LEMON Manuals: Even more car manuals for everyone
Home >> Lincoln >> 2009 >> MKX FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 884 (Starting System) >> Diagnostic Tests >> Starting System >> Pinpoint Test >> Pinpoint Test A: The Engine Does Not Crank >> Pinpoint Test A: The Engine Does Not Crank

Pinpoint Test A: The Engine Does Not Crank

WARNING: This page is about a different car, the 2007 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.
  1. A1 CHECK THE BATTERY 
    1. YES  : Go to  A2.
    2. NO  : CHARGE or INSTALL a new battery as required. TEST the system for normal operation.
  2. A2 CHECK THE BATTERY GROUND CABLE 
    • Measure the voltage between the positive battery post and the battery ground cable connection at the cylinder block or the starter motor mounting stud bolt (for the 4.0L engine).
      Fig 1: Measuring Voltage Between Positive Battery Post & Battery Ground Cable Connection
      GF0005963Courtesy of FORD MOTOR CO.
    • Is the voltage reading greater than 10 volts? 
    1. YES  : Go to  A3.
    2. NO  : INSTALL a new battery ground cable. TEST the system for normal operation.
  3. A3 CHECK THE STARTER MOTOR GROUND 
    • Measure the voltage between the battery positive post and the starter motor case.
      Fig 2: Measuring Voltage Between Battery Positive Post & Starter Motor Case
      GF0005964Courtesy of FORD MOTOR CO.
    • Is the voltage reading greater than 10 volts? 
    1. YES  : Go to  A4.
    2. NO  : CLEAN the starter motor mounting flange and make sure the starter motor is correctly mounted. TEST the system for normal operation.
  4. A4 CHECK THE POWER SUPPLY TO THE STARTER MOTOR 
    • Measure the voltage at the starter motor B terminal.
      Fig 3: Measuring Voltage At Starter Motor B Terminal
      GF0000667Courtesy of FORD MOTOR CO.
    • Is the voltage reading greater than 10 volts? 
    1. YES  : Go to  A5.
    2. NO  : INSTALL a new positive battery cable. TEST the system for normal operation.
  5. A5 CHECK THE STARTER MOTOR B-TERMINAL 
    • Connect one end of a jumper wire to the B terminal of the starter motor and momentarily connect the other end to the starter solenoid S terminal.
      Fig 4: Connecting One End Of Jumper Wire To B Terminal Of Starter Motor
      GF0000668Courtesy of FORD MOTOR CO.
    • Does the starter motor engage and the engine crank? 
    1. YES  : Go to  A6.
    2. NO  : INSTALL a new starter motor. TEST the system for normal operation.
  6. A6 CHECK START INPUT TO THE STARTER MOTOR 
    • Disconnect: Stater S Connector
    • Key in START position.
    • Measure the voltage at the starter motor solenoid S terminal.
      Fig 5: Measuring Voltage At Starter Motor Solenoid S Terminal
      GF0009535Courtesy of FORD MOTOR CO.
    • Is the voltage reading greater than 10 volts? 
    1. YES  : CLEAN the starter solenoid S terminal and connector. CHECK the wiring and the starter motor for a loose or intermittent connection. TEST the system for normal operation.
    2. NO  : Go to  A7.
  7. A7 CHECK CIRCUIT CDC25 (BN/GN) FOR A SHORT TO GROUND 
    • Disconnect: Starter Solenoid S Connector
    • Measure the resistance between starter relay connector pin 30, circuit CDC25 (BN/GN) and ground.
      Fig 6: Measuring Resistance Between Starter Relay Connector Pin 30, Circuit CDC25 (BN/GN) & Ground
      GF0009536Courtesy of FORD MOTOR CO.
    • Is the resistance reading less than 10,000 ohms? 
    1. YES  : REPAIR circuit CDC25 (BN/GN) for a short to ground. CHECK BJB fuse 7 (40 A) for an open. INSTALL a new BJB fuse 7 (40 A) if necessary. TEST the system for normal operation.
    2. NO  : Go to  A8.
  8. A8 CHECK CIRCUIT CDC25 (BN/GN) FOR AN OPEN 
    • Measure the resistance of circuit CDC25 (BN/GN) between starter relay connector pin 30 and the starter solenoid S connector.
      Fig 7: Measuring Resistance Of Circuit CDC25 (BN/GN) Between Starter Relay Connector Pin 30
      GF0009537Courtesy of FORD MOTOR CO.
    • Is the resistance reading 5 ohms or less? 
    1. YES  : Go to  A9.
    2. NO  : REPAIR circuit CDC25 (BN/GN) for an open. TEST the system for normal operation.
  9. A9 CHECK THE BATTERY SUPPLY TO THE STARTER RELAY 
    • Key in OFF position.
    • Measure the voltage at starter relay connector pin 87, circuit SBB07 (WH/RD).
      Fig 8: Measuring Voltage At Starter Relay Connector Pin 87, Circuit SBB07 (WH/RD)
      GF0009538Courtesy of FORD MOTOR CO.
    • Is the voltage reading greater than 10 volts? 
