Pinpoint Test A : Engine Does Not Crank

Refer to Starting System for schematic and connector information.

Normal Operation and Fault Conditions 

REFER to: Starting System - Vehicles With: Keyless Entry and Push Button Start - System Operation and Component Description .

DTC Fault Trigger Conditions 

Possible Sources 

• Battery
• Battery cables
• IPC
• Starter motor
• BJB starter relay

Visual Inspection and Diagnostic Pre-checks 

• Inspect the Run/start relay.
• Inspect the high current BJB connections.
• Verify the BJB fuse 84 (10A).
• Verify the BCM fuse 12 (7.5A).
• Inspect the Integrated Keyhead Transmitter (IKT).

1. A1 PERFORM INSPECTION AND VERIFICATION
   
   
   • Perform Inspection and Verification .

   Was an obvious cause for an observed or reported concern found? 

   Yes	Correct the cause as necessary.

   No

   GO to  A2

2. A2 CHECK FOR NO KEY DETECTED MESSAGE IN THE MESSAGE CENTER
   
   
   • NOTE: There are certain areas inside the vehicle where the IA key may not be detected and the message center displays NO KEY DETECTED. If the IA key is in the far outside edges of the interior (like in a door map pocket or above a sun visor) it might not be detected. Move the IA key to a different location and try to start the vehicle again.

     Check the message displayed in the message center while pressing the ignition switch - push button start.

   Is NO KEY DETECTED displayed? 

   Yes	Diagnose the NO KEY DETECTED concern. REFER to: Passive Anti-Theft System (PATS) .

   No

   GO to  A3

3. A3 VERIFY THE BCM (BODY CONTROL MODULE), IPC (INSTRUMENT PANEL CLUSTER) AND PCM (POWERTRAIN CONTROL MODULE) PASS THE NETWORK TEST
   
   
   • Ignition ON.
   • Using a diagnostic scan tool, perform the Network Test.

   Did the BCM, IPC and PCM pass the Network Test? 

   Yes

   GO to  A4

   No	REFER to: COMMUNICATIONS NETWORK (Except Hybrid) or appropriate service information .

4. A4 RETRIEVE DIAGNOSTIC TROUBLE CODES (DTCS)
   
   
   • Using a diagnostic scan tool, perform BCM and PCM self-tests.

   Are any Diagnostic Trouble Codes (DTCs) present? 

   Yes	For all BCM Diagnostic Trouble Codes (DTCs), refer to the BCM DTC Chart  . For PCM P06E9 GO to  A5 For all other PCM Diagnostic Trouble Codes (DTCs), REFER to: Electronic Engine Controls .

   No

   GO to  A5

5. A5 CHECK THE OPERATION OF THE STOPLAMPS
   
   
   • While observing the stoplamps, apply the brake pedal.

   Do the stoplamps illuminate? 

   Yes

   GO to  A6

   No	Diagnose All the Stoplamps are inoperative. REFER to: Stoplamps .

6. A6 CHECK THE BRAKE PEDAL POSITION (BOO1) PID (PARAMETER IDENTIFICATION)
   
   
   • Using a diagnostic scan tool, view PCM Parameter Identifications (PIDs)
   • Monitor the PCM B001 PID while applying the brake pedal.

   Does the PID read On? 

   Yes

   GO to  A8

   No

   GO to  A7

7. A7 CHECK THE BPP (BRAKE PEDAL POSITION) SWITCH CIRCUIT FOR VOLTAGE AT THE BCM (BODY CONTROL MODULE)
   
   
   • Ignition OFF.
   • Disconnect PCM C1551B.
   • While applying the brake pedal, measure:

     Positive Lead	Measurement / Action	Negative Lead
     C1551B-14	Courtesy of FORD MOTOR COMPANY	Ground

   Is the voltage greater than 11 volts? 

   Yes	GO to  A21

   No	REPAIR the circuit.

8. A8 CHECK BCM (BODY CONTROL MODULE) IGN_SW_STATE PID (PARAMETER IDENTIFICATION)
   
   
   • Using a diagnostic scan tool, view the BCM Parameter Identifications (PIDs).
   • Make sure the transmission is in PARK or NEUTRAL.
   • Monitor the BCMPID IGN_SW_STATE while pressing the ignition switch - push button start and the brake pedal.

   Does the PID change from Off to Start when the ignition switch - push button start and the brake pedal are pressed? 

   Yes

   GO to  A9

   No	DIAGNOSE No power in ON. REFER to: Steering Wheel and Column Electrical Components .

9. A9 CHECK THE PCM (POWERTRAIN CONTROL MODULE) IN GEAR-TRANSMISSION IS APPLYING A LOAD TO ENGINE (IN_GEAR) PID (PARAMETER IDENTIFICATION)
   
   
   • Using a diagnostic scan tool, view the PCM Parameter Identifications (PIDs).
   • Monitor the PCMPID IN_GEAR, while placing the gear selector in PARK and then NEUTRAL.

   Does the PID read No in both positions? 

   Yes	GO to  A10

   No	REFER to: Automatic Transmission - 2.5L Duratec (125kW/170PS) .

10. A10 CHECK THE PCM (POWERTRAIN CONTROL MODULE) ENGINE CRANKING (ENG_CRANK) PID (PARAMETER IDENTIFICATION)
    
    
    • Make sure the transmission is in PARK or NEUTRAL.
    • Using a diagnostic scan tool, view the PCM Parameter Identifications (PIDs).
    • Monitor the PCMPID ENG_CRANK while pressing the ignition switch - push button start and the brake pedal.

    Does the PID change from Inactive to Active? 

