Pinpoint Test D: No Power In Start - Non-Hybrid

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

D1 CHECK FOR VOLTAGE TO THE BJB
- Disconnect: BJB OTIS Diode.
- With the ignition in the START position, measure the voltage between BJB OTIS diode, circuit CDC35 (BU/WH), input side and ground.
  
  Fig 1: Checking Circuit CDC35
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?

Yes: GO to D5.
No: GO to D2.

D2 CHECK THE IGNITION START CIRCUIT FOR AN OPEN
- Ignition OFF.
- Disconnect: Ignition Switch C250.
- Measure the resistance between BJB OTIS diode, circuit CDC35 (BU/WH), input side and ignition switch C250-7, circuit CDC35 (BU/WH), harness side.
  
  Fig 2: Checking Circuit CDC35
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?

Yes: GO to D3.
No: REPAIR circuit CDC35 (BU/WH). TEST the system for normal operation.

D3 CHECK THE IGNITION START CIRCUIT FOR A SHORT TO GROUND
- Measure the resistance between ignition switch C250-7, circuit CDC35 (BU/WH), harness side and ground.
  
  Fig 3: Checking Circuit CDC35
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10,000 ohms?

Yes: GO to D10.
No: GO to D4.

D4 ISOLATE THE PCM FOR A SHORT TO GROUND
- Disconnect: PCM C175B.
- Measure the resistance between ignition switch C250-7, circuit CDC35 (BU/WH), harness side and ground.
  
  Fig 4: Checking Circuit CDC35
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10,000 ohms?

Yes: GO to D12.
No: REPAIR circuit CDC35 (BU/WH). TEST the system for normal operation.

D5 CHECK THE OTIS DIODE
- Test the OTIS diode.
- Is the OTIS diode OK?

Yes: GO to D6.
No: INSTALL a new OTIS diode. TEST the system for normal operation.

D6 CHECK FOR START CIRCUIT VOLTAGE AT THE PCM
- Ignition OFF.
- Connect: BJB OTIS Diode.
- Disconnect: PCM C175B.
- With the ignition in the START position, measure the voltage between ground and:
  - 2.5L and 3.0L: PCM C175B-16, circuit CDC35 (BU/WH), harness side.
  - 3.5L: PCM C175B-10, circuit CDC35 (BU/WH), harness side.
  Fig 5: Checking Circuit CDC35
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?

Yes: GO to D7.
No: REPAIR circuit CDC35 (BU/WH). TEST the system for normal operation.

D7 CHECK FOR START CIRCUIT VOLTAGE AT THE STARTER RELAY
- Disconnect: BJB Starter Relay.
- With the ignition in the START position, measure the voltage between BJB starter relay socket 86, circuit CE336 (GN/WH), harness side and ground.
  
  Fig 6: Checking Circuit CE336
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?

Yes: GO to D8.
No: REPAIR circuit CE336 (GN/WH). TEST the system for normal operation.

D8 CHECK FOR START CIRCUIT VOLTAGE AT THE PCM
- With the ignition in the START position, measure the voltage between ground and:
  - 2.5L and 3.0L: PCM C175B-37, circuit CE336 (GN/WH), harness side.
  - 3.5L: PCM C175B-19, circuit CE336 (GN/WH), harness side.
  Fig 7: Checking Circuit CE336
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?

Yes: GO to D9.
No: REPAIR circuit CE336 (GN/WH). TEST the system for normal operation.

D9 CHECK FOR VOLTAGE TO THE SJB
- Ignition OFF.
- Disconnect: SJBC2280B.
- With the ignition in the START position, measure the voltage between SJBC2280B-32, circuit CE336 (GN/WH), harness side and ground.
  
  Fig 8: Checking Circuit CE336 Or CDC35
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?

Yes: GO to D11.
No: REPAIR circuit CE336 (GN/WH). TEST the system for normal operation.

D10 CHECK THE IGNITION SWITCH
- Carry out the Ignition Switch component test. See within PINPOINT TEST I: THE IGNITION KEY CAN BE TURNED TO THE OFF POSITION WHEN THE SELECTOR LEVER IS NOT IN PARK
  Refer to COMPONENT TESTING (Except Hybrid) and/or COMPONENT TESTING (Hybrid) for component testing.
- Did the ignition switch pass the component test?

Yes: The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. TEST the system for normal operation.
No: INSTALL a new ignition switch. REFER to Removal and Installation . TEST the system for normal operation.

D11 CHECK FOR CORRECT SJBOPERATION
- Disconnect: All SJBconnectors.
- Check all SJBconnectors for:
  - corrosion.
  - pushed-out pins.
  - spread terminals.
- Connect: All SJBconnectors 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 SJB . REFER to INSTALLATION . TEST the system for normal operation.
No: The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector.

D12 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?

Yes: INSTALL a new PCM. REFER to INSTALLATION (2.5L) , INSTALLATION (3.0L) or INSTALLATION (3.5L) . TEST the system for normal operation.
No: The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector.