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Pinpoint Test A: The Engine Does Not Crank

WARNING: This page is about a different car, the 2006 Mercury Grand Marquis and 2006 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.
  1. A1 CHECK FOR POWERTRAIN CONTROL MODULE (PCM) DTCs 
    NOTE: The PATS DTCs are the only DTCs of concern in this step. Only repair retrieved non-PATS DTCs if a customer concern is reported.
    • Carry out the powertrain control module (PCM) self-test. Refer to the INTRODUCTION - GASOLINE article.
    • Were any PATS DTCs retrieved? 

    Yes  : REFER to ANTI-THEFT - PATS to repair the PATS DTCs before proceeding with this test.

    No  : GO to A2.

  2. A2 CHECK THE BATTERY 

    Yes  : GO to A3.

    No  : CHARGE or INSTALL a new battery as required. TEST the system for normal operation.

  3. A3 CHECK THE BATTERY GROUND CABLE 
      WARNING: If equipped with fire suppression system, depower the system. For important safety warnings and procedures, refer to FIRE SUPPRESSION SYSTEM .
    • With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to JACKING & LIFTING .
    • Measure the voltage between the positive battery post and the battery ground cable connection at the cylinder block.
      Fig 1: Measuring Voltage Between Positive Battery Post And Battery Ground Cable
      G04584103Courtesy of FORD MOTOR CO.
    • Is the voltage reading greater than 10 volts? 

    Yes  : GO to A4.

    No  : INSTALL a new battery ground cable. TEST the system for normal operation. If equipped with fire suppression system, GO to  A24.

  4. A4 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 And Starter Motor Case
      G04584104Courtesy of FORD MOTOR CO.
    • Is the voltage reading greater than 10 volts? 

    Yes  : GO to A5.

    No  : CLEAN the starter motor mounting flange and make sure the starter motor is correctly mounted. TEST the system for normal operation. If equipped with fire suppression system, GO to  A24.

  5. A5 CHECK THE POWER SUPPLY TO THE STARTER MOTOR 
    • Key in OFF position.
    • Measure the voltage at starter motor solenoid B-terminal.
      Fig 3: Checking Power Supply To Starter Motor
      G03882234Courtesy of FORD MOTOR CO.
    • Is the voltage reading greater than 10 volts? 

    Yes  : GO to A6.

    No  : INSTALL a new positive battery cable. TEST the system for normal operation. If equipped with fire suppression system, GO to  A24.

  6. A6 CHECK THE STARTER MOTOR 
    • Connect one end of a jumper wire to starter motor solenoid B-terminal and momentarily connect the other end to the starter motor solenoid S-terminal.
      Fig 4: Checking Starter Motor Solenoid Operation
      G03882235Courtesy of FORD MOTOR CO.
    • Does the starter motor engage and the engine crank? 

    Yes  : GO to A7.

    No  : INSTALL the starter motor. TEST the system for normal operation. If equipped with fire suppression system, GO to  A24.

  7. A7 CHECK START INPUT TO THE STARTER MOTOR 
    • Disconnect: Starter Motor Solenoid S-Terminal.
    • Hold the ignition switch to the START position.
    • Measure the voltage at the starter motor solenoid S-terminal.
      Fig 5: Measuring Voltage At Starter Motor Solenoid S-Terminal
      G04584107Courtesy of FORD MOTOR CO.
    • Is the voltage reading greater than 10 volts? 

    Yes  : CLEAN the starter motor solenoid S-terminal stud and connector. CHECK the wiring and the starter motor for a loose or intermittent connection. TEST the system for normal operation. If equipped with fire suppression system, GO to  A24.

    No  : GO to A8.

  8. A8 CHECK START INPUT TO THE STARTER RELAY 
    • Key in OFF position.
    • Disconnect: Starter Relay C1017.
    • Hold the ignition switch to the START position.
    • Measure the voltage at the battery junction box (BJB) at starter relay C1017-86, circuit 33 (WH/PK).
      Fig 6: Checking Start Input To Starter Relay
      G04584108Courtesy of FORD MOTOR CO.
    • Is the voltage reading greater than 10 volts? 

    Yes  : GO to A9.

    No  : GO to  A14.

  9. A9 CHECK THE BATTERY SUPPLY TO THE STARTER RELAY 
    • Key in OFF position.
    • Measure the voltage at the BJB at starter relay C1017-30, circuit 32 (RD/LB).
      Fig 7: Checking Battery Supply To Starter Relay
      G04584109Courtesy of FORD MOTOR CO.
    • Is the voltage reading greater than 10 volts? 

    Yes  : For police vehicles, GO to A10. For all other vehicles, GO to  A11.

    No  : REPAIR the open in circuit 32 (RD/LB). TEST the system for normal operation. If equipped with fire suppression system, GO to  A24.

