • Disconnect: BJB Fuse 38 (10A)
    • Disconnect: BJB Fuse 39 (10A)
    • Measure the resistance between ignition switch C250-1, circuit CDC34 (WH/OG), harness side and SJB C2280b-45, circuit CDC34 (WH/OG), harness side.
      • Fig 3: Measuring Resistance
      GF0045951Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  F5.
    2. NO  : REPAIR circuit CDC34 (WH/OG). CLEAR the DTCs. REPEAT the self-test.
  5. F5 CHECK CIRCUIT CDC34 (WH/OG) FOR A SHORT TO GROUND 
    • Measure the resistance between ignition switch C250-1, circuit CDC34 (WH/OG), harness side and ground.
      • Fig 4: Measuring Resistance
      GF0042511Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    1. YES  : Go to  F6.
    2. NO  : REPAIR circuit CDC34 (WH/OG). CLEAR the DTCs. REPEAT the self-test.
  6. F6 CHECK CIRCUIT CDC35 (BU/WH) FOR AN OPEN 
    • Disconnect: OTIS Diode
    • Disconnect: PCM C175b
    • Measure the resistance between ignition switch C250-7, circuit CDC35 (BU/WH), harness side and:
      • the OTIS diode, circuit CDC35 (BU/WH), input side.
      • PCM C175b-9, circuit CDC35 (BU/WH), harness side.
      • Fig 5: Measuring Resistance
      GF0045948Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  F7.
    2. NO  : REPAIR circuit CDC35 (BU/WH). CLEAR the DTCs. REPEAT the self-test.
  7. F7 CHECK CIRCUIT CDC35 (BU/WH) FOR A SHORT TO GROUND 
    • Measure the resistance between ignition switch C250-7, circuit CDC35 (BU/WH), harness side and ground.
      • Fig 6: Measuring Resistance
      GF0042514Courtesy of FORD MOTOR CO.
    • Is the resistance greater then 10,000 ohms? 
    1. YES  : Go to  F8.
    2. NO  : REPAIR circuit CDC35 (BU/WH). CLEAR the DTCs. REPEAT the self-test.
  8. F8 CHECK CIRCUIT CE336 (GN/WH) FOR AN OPEN 
    • Measure the resistance between OTIS diode, circuit CE336 (GN/WH), output side and:
      • SJB C2280b-32, circuit CE336 (GN/WH), harness side.
      • PCM C175b-35, circuit CE336 (GN/WH), harness side.
      • Fig 7: Measuring Resistance
      GF0045952Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  F9.
    2. NO  : REPAIR circuit CE336 (GN/WH). CLEAR the DTCs. REPEAT the self-test.
  9. F9 CHECK CIRCUIT CE336 (GN/WH) FOR A SHORT TO GROUND 
    • Measure the resistance between OTIS diode, circuit CE336 (GN/WH), output side and ground.
      • Fig 8: Measuring Resistance
      GF0045953Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    1. YES  : Go to  F10.
    2. NO  : REPAIR circuit CE336 (GN/WH). CLEAR the DTCs. REPEAT the self-test.
  10. F10 CHECK CIRCUIT CDC33 (VT/GN) FOR A SHORT TO VOLTAGE 
    • Connect: SJB C2280a
    • Connect: SJB C2280b
    • Connect: SJB C2280e
    • Connect: Ignition Switch C250
    • Disconnect: SJB Fuse 45 (5A)
    • Key in ON position.
    • Measure the voltage between SJB fuse 45 (5A) input side, circuit CDC33 (VT/GN) and ground.
      • Fig 9: Measuring Voltage
      GF0045945Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    1. YES  : REPAIR circuit CDC33 (VT/GN). CLEAR the DTCs. REPEAT the self-test.
    2. NO  : Go to  F11.
  11. F11 CHECK CIRCUIT CDC34 (WH/OG) FOR A SHORT TO VOLTAGE 
    • Key in OFF position.
    • Disconnect: SJB Fuse 37 (10A)
    • Key in ON position.
    • Measure the voltage between SJB fuse 37 (10A) input side, circuit CDC34 (WH/OG) and ground.
      • Fig 10: Measuring Voltage
      GF0045954Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    1. YES  : REPAIR circuit CDC34 (WH/OG). CLEAR the DTCs. REPEAT the self-test.
    2. NO  : Go to  F12.
  12. F12 CHECK CIRCUIT CDC35 (BU/WH) FOR A SHORT TO VOLTAGE 
    • Measure the voltage between OTIS diode input side, circuit CDC35 (BU/WH) and ground.
      • Fig 11: Measuring Voltage
      GF0045949Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    1. YES  : REPAIR circuit CDC35 (BU/WH). CLEAR the DTCs. REPEAT the self-test.
    2. NO  : Go to  F13.
  13. F13 CHECK CIRCUIT CE336 (GN/WH) FOR A SHORT TO VOLTAGE 
    • Measure the voltage between OTIS diode output side, circuit CE336 (GN/WH) and ground.
      • Fig 12: Measuring Voltage
      GF0045950Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    1. YES  : REPAIR circuit CE336 (GN/WH). CLEAR the DTCs. REPEAT the self-test.
    2. NO  : Go to  F14.
  14. F14 CHECK THE SJB CONNECTORS 
    • Disconnect: SJB C2280a
    • Disconnect: SJB C2280b
    • Disconnect: SJB C2280e
    • Check the connectors for:
      • corrosion.
      • pushed-out pins.
      • spread terminals.
    • Connect: SJB C2280a
    • Connect: SJB C2280b
    • 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? 
    1. YES  : INSTALL a new SJB. REFER to MULTIFUNCTION ELECTRONIC MODULES article. CLEAR the DTCs. REPEAT the self-test.
    2. NO  : The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector.
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