    1. YES  : Go to  A13.
    2. NO  : Go to  A10.
  10. A10 CHECK BJB FUSE 7 (40A) FOR AN OPEN 
    • Key in OFF position.
    • Disconnect: BJB Fuse 7 (40A)
    • Check fuse: BJB Fuse 7 (40A)
    • Is the BJB fuse 7 (40A) open? 
    1. YES  : Go to  A11.
    2. NO  : Go to  A12.
  11. A11 CHECK CIRCUIT SBB07 (WH/RD) FOR A SHORT TO GROUND 
    • Measure the resistance between starter relay connector pin 87, circuit SBB07 (WH/RD) and ground.
      Fig 9: Measuring Resistance Between Starter Relay Connector Pin 87, Circuit SBB07 (WH/RD)
      GF0009539Courtesy of FORD MOTOR CO.
    • Is the resistance less than 10,000 ohms? 
    1. YES  : REPAIR circuit SBB07 (WH/RD) for a short to ground. INSTALL a new BJB fuse 7 (40A). TEST the system for normal operation.
    2. NO  : INSTALL a new BJB fuse 7 (40A). TEST the system for normal operation.
  12. A12 CHECK CIRCUIT SBB07 (WH/RD) FOR AN OPEN 
    • Measure the resistance between the output cavity of BJB fuse 7 (40A), circuit SBB07 (WH/RD) and starter relay connector pin 87, circuit SBB07 (WH/RD).
      Fig 10: Measuring Resistance Between Output Cavity Of BJB Fuse 7 (40A), Circuit SBB07 (WH/RD)
      GF0009540Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. YES  : INSTALL a new positive battery cable. TEST the system for normal operation.
    2. NO  : REPAIR circuit SBB07 for an open. TEST the system for normal operation.
  13. A13 CHECK THE START INPUT TO THE STARTER RELAY 
    • Key in START position.
    • Measure the voltage at the starter relay connector pin 86 (2.3L) or pin 85 (3.0L and 4.0L) circuit CBP21 (BU/GY).
      Fig 11: Measuring Voltage At Starter Relay Connector Pin 86 (2.3L) Or Pin 85 (3.0L & 4.0L)
      GF0009541Courtesy of FORD MOTOR CO.
    • Is the voltage reading greater than 10 volts? 
    1. YES  : Go to  A14.
    2. NO  : If the vehicle is equipped with a manual transmission, go to  A22 . If the vehicle is equipped with an automatic transmission, go to  A19 .
  14. A14 CHECK THE STARTER RELAY GROUND 
    • If the vehicle is equipped with a manual transmission, fully depress the clutch pedal.
    • Key in START position.
    • Measure the resistance between starter relay connector pin 85 (2.3L) or 86 (3.0L or 4.0L) circuit CDC12 (YE) and ground.
      Fig 12: Measuring Resistance Between Starter Relay Connector Pin 85 (2.3L) or 86 (3.0L or 4.0L) Circuit CDC12 (YE)
      GF0009542Courtesy of FORD MOTOR CO.
    • Is the resistance reading 5 ohms or less? 
    1. YES  : INSTALL a new starter relay. TEST the system for normal operation.
    2. NO  : Go to  A15.
  15. A15 CHECK CIRCUIT CDC12 (YE) FOR AN OPEN 
    • Disconnect: Powertrain Control Module (PCM) C175B
    • Measure the resistance between starter relay connector pin 85 (2.3L) or 86 (3.0L or 4.0L) circuit CDC12 (YE) and PCM connector C175B pin 2.
      Fig 13: Measuring Resistance Between Starter Relay Connector Pin 85 Or 86 Circuit CDC12 (YE) & PCM Connector C175B Pin 2
      GF0009543Courtesy of FORD MOTOR CO.
    • Is the resistance reading 5 ohms or less? 
    1. YES  : If the vehicle is equipped with a manual transmission, go to  A16 . If the vehicle is equipped with an automatic transmission, INSTALL a new PCM. TEST the system for normal operation.
    2. NO  : REPAIR circuit CDC12 (YE) for an open. TEST the system for normal operation.
  16. A16 CHECK CIRCUIT GD174 (BK/WH) FOR AN OPEN 
    • Disconnect: Clutch Pedal Position (CPP) Switch C257
    • Key in OFF position.
    • Measure the resistance between CPP switch C257 pin 5, circuit GD174 (BK/WH) and ground.
      Fig 14: Measuring Resistance Between CPP Switch C257 Pin 5, Circuit GD174 (BK/WH) & Ground
      GF0009544Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  A17.
    2. NO  : REPAIR circuit GD174 for an open. TEST the system for normal operation.
  17. A17 CHECK THE CPP SWITCH BOTTOM OF TRAVEL INPUT 
    • Connect: PCM C175B
    • Key in START position.
    • Measure the voltage at CPP switch C257 pin 6, circuit CDC36 (GN/BN).
      Fig 15: Measuring Voltage At CPP Switch C257 Pin 6, Circuit CDC36 (GN/BN)
      GF0009545Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    1. YES  : INSTALL a new CPP switch. TEST the system for normal operation.