  10. A10 CHECK THE STARTER RELAY GROUND 
    • Measure the resistance at the BJB between starter relay C1017-85, circuit 3405 (GY/RD) and ground. On police vehicles, measure the resistance at the BJB between starter relay C1017-85, circuit 57 (BK) and ground.
      Fig 8: Checking Starter Relay Ground
      G04584110Courtesy of FORD MOTOR CO.
    • Is the resistance reading less than 5 ohms? 

    Yes  : GO to  A12.

    No  : REPAIR circuit 3405 (GY/RD) or circuit 57 (BK) for an open. TEST the system for normal operation. If equipped with fire suppression system, GO to  A24.

  11. A11 CHECK CIRCUIT 33 (WH/PK) FOR AN OPEN 
    • Disconnect: PCM C175.
    • Measure the resistance at the BJB between starter relay C1017-85, circuit 33 (WH/PK) and PCM C175b-2, circuit 33 (WH/PK).
      Fig 9: Checking Circuit 33 (WH/PK) For An Open
      G04584111Courtesy of FORD MOTOR CO.
    • Is the resistance reading less than 5 ohms? 

    Yes  : GO to A12.

    No  : REPAIR circuit 33 (WH/PK). TEST the system for normal operation. If equipped with fire suppression system, GO to  A24.

  12. A12 CHECK CIRCUIT 113 (YE/LB) FOR A SHORT TO GROUND 
    • Disconnect: PCM Starter S-Terminal.
    • Measure the resistance at the BJB between starter relay C1017-87, circuit 113 (YE/LB) and ground.
      Fig 10: Checking Circuit 113 (YE/LB) For Short To Ground
      G04584112Courtesy of FORD MOTOR CO.
    • Is the resistance reading less than 10,000 ohms? 

    Yes  : REPAIR circuit 113 (YE/LB) for a short to ground. TEST the system for normal operation. If equipped with fire suppression system, GO to  A24.

    No  : GO to A13.

  13. A13 CHECK CIRCUIT 113 (YE/LB) FOR AN OPEN 
    • Measure the resistance at the BJB between starter relay C1017-87, circuit 113 (YE/LB) and starter motor solenoid S-terminal.
      Fig 11: Checking Circuit 113 (YE/LB) For An Open
      G04584113Courtesy of FORD MOTOR CO.
    • Is the resistance reading less than 5 ohms? 

    Yes  : INSTALL a new starter relay. TEST the system for normal operation. If equipped with fire suppression system, GO to  A24.

    No  : REPAIR circuit 113 (YE/LB) for an open. TEST the system for normal operation. If equipped with fire suppression system, GO to  A24.

  14. A14 CHECK FUSE 2.12 (10A) 
    • Key in OFF position.
    • Disconnect: Fuse 2.12 (10A).
    • Check fuse 2.12 (10A)
    • Measure the resistance of fuse 2.12 (10A).
    • Is the resistance of fuse 2.12 (10A) zero? 

    Yes  : GO to A15.

    No  : GO to  A21.

  15. A15 CHECK THE INPUT TO FUSE 2.12 (10A) 
    • Hold the ignition switch in the START position.
    • Measure the voltage at the input cavity of fuse 2.12 (10A).
      Fig 12: Measuring Voltage Input Cavity Of Fuse 2. 12 (10A)
      G04584114Courtesy of FORD MOTOR CO.
    • Is the voltage reading greater than 10 volts? 

    Yes  : GO to  A19.

    No  : GO to A16.

  16. A16 CHECK THE SUPPLY TO THE IGNITION SWITCH 
    • Disconnect: Ignition Switch C250.
    • Measure the voltage at ignition switch C250-B4, circuit 1715 (RD).
      Fig 13: Checking Supply To Ignition Switch
      G04584115Courtesy of FORD MOTOR CO.
    • Is the voltage reading greater than 10 volts? 

    Yes  : GO to A17.

    No  : REPAIR circuit 1715 (RD) for an open. TEST the system for normal operation. If equipped with fire suppression system, GO to  A24.

  17. A17 CHECK CIRCUIT 32 (RD/LB) FOR AN OPEN 
    • Measure the resistance of circuit 32 (RD/LB) between ignition switch C250-STA and the input cavity of fuse 2.12 (10A).
      Fig 14: Checking Circuit 32 (RD/LB) For Open
      G04584116Courtesy of FORD MOTOR CO.
    • Is the resistance reading less than 5 ohms? 

    Yes  : GO to A18.

    No  : REPAIR circuit 32 (RD/LB) for an open. TEST the system for normal operation. If equipped with fire suppression system, GO to  A24.