    Yes	GO to  A11

    No	GO to  A21

11. A11 CHECK THE STARTER RELAY CONTROL OPERATION
    
    
    NOTE: The following step uses a test light to simulate normal circuit loads. Use only the test light recommended in the Special Tools table at the beginning of this article. To avoid connector terminal damage, use the Flex Probe Kit for the test light probe connection to the vehicle. Do not use the test light probe directly on any connector.
    • Remove the BJB starter relay.
    • Measure:

      Positive Lead	Measurement / Action	Negative Lead
      Courtesy of FORD MOTOR COMPANY BJB starter relay pin 1	Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY BJB starter relay pin 2

    • Make sure the transmission is in PARK or NEUTRAL.
    • While pressing the ignition switch - push button start and the brake pedal, observe the test light.

    Does the test light illuminate when the ignition switch - push button start is pressed? 

    Yes	GO to  A12

    No	GO to  A19

12. A12 CHECK THE VOLTAGE TO THE STARTER RELAY
    
    
    • Measure:

      Positive Lead	Measurement / Action	Negative Lead
      Courtesy of FORD MOTOR COMPANY BJB starter relay pin 3	Courtesy of FORD MOTOR COMPANY	Ground

    Is the voltage greater than 11 volts? 

    Yes	GO to  A13

    No	VERIFY BJB fuse 84 (10A) is OK. If OK, REPAIR the circuit for an open. If not OK, REFER to OEM Electrical Wiring Diagram Introduction (Except Hybrid) to identify the possible causes of the circuit short.

13. A13 CHECK THE STARTER MOTOR OPERATION AT THE STARTER RELAY
    
    
    • Ignition OFF.
    • With the transmission in PARK or NEUTRAL, momentarily connect a fused jumper wire:

      Positive Lead	Measurement / Action	Negative Lead
      Courtesy of FORD MOTOR COMPANY BJB starter relay pin 3	Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY BJB starter relay pin 5

    Did the starter engage and the engine crank? 

    Yes	INSTALL a new starter relay.

    No	GO to  A14

14. A14 CHECK THE BATTERY GROUND CABLES
    
    
    • Measure:

      Positive Lead	Measurement / Action	Negative Lead
      Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY	Ground G108
      Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY	Ground G109

    Are the voltages greater than 11 volts? 

    Yes	GO to  A15

    No	CLEAN or INSTALL new negative battery cables as necessary. REFER to: Battery Cables - 2.5L Duratec (125kW/170PS) .

15. A15 CHECK THE STARTER MOTOR GROUND
    
    
    • Measure:

      Positive Lead	Measurement / Action	Negative Lead
      Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY Starter motor case

    Is the voltage greater than 11 volts? 

    Yes	GO to  A16

    No	CLEAN the starter motor mounting flange and MAKE SURE the starter motor is correctly mounted. REFER to: Starter Motor .

16. A16 CHECK THE VOLTAGE TO THE STARTER MOTOR
    
    
    • Measure:

      Positive Lead	Measurement / Action	Negative Lead
      C197A-1 ("B" terminal)	Courtesy of FORD MOTOR COMPANY	Ground

    Is the voltage greater than 11 volts? 

    Yes	GO to  A17

    No	INSTALL a new positive battery cable. REFER to: Battery Cables - 2.5L Duratec (125kW/170PS) .

17. A17 CHECK THE STARTER MOTOR FOR CORRECT OPERATION
    
    
    • Perform Starter Motor - Positive Circuit Test  .

    Was an obvious cause found? 

    Yes	Correct the cause as necessary.

    No	GO to  A18

18. A18 CHECK FOR START INPUT AT THE STARTER
    
    
    • Connect BJB starter relay.
    • Disconnect Starter solenoid C1715B.
    • While holding the key in the START position, measure:

      Positive Lead	Measurement / Action	Negative Lead
      C197B-1 ("S" terminal)	Courtesy of FORD MOTOR COMPANY	Ground

    Is the voltage greater than 11 volts? 

    Yes	CLEAN the starter solenoid "S" terminal and starter solenoid connector. CHECK the wiring and the starter motor for a loose or intermittent connection.

    No	REPAIR the circuit for an open.

19. A19 CHECK THE PCM (POWERTRAIN CONTROL MODULE) STARTER RELAY CIRCUITS FOR A SHORT TO GROUND
    
    
    • Ignition OFF.
    • Disconnect PCM C1551B.
    • Measure:

      Positive Lead	Measurement / Action	Negative Lead
      C1551B-62	Courtesy of FORD MOTOR COMPANY	Ground
      C1551B-68	Courtesy of FORD MOTOR COMPANY	Ground

    Are the resistances greater than 10, 000 ohms? 

    Yes	GO to  A20

    No	REPAIR the affected circuit.

20. A20 CHECK THE PCM (POWERTRAIN CONTROL MODULE) STARTER RELAY CIRCUITS FOR AN OPEN
    
    
    • Measure:

      Positive Lead	Measurement / Action	Negative Lead
      C1551B-62	Courtesy of FORD MOTOR COMPANY	BJB starter relay pin 2
      C1551B-68	Courtesy of FORD MOTOR COMPANY	BJB starter relay pin 1

    Are the resistances less than 3 ohms? 

    Yes	GO to  A21

    No	REPAIR the affected circuit.

21. A21 CHECK FOR CORRECT PCM (POWERTRAIN CONTROL MODULE) OPERATION
    
    
    • Ignition OFF.
    • Disconnect and inspect all PCM connectors.
    • Repair:
      • corrosion (install new connectors or terminals - clean module pins)
      • damaged or bent pins - install new terminals/pins
      • pushed-out pins - install new pins as necessary

    • Reconnect the PCM connectors. Make sure they seat and latch correctly.
    • Operate the system and determine if the concern is still present.

    Is the concern still present? 

    Yes	CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, Refer to PCM Guided Routine Testing .

    No	The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.