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Pinpoint Test D: No Power In Start

WARNING: This page is about a different car, the 2010 Mercury Mariner and 2010 Ford Escape. 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. D1 ISOLATE THE START CIRCUIT 
    • Enter the following diagnostic mode on the scan tool: DataLogger - SJB  .
    • Ignition ON.
    • Monitor the Electronic Control Unit (ECU) derived ignition state-RUN (IGN_R_ECU) PID.
    • Does the PID display "yes" with the ignition in the RUN position? 
  2. D2 ISOLATE THE IGNITION SWITCH 
    • Ignition OFF.
    • Carry out the Ignition Switch - Electrical Component Test.

      Refer to COMPONENT TESTING (Except Hybrid),COMPONENT TESTING (Hybrid) for component testing.

    • Does the ignition switch pass the test? 
    • Yes:  GO to D3  .
    • No:  INSTALL a new ignition switch. REFER to IGNITION SWITCH . TEST the system for normal operation.
  3. D3 CHECK THE START CIRCUIT FOR AN OPEN 
    • Ignition OFF.
    • Disconnect: All vehicles:  Ignition Switch C250.
    • Disconnect: All vehicles:  PCM C175B.
    • Disconnect: Hybrid vehicles: SJB  C2280B.
    • Disconnect: Non-hybrid vehicles: OTIS  Diode.
    • Measure the resistance between ignition switch C250-7, circuit CDC35 (BU/WH), harness side and:
      • Non-hybrid vehicles: OTIS  diode, circuit CDC35 (BU/WH), input side.
      • Non-hybrid vehicles:  PCM C175B-16, circuit CDC35 (BU/WH), harness side.
      • Hybrid vehicles: SJB  C2280B-32, circuit CDC35 (BU/WH), harness side.
      • Hybrid vehicles:  PCM C175B-39, circuit CDC35 (BU/WH), harness side.
        Fig 1: Checking Circuit CDC35
        G06393355Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? 
    • Yes:  GO to D4  .
    • No:  REPAIR circuit CDC35 (BU/WH). TEST the system for normal operation.
  4. D4 CHECK THE START CIRCUIT FOR A SHORT TO GROUND 
    • Measure the resistance between ignition switch C250-7, circuit CDC35 (BU/WH), harness side and ground.
      Fig 2: Checking Circuit CDC35
      G06064025Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    • Yes:  GO to D5  .
    • No:  REPAIR circuit CDC35 (BU/WH). TEST the system for normal operation.
  5. D5 CHECK THE PCM FOR A SHORT TO GROUND 
    • Connect: PCM C175B.
    • Measure the resistance between ignition switch C250-7, circuit CDC35 (BU/WH), harness side and ground.
      Fig 3: Checking Circuit CDC35
      G06064025Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    • Yes: Hybrid vehicles:  GO to D6  .

      Non-hybrid vehicles:  GO to  D8.

    • No:  GO to  D7.
  6. D6 CHECK THE SJB FOR A SHORT TO GROUND 
    • Connect: SJB  C2280B.
    • Measure the resistance between ignition switch C250-7, circuit CDC35 (BU/WH), harness side and ground.
      Fig 4: Checking Circuit CDC35
      G06064025Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    • Yes:  INSTALL a new ignition switch. REFER to IGNITION SWITCH . TEST the system for normal operation.
    • No:  GO to  D12.
  7. D7 CHECK FOR CORRECT PCM OPERATION 
    • Disconnect: All PCM Connectors.
    • Check the connectors for:
      • corrosion.
      • spread terminals.
      • pushed-out pins.
    • Connect: All PCM Connectors.
    • Connect: All SJB  Connectors.
    • Connect: Ignition Switch C250.
    • Make sure the connectors seat properly, then operate the system and verify the concern is still present.
    • Is the concern still present? 
    • Yes:  INSTALL a new PCM. REFER to POWERTRAIN CONTROL MODULE (PCM) . 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. TEST the system for normal operation.
  8. D8 CHECK THE OTIS CIRCUIT FOR AN OPEN 
    • Disconnect: SJB  C2280B.
    • Disconnect: Starter Relay.
    • Measure the resistance between OTIS  diode, circuit CDC54 (WH/GN), output side and:
      • SJB  C2280B-32, circuit CDC54 (WH/GN), harness side.
      • PCM C175B-37, circuit CDC54 (WH/GN), harness side.
      • starter relay, circuit CDC54 (WH/GN), cavity 2.
        Fig 5: Checking Circuit CDC54
        G06393359Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes:  GO to D9  .
    • No:  REPAIR circuit CDC54 (WH/GN). TEST the system for normal operation.
  9. D9 CHECK THE OTIS CIRCUIT FOR A SHORT TO GROUND 
    • Measure the resistance between OTIS  diode, circuit CDC54 (WH/GN), output side and ground.
      Fig 6: Checking Circuit CDC54
      G06393360Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    • Yes:  GO to D10  .
    • No:  REPAIR circuit CDC54 (WH/GN). TEST the system for normal operation.
  10. D10 ISOLATE THE SJB 
    • Connect: SJB  C2280B.
    • Measure the resistance between OTIS  diode, circuit CDC54 (WH/GN), output side and ground.
      Fig 7: Checking Circuit CDC54
      G06393360Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    • Yes:  GO to D11  .
    • No:  GO to  D12.
  11. D11 ISOLATE THE PCM 
    • Connect: PCM C175B.
    • Measure the resistance between OTIS  diode, circuit CDC54 (WH/GN), output side and ground.
      Fig 8: Checking Circuit CDC54
      G06393360Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    • Yes:  INSTALL a new OTIS  diode. TEST the system for normal operation.
    • No:  GO to  D13.
  12. D12 CHECK FOR CORRECT SJB OPERATION 
    • Disconnect: SJB  C2280B.
    • Check the connectors for:
      • corrosion.
      • spread terminals.
      • pushed-out pins.
    • Connect: All PCM Connectors.
    • Connect: All SJB  Connectors.
    • Connect: OTIS  Diode.
    • Connect: Ignition Switch C250.
    • Make sure the connectors seat properly, then operate the system and verify the concern is still present.
    • Is the concern still present? 
    • Yes:  INSTALL a new SJB  . REFER to REMOVAL AND INSTALLATION . 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. TEST the system for normal operation.
  13. D13 CHECK THE PCM FOR CORRECT OPERATION 
    • Disconnect: All PCM Connectors.
    • Check the connectors for:
      • corrosion.
      • spread terminals.
      • pushed-out pins.
    • Connect: All PCM Connectors.
    • Connect: All SJB  Connectors.
    • Connect: OTIS  Diode.
    • Connect: Ignition Switch C250.
    • Make sure the connectors seat properly, then operate the system and verify the concern is still present.
    • Is the concern still present? 
    • Yes:  INSTALL a new PCM.

      2.5L engine:  REFER to POWERTRAIN CONTROL MODULE (PCM) .

      3.0L engine:  REFER to POWERTRAIN CONTROL MODULE (PCM) .

      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. TEST the system for normal operation.
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