  18. A18 CHECK CIRCUIT 32 (RD/LB) FOR A SHORT TO GROUND 
    • Measure the resistance between ignition switch C250-STA, circuit 32 (RD/LB) and ground.
      Fig 15: Measuring Resistance Between Ignition Switch C250-STA, Circuit 32 (RD/LB) And Ground
      G04584117Courtesy of FORD MOTOR CO.
    • Is the resistance reading less than 10,000 ohms? 

    Yes  : REPAIR circuit 32 (RD/LB) for a short to ground. TEST the system for normal operation. If equipped with fire suppression system, GO to  A24.

    No  : INSTALL a new ignition switch. REFER to STEERING COLUMN SWITCHES . TEST the system for normal operation. If equipped with fire suppression system, GO to  A24.

  19. A19 CHECK CIRCUIT 262 (BN/PK) FOR AN OPEN 
    • Disconnect: Digital Transmission Range (TR) Sensor C167.
    • Measure the resistance between the digital TR sensor C167-12, circuit 262 (BN/PK) and fuse junction panel fuse 2.12 output cavity.
      Fig 16: Measuring Resistance Between Digital TR Sensor C167-12, Circuit 262 (BN/PK) And Fuse Junction Panel
      G04584118Courtesy of FORD MOTOR CO.
    • Is the resistance reading less than 5 ohms? 

    Yes  : GO to A20.

    No  : REPAIR circuit 262 (BN/PK) for an open. TEST the system for normal operation. If equipped with fire suppression system, GO to  A24.

  20. A20 CHECK CIRCUIT 33 (WH/PK) FOR AN OPEN 
    • Measure the resistance at the BJB between starter relay C1017-86, circuit 33 (WH/PK) and digital TR sensor C167-10.
      Fig 17: Checking Circuit 33 (WH/PK) For An Open
      G04584119Courtesy of FORD MOTOR CO.
    • Is the resistance reading less than 5 ohms? 

    Yes  : REFER to AUTOMATIC TRANSAXLE/TRANSMISSION , Digital Transmission Range Sensor Pinpoint Test. If equipped with fire suppression system, GO to  A24.

    No  : REPAIR circuit 33 (WH/PK) for an open. TEST the system for normal operation. If equipped with fire suppression system, GO to  A24.

  21. A21 CHECK FOR A SHORTED SYSTEM 
    • Disconnect the starter relay.
    • Measure the resistance between fuse junction panel fuse 2.12 output cavity, circuit 262 (BN/PK) and ground.
      Fig 18: Measuring Resistance Between Fuse Junction Panel Fuse 2. 12 Output Cavity And Ground
      G04584120Courtesy of FORD MOTOR CO.
    • Is the resistance reading greater than 10,000 ohms? 

    Yes  : INSPECT all circuits and connections. CHECK for chafed wires or an intermittent connection to ground. INSTALL a new fuse 2.12 (10A). TEST the system for normal operation. If equipped with fire suppression system, GO to  A24.

    No  : GO to A22.

  22. A22 CHECK CIRCUIT 262 (BN/PK) FOR A SHORT TO GROUND 
    • Disconnect: Digital TR Sensor C167.
    • Measure the resistance between digital TR sensor C167-12, circuit 262 (BN/PK) and ground.
      Fig 19: Measuring Resistance Between Digital TR Sensor C167-12, Circuit 262 (BN/PK) And Ground
      G04584121Courtesy of FORD MOTOR CO.
    • Is the resistance reading greater than 10,000 ohms? 

    Yes  : GO to A23.

    No  : REPAIR circuit 262 (BN/PK) for a short to ground. TEST the system for normal operation. If equipped with fire suppression system, GO to  A24.

  23. A23 CHECK CIRCUIT 33 (WH/PK) FOR A SHORT TO GROUND 
    • Measure the resistance between digital TR sensor C167-10, circuit 33 (WH/PK) and ground.
      Fig 20: Measuring Resistance Between Digital TR Sensor C167-10, Circuit 33 (WH/PK) And Ground
      G04584122Courtesy of FORD MOTOR CO.
    • Is the resistance reading greater than 10,000 ohms? 

    Yes  : REFER to AUTOMATIC TRANSAXLE/TRANSMISSION , Digital Transmission Range Sensor Pinpoint Test. If equipped with fire suppression system, GO to A24.

    No  : REPAIR circuit 33 (WH/PK) for a short to ground. TEST the system for normal operation. If equipped with fire suppression system, GO to A24.

  24. A24 REPOWER THE FIRE SUPPRESSION SYSTEM 
      WARNING: If equipped with fire suppression system, repower the system. For important safety warnings and procedures, refer to FIRE SUPPRESSION SYSTEM .
    • Verify that the fire suppression system is repowered. For additional information, refer to FIRE SUPPRESSION SYSTEM .
    • Is the fire suppression system repowered? 

    Yes  : Fire suppression system repowering is complete.

    No  : Refer to FIRE SUPPRESSION SYSTEM for diagnosis and testing of the fire suppression system.

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