Pinpoint Test A: The Engine Does Not Crank

WARNING: This page is about a different car, the 2011 Mercury Milan, 2011 Lincoln MKZ, and 2011 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

A1 CHECK THE BATTERY
- Check the battery condition and charge. Refer to BATTERY, MOUNTING & CABLES -- FUSION, MILAN & MKZ article.
- Is the battery OK?
  Yes
  
  GO to A2.
  
  No
  
  CHARGE or INSTALL a new battery as necessary. REFER to BATTERY, MOUNTING & CABLES -- FUSION, MILAN & MKZ article. TEST the system for normal operation.
A2 CHECK THE PCM FOR DTCs
- Check for PCM DTCs.
- Were any PCM DTCs retrieved?
  YES
  
  If PCM DTC P1260 is retrieved, REFER to ANTI-THEFT - PASSIVE ANTI-THEFT SYSTEM (PATS) -- FUSION, MILAN & MKZ article. All other PCM DTCs, REFER to INTRODUCTION - GASOLINE MODELS article or INTRODUCTION -- FUSION HYBRID, MILAN HYBRID & MKZ HYBRID article.
  
  No
  
  For automatic transmission, GO to A3. For manual transmission, GO to A4.
A3 CHECK THE AUTOMATIC TR SENSOR
- Enter the following diagnostic mode on the scan tool: TCM DataLogger PID.
- While observing the Transmission Control Module (TCM) TR sensor PID, place the vehicle in PARK and NEUTRAL.
- Does the PID match the gear selection?
  YES
  
  GO to A5.
  
  No
  
  GO to the appropriate automatic transmission information to diagnose the TR sensor.
A4 CHECK THE CLUTCH CUTOFF SWITCH (CPP_ BOT) PID
- Enter the following diagnostic mode on the scan tool: DataLogger - PCM.
- While observing the CPP_ BOT PID, fully disengage the clutch.
- Does the PID change from NO to YES?
  YES
  
  GO to A5.
  
  No
  
  GO to A28.
A5 CHECK THE STARTER MOTOR CONTROL OUTPUT DETECTED (SMC_MON) PID
- Enter the following diagnostic mode on the scan tool: DataLogger - PCM.
- Monitor the PCM PID SMC_MON with the ignition switch in the START position.
- Does the PID change from OFF to ON?
  YES
  
  GO to A6.
  
  No
  
  GO to A13.
A6 CHECK THE STARTER MOTOR RELAY ENABLE (STRT_RLY) PID
- Enter the following diagnostic mode on the scan tool: DataLogger - PCM.
- Monitor the PCM PID STRT_RLY with the ignition switch in the START position.
- Does the PID change from DISABLED to ENABLED?
  YES
  
  GO to A7.
  
  No
  
  GO to A24.
A7 CHECK STARTER MOTOR RELAY POWER
NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
- Disconnect: Starter Motor Relay.
- Measure the voltage between Battery Junction Box (BJB) starter motor relay pin 30, circuit SBB05 (GY/RD), harness side and ground.
  
  Fig 1: Checking Starter Motor Relay Power
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
  YES
  
  GO to A8.
  
  No
  
  VERIFY BJB fuse 5 (30A) is OK. If OK, REPAIR circuit SBB05 (GY/RD). TEST the system for normal operation. If not OK, REFER to the SYSTEM WIRING DIAGRAMS article, to identify the possible causes of the circuit short.
A8 CHECK THE BATTERY GROUND CABLE
- Measure the voltage between the positive battery post and the battery ground cable connection at the engine.
  
  Fig 2: Measuring Voltage Between Positive Battery Post And Battery Ground Cable Connection At Engine
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
  YES
  
  GO to A9.
  
  No
  
  INSTALL a new battery ground cable. REFER to BATTERY, MOUNTING & CABLES -- FUSION, MILAN & MKZ article. TEST the system for normal operation.
A9 CHECK THE STARTER MOTOR GROUND
- Measure the voltage between the positive battery post and the starter motor case.
  
  Fig 3: Checking Starter Motor Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
  YES
  
  GO to A10.
  
  No
  
  CLEAN the starter motor mounting flange and make sure the starter motor is correctly mounted. TEST the system for normal operation.
A10 CHECK THE POWER SUPPLY TO THE STARTER MOTOR
- Measure the voltage between starter motor C197A, circuit SDC02 (RD) and ground.
  
  Fig 4: Measuring Voltage Between Starter Motor C197A, Circuit SDC02 (RD) And Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
  YES
  
  GO to A11.
  
  No
  
  INSTALL a new positive battery cable. REFER to BATTERY, MOUNTING & CABLES -- FUSION, MILAN & MKZ article. TEST the system for normal operation.
A11 CHECK THE STARTER MOTOR B-PIN
- Connect one end of a fused (30A) jumper wire to starter motor solenoid 197A, circuit SDC02 (RD). Momentarily connect the other end of the jumper to starter motor C197B, circuit CDC25 (BN/GN).
  