    2. NO  : Go to  A18.
  18. A18 CHECK CIRCUIT CDC36 FOR AN OPEN 
    • Disconnect: PCM Connector C175B
    • Measure the resistance between PCM connector C175B pin 33, circuit CDC36 (GN/BN) and CPP connector C257 pin 6, circuit CDC36 (GN/BN).
      Fig 16: Measuring Resistance Between PCM Connector C175B Pin 33, Circuit CDC36 (GN/BN) & CPP Connector C257 Pin 6
      GF0009546Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. YES  : INSTALL a new PCM. TEST the system for normal operation.
    2. NO  : REPAIR circuit CDC36 for an open. TEST the system for normal operation.
  19. A19 CHECK CIRCUIT CPB21 (BU/GY) FOR A SHORT TO GROUND 
    • Disconnect: Transmission Range (TR) Sensor Connector C167
    • Measure the resistance between starter relay connector pin 86 (2.3L) or pin 85 (3.0L and 4.0L) circuit CPB21 (BU/GY) and ground
      Fig 17: Measuring Resistance Between Starter Relay Connector Pin 86 Or 85 Circuit CPB21 (BU/GY) & Ground
      GF0009542Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    1. YES  : Go to  A20.
    2. NO  : REPAIR circuit CPB21 (BU/GY) for a short to ground. TEST the system for normal operation.
  20. A20 CHECK THE TR SENSOR INPUT 
    • Key in START position.
    • Measure the voltage at TR sensor connector C167 pin 12, circuit CPB 21 (BU/GY).
      Fig 18: Measuring Voltage At TR Sensor Connector C167 Pin 12, Circuit CPB 21 (BU/GY)
      GF0009547Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    1. YES  : Go to  A21.
    2. NO  : Go to  A22.
  21. A21 CHECK THE TR SENSOR ADJUSTMENT 
    1. YES  : INSTALL a new TR sensor. CHECK the system for normal operation.
    2. NO  : ADJUST the TR sensor. REFER to AUTOMATIC TRANSMISSION - 5R44E AND 5R55E article. TEST the system for normal operation.
  22. A22 CHECK SJB FUSE 21 (5A) 
    • Disconnect: SJB Fuse 21 (5A)
    • Check fuse: SJB Fuse 21 (5A)
    • Is SJB fuse 21 (5A) OK? 
    1. YES  : Go to  A23 .
    2. NO  : Go to  A24.
  23. A23 CHECK THE INPUT TO SJB FUSE 21 (5A) 
    • Key in START position.
    • Measure the voltage at the input cavity of SJB fuse 21 (5A) circuit CBP21 (BU/GY).
      Fig 19: Measuring Voltage At Input Cavity Of SJB Fuse 21 (5A) Circuit CBP21 (BU/GY)
      GF0009548Courtesy of FORD MOTOR CO.
    • Is the voltage reading greater than 10 volts? 
    1. YES  : REPAIR circuit CBP21 (BU/GY) for an open. TEST the system for normal operation.
    2. NO  : Go to  A25.
  24. A24 CHECK CIRCUIT CBP21(BU/GY) FOR A SHORT TO GROUND 
    • Key in OFF position.
    • Measure the resistance between the output cavity of fuse junction panel fuse 21 (5A) circuit CBP21 (BU/GY) and ground.
      Fig 20: Measuring Resistance Between Output Cavity Of Fuse Junction Panel Fuse 21 (5A) Circuit CBP21 (BU/GY) & Ground
      GF0009549Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    1. YES  : INSTALL a new SJB fuse 21 (5A). TEST the system for normal operation.
    2. NO  : REPAIR circuit CBP21 (BU/GY) for a short to ground. INSTALL a new SJB fuse 21 (5A). TEST the system for normal operation.
  25. A25 CHECK THE SUPPLY TO THE IGNITION SWITCH 
    • Disconnect: Ignition Switch C213
    • Measure the voltage at ignition switch connector pin C250, pin 7, circuit SB09 (RD).
      Fig 21: Measuring Voltage At Ignition Switch Connector Pin C250, Pin 7, Circuit SB09 (RD)
      GF0009550Courtesy of FORD MOTOR CO.
    • Is the voltage reading greater than 10 volts? 
    1. YES  : Go to  A26.
    2. NO  : REPAIR circuit SBB09 (RD) for an open. TEST the system for normal operation.
  26. A26 CHECK CIRCUIT CDC35 (BU/WH) FOR AN OPEN 
    • Measure the resistance of circuit CDC35 (BU/WH) between ignition switch connector pin C250, pin 5 and input cavity of SJB fuse 21 (5A).
      Fig 22: Measuring Resistance Of Circuit CDC35 (BU/WH) Between Ignition Switch Connector Pin C250
      GF0009551Courtesy of FORD MOTOR CO.
    • Is the resistance reading 5 ohms or less? 
    1. YES  : INSTALL a new ignition switch. REFER to STEERING COLUMN SWITCHES article. TEST the system for normal operation.
    2. NO  : REPAIR circuit CDC35 (BU/WH) for an open. TEST the system for normal operation.
scientia non olet · About LEMON Manuals