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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 2648 (Steering Column Switches) >> Diagnosis And Testing >> Steering Column Switches >> Pinpoint Tests >> Pinpoint Test F: DTC B2A20 >> Pinpoint Test F: DTC B2A20

Pinpoint Test F: DTC B2A20

WARNING: This page is about a different car, the 2011 Mercury Milan, 2011 Lincoln MKZ, and 2011 Ford Fusion. 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 multimeter probes.
NOTE: Verify that battery voltage is 10 volts or greater.
  1. F1 CHECK THE IGNITION SWITCH MECHANICAL FUNCTION 
    • Inspect the ignition switch for correct mechanical function. Refer to the IGNITION SWITCH - MECHANICAL  in this service information.
    • Did the ignition switch pass the component test? 
    • Yes  : GO to F2  .
    • No  : INSTALL a new ignition switch. REFER to IGNITION SWITCH  in this service information. CLEAR the DTCs. REPEAT the self-test.
  2. F2 CHECK THE IGNITION SWITCH ELECTRICAL FUNCTION 
    • Yes  : GO to F3  .
    • No  : INSTALL a new ignition switch. REFER to IGNITION SWITCH  in this service information. CLEAR the DTCs. REPEAT the self-test.
  3. F3 CHECK THE SJB START POWER OUTPUT CIRCUIT FOR A SHORT TO VOLTAGE 
    • Connect: Ignition Switch C250.
    • Disconnect: SJB Fuse 28 (5A).
    • Ignition ON.
    • Measure the voltage between SJB fuse 28 (5A), circuit CBP28 (GY/ VT), output side and ground.
      Fig 1: Measuring Voltage Between SJB Fuse 28 (5A), Circuit CBP28 (GY/VT) And Ground
      G06094666Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    • Yes  : GO to  F10.
    • No  : For non-hybrid vehicles, GO to F4  .

      For hybrid vehicles, GO to  F9.

  4. F4 CHECK THE SJB START POWER INPUT CIRCUIT FOR A SHORT TO VOLTAGE 
    • Measure the voltage between SJB fuse 28 (5A), circuit CE336 (GN/ WH), input side and ground.
      Fig 2: Measuring Voltage Between SJB Fuse 28 (5A), Circuit CE336 (GN/ WH), Input Side And Ground
      G06500862Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    • Yes  : GO to F5  .
    • No  : GO to  F13.
  5. F5 ISOLATE THE SJB START POWER CIRCUIT 
    • Ignition OFF.
    • Disconnect: BJB One-Touch Integrated Start (OTIS) Diode.
    • Ignition ON.
    • Measure the voltage between SJB fuse 28 (5A), circuit CE336 (GN/ WH), input side and ground.
      Fig 3: Measuring Voltage Between SJB Fuse 28 (5A), Circuit CE336 (GN/ WH), Input Side And Ground
      G06500862Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    • Yes  : GO to F6  .
    • No  : GO to  F8.
  6. F6 CHECK THE PCM IGNITION SWITCH INPUT CIRCUIT FOR A SHORT TO VOLTAGE 
    • Ignition OFF.
    • Disconnect: SJB C2280B.
    • Ignition ON.
    • Measure the voltage between SJB C2280B-32, circuit CE336 (GN/ WH), harness side and ground.
      Fig 4: Measuring Voltage Between SJB C2280B-32, Circuit CE336 (GN/WH) And Ground
      G06094667Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    • Yes  : GO to F7  .
    • No  : GO to  F13.
  7. F7 CHECK THE PCM FOR A SHORT TO VOLTAGE 
    • Ignition OFF.
    • Disconnect: PCM C175B.
    • Ignition ON.
    • Measure the voltage between SJB C2280B-32, circuit CE336 (GN/ WH), harness side and ground.
      Fig 5: Measuring Voltage Between SJB C2280B-32, Circuit CE336 (GN/WH) And Ground
      G06094667Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    • Yes  : REPAIR circuit CE336 (GN/WH). CLEAR the DTCs. REPEAT the self-test.
    • No  : GO to  F15.
  8. F8 CHECK THE IGNITION SWITCH START POWER OUTPUT CIRCUIT FOR A SHORT TO VOLTAGE 
    • Ignition OFF.
    • Disconnect: PCM C175B.
    • Ignition ON.
    • Measure the voltage between BJB OTIS diode, circuit CDC35 (BU/ WH), input side and ground.
      Fig 6: Measuring Voltage Between BJB OTIS Diode, Circuit CDC35 (BU/WH) And Ground
      G06094671Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    • Yes  : REPAIR circuit CDC35 (BU/WH). CLEAR the DTCs. REPEAT the self-test.
    • No  : GO to  F15.
  9. F9 CHECK THE SJB IGNITION SWITCH INPUT CIRCUIT FOR A SHORT TO VOLTAGE 
    • Ignition OFF.
    • Disconnect: SJB C2280B.
    • Ignition ON.
    • Measure the voltage between SJB C2280B-32, circuit CDC35 (BU/ WH), harness side and ground.
      Fig 7: Measuring Voltage Between SJB C2280B-32, Circuit CDC35 (BU/WH) And Ground
      G06094667Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    • Yes  : REPAIR circuit CDC35 (BU/WH). CLEAR the DTCs. REPEAT the self-test.
    • No  : GO to  F13.
  10. F10 ISOLATE THE ACM 
    • Ignition OFF.
    • Disconnect: ACM C240A.
    • Ignition ON.
    • Measure the voltage between SJB fuse 28 (5A), circuit CBP28 (GY/ VT), output side and ground.
      Fig 8: Measuring Voltage Between SJB Fuse 28 (5A), Circuit CBP28 (GY/VT) And Ground
      G06094666Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    • Yes  : GO to F11  .
    • No  : GO to  F14.
  11. F11 ISOLATE THE PCM 
    • Ignition OFF.
    • Disconnect: PCM C175B.
    • Ignition ON.
    • Measure the voltage between SJB fuse 28 (5A), circuit CBP28 (GY/ VT), output side and ground.
      Fig 9: Measuring Voltage Between SJB Fuse 28 (5A), Circuit CBP28 (GY/VT) And Ground
      G06094666Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    • Yes  : GO to F12  .
    • No  : GO to  F15.
  12. F12 ISOLATE THE SJB 
    • Ignition OFF.
    • Disconnect: SJB C2280B.
    • Ignition ON.
    • Measure the voltage between SJB C2280B-2, circuit CBP28 (GY/VT), harness side and ground.
      Fig 10: Measuring Voltage Between SJB C2280B-2, Circuit CBP28 (GY/VT) And Ground
      G06094675Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    • Yes  : REPAIR circuit CBP28 (GY/VT). CLEAR the DTCs. REPEAT the self-test.
    • No  : GO to F13  .
  13. F13 CHECK FOR CORRECT SJB OPERATION 
    • Ignition OFF.
    • Disconnect: All SJB connectors.
    • Check the SJB connectors for:
      • corrosion.
      • pushed-out pins.
      • spread terminals.
    • Connect: All SJB connectors making sure that they are seated correctly.
    • 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 -- FUSION, MILAN & MKZ article. CLEAR the DTCs. REPEAT the self-test.
    • No  : The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.
  14. F14 CHECK FOR CORRECT ACM OPERATION 
    • Disconnect: All ACM connectors.
    • Check all ACM connectors for:
      • corrosion.
      • pushed-out pins.
      • spread terminals.
    • Connect: All ACM connectors making sure that all connectors are seated correctly.
    • Operate the system and verify the concern is still present.
    • Is the concern still present? 
    • Yes  : INSTALL a new ACM. REFER to INFORMATION & ENTERTAINMENT SYSTEMS -- FUSION, MILAN & MKZ article. CLEAR the DTCs. REPEAT the self-test.
    • No  : The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.
  15. F15 CHECK FOR CORRECT PCM OPERATION 
    • Disconnect: All PCM connectors.
    • Check all PCM connectors for:
      • corrosion.
      • pushed-out pins.
      • spread terminals.
    • Connect: All PCM connectors making sure that all connectors are seated correctly.
    • Operate the system and verify the concern is still present.
    • Is the concern still present? 
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