  Fig 5: Checking Starter Motor B-Pin
  Courtesy of FORD MOTOR CO.
- Did the starter motor engage and the engine crank?
  YES
  
  GO to A12.
  
  No
  
  INSTALL a new starter motor. REFER to STARTER MOTOR - 2.5L , STARTER MOTOR - 3.0L or STARTER MOTOR - 3.5L in this service information. TEST the system for normal operation.
A12 CHECK THE CIRCUIT TO THE STARTER MOTOR
NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
- Ignition OFF.
- Disconnect: Starter Motor Relay.
- Disconnect: Starter Motor Solenoid C197B.
- Measure the resistance between starter motor solenoid S-terminal C197B, circuit CDC25 (BN/GN), harness side and the BJB starter motor relay pin 87, circuit CDC25 (BN/GN), harness side.
  
  Fig 6: Checking Circuit To Starter Motor
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
  YES
  
  INSTALL a new starter motor relay. TEST the system for normal operation.
  
  No
  
  REPAIR circuit CDC25 (BN/GN). TEST the system for normal operation.
A13 CHECK STARTER MOTOR RELAY POWER
NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
- Disconnect: Starter Motor Relay.
- Measure the voltage between BJB starter motor relay pin 30, circuit SBB05 (GY/RD), harness side and ground.
  
  Fig 7: Checking Starter Motor Relay Power
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
  YES
  
  GO to A14.
  
  No
  
  VERIFY BJB fuse 5 (30A) is OK. If OK, REPAIR circuit SBB05 (GY/RD). TEST the system for normal operation. If not OK, REFER to the SYSTEM WIRING DIAGRAMS article, to identify the possible causes of the circuit short.
A14 CHECK THE STARTER MOTOR RELAY
- Carry out the Starter Motor Relay Component Test. Refer to COMPONENT TESTING -- FUSION HYBRID, MILAN HYBRID & MKZ HYBRID article, or COMPONENT TESTING -- FUSION, MILAN & MKZ (EXCEPT HYBRID) article for component testing.
- Did the starter motor relay pass the component test?
  YES
  
  GO to A15.
  
  No
  
  INSTALL a new starter motor relay. TEST the system for normal operation.
A15 CHECK THE START DIODE
- Disconnect: Start Diode.
- Check the start diode for an open or shorted condition.
  
  Fig 8: Checking Start Diode For Open Or Shorted Condition
  Courtesy of FORD MOTOR CO.
- Is the start diode OK?
  YES
  
  GO to A16.
  
  No
  
  INSTALL a new start diode. TEST the system for normal operation.
A16 CHECK THE START SIGNAL TO THE STARTER MOTOR RELAY
- Connect: Start Diode.
- Measure the voltage between the BJB starter motor relay pin 86, circuit CE336 (GN/WH), harness side and ground with the ignition switch in the START position.
- Is the voltage greater than 10 volts?
  YES
  
  For 2.5L and 3.0L vehicles, GO to A20. For 3.5L vehicles, GO to A22.
  
  No
  
  GO to A17.
A17 CHECK CIRCUIT CE336 (GN/WH) FOR AN OPEN BETWEEN START DIODE AND STARTER RELAY
- Disconnect: Start Diode.
- Measure the resistance between the start diode, circuit CE336 (GN/WH), harness side and BJB starter motor relay pin 86, circuit CE336 (GN/WH), harness side.
  
  Fig 10: Checking Circuit CE336 (GN/WH) For Open Between Start Diode And Starter Relay
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
  YES
  
  GO to A18.
  
  No
  
  REPAIR circuit CE336 (GN/WH) for an open. TEST the system for normal operation.
A18 CHECK CIRCUIT SBP27 (BU/RD) FOR VOLTAGE
- Connect: Starter Motor Relay.
- Connect: Start Diode.
- Disconnect: Ignition Switch C250.
- Measure the voltage between ignition switch C250-4, circuit SBP27 (BU/RD), harness side and ground.
  
  Fig 11: Measuring Voltage Between Ignition Switch C250-4, Circuit SBP27 (BU/RD) And Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
  YES
  
  GO to A19.
  
  No
  
  VERIFY SJB fuse 27 (20 A) is OK. If OK, REPAIR circuit SBP27 (BU/RD) for an open. TEST the system for normal operation. If not OK, REFER to the SYSTEM WIRING DIAGRAMS article, to identify the possible causes of the circuit short.
A19 CHECK THE IGNITION SWITCH
- Carry out the Ignition Switch Component Test. Refer to IGNITION SWITCH article for hybrid or IGNITION SWITCH article for component testing.
- Did the ignition switch pass the component test?
  YES
  
  REPAIR circuit CDC35 (BU/WH) for an open. TEST the system for normal operation.
  
  No
  
  INSTALL a new ignition switch. REFER to STEERING COLUMN SWITCHES article. TEST the system for normal operation.
A20 CHECK CIRCUIT CDC35 (BU/WH) FOR AN OPEN
- Connect: Starter Motor Relay.
- Disconnect: PCM C175B.
- Disconnect: Start Diode.
- Measure the resistance between the start diode cell, circuit CDC35 (BU/WH), harness side and PCM C175B-16, circuit CDC35 (BU/WH), harness side.
  
  Fig 12: Checking Circuit CDC35
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
  YES
  
  GO to A21.
  
  No
  
  REPAIR circuit CDC35 (BU/WH) for an open. TEST the system for normal operation.
A21 CHECK THE CIRCUIT CE336 (GN/WH) BETWEEN THE BJB AND THE PCM
- Connect: Start Diode.
- Ignition OFF.
- Measure the resistance between the BJB starter motor relay pin 86, circuit CE336 (GN/WH), harness side and PCM C175B-37, circuit CE336 (GN/WH), harness side.
  
  Fig 13: Checking Circuit CE336
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
  YES
  
  INSTALL a new PCM. REFER to ELECTRONIC ENGINE CONTROLS - 2.5L -- FUSION & MILAN (EXCEPT HYBRID) article, ELECTRONIC ENGINE CONTROLS - 3.0L (4V) -- FUSION & MILAN article or ELECTRONIC ENGINE CONTROLS - 3.5L -- FUSION & MKZ article. TEST the system for normal operation.
  
  No
  
  REPAIR circuit CE336 (GN/WH). TEST the system for normal operation.
A22 CHECK CIRCUIT CDC35 (BU/WH) FOR AN OPEN
- Connect: Starter Motor Relay.
- Disconnect: PCM C175B.
- Disconnect: Start Diode.
- Measure the resistance between the start diode cell, circuit CDC35 (BU/WH), harness side and PCM C175B-10, circuit CDC35 (BU/WH), harness side.
  
  Fig 14: Checking Circuit CDC35
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
  YES
  
  GO to A23.
  
  No
  
  REPAIR circuit CDC35 (BU/WH) for an open. TEST the system for normal operation.
A23 CHECK CIRCUIT CE336 (GN/WH) BETWEEN THE BJB AND THE PCM
- Ignition OFF.
- Connect: Start Diode.
- Measure the resistance between the BJB starter motor relay pin 86, circuit CE336 (GN/WH), harness side and PCM C175B-19, circuit CE336 (GN/WH), harness side.
  
  Fig 15: Checking Circuit CE336 (GN/WH) Between BJB And PCM
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
  YES
  
  INSTALL a new PCM. REFER to ELECTRONIC ENGINE CONTROLS - 2.5L -- FUSION & MILAN (EXCEPT HYBRID) article, ELECTRONIC ENGINE CONTROLS - 3.0L (4V) -- FUSION & MILAN article or ELECTRONIC ENGINE CONTROLS - 3.5L -- FUSION & MKZ article. TEST the system for normal operation.
  
  No
  
  REPAIR circuit CE336 (GN/WH). TEST the system for normal operation.
A24 CHECK STARTER MOTOR RELAY POWER
NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
- Disconnect: Starter Motor Relay.
- Measure the voltage between BJB starter motor relay pin 30, circuit SBB05 (GY/RD), harness side and ground.
  
  Fig 16: Checking Starter Motor Relay Power
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
  YES
  
  GO to A25.
  
  No
  
  VERIFY BJB fuse 5 (30A) is OK. If OK, REPAIR circuit SBB05 (GY/RD). TEST the system for normal operation. If not OK, REFER to the SYSTEM WIRING DIAGRAMS article, to identify the possible causes of the circuit short.
A25 CHECK THE STARTER MOTOR RELAY
- Carry out the Starter Motor Relay Component Test. Refer to COMPONENT TESTING -- FUSION HYBRID, MILAN HYBRID & MKZ HYBRID article, or COMPONENT TESTING -- FUSION, MILAN & MKZ (EXCEPT HYBRID) article for component testing.
- Did the starter motor relay pass the component test?
  YES
  
  For 2.5L and 3.0L vehicles, GO to A26. For 3.5L vehicles, GO to A27.
  
  No
  
  INSTALL a new starter motor relay. TEST the system for normal operation.
A26 CHECK CIRCUIT CDC12 (YE) FOR AN OPEN
- Disconnect: PCM C175B.
- Measure the resistance between the BJB starter relay pin 85, circuit CDC12 (YE), harness side and PCM C175B-7, circuit CDC12 (YE), harness side.
  
  Fig 17: Measuring Resistance Between BJB Starter Relay Pin 85 And PCM C175B-7, Circuit CDC12 (YE)
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
  YES
  
  INSTALL a new PCM. REFER to ELECTRONIC ENGINE CONTROLS - 2.5L -- FUSION & MILAN (EXCEPT HYBRID) article, ELECTRONIC ENGINE CONTROLS - 3.0L (4V) -- FUSION & MILAN article or ELECTRONIC ENGINE CONTROLS - 3.5L -- FUSION & MKZ article. TEST the system for normal operation.
  
  No
  
  REPAIR circuit CDC12 (YE). TEST the system for normal operation.
A27 CHECK CIRCUIT CDC12 (YE) FOR AN OPEN
- Disconnect: PCM C175B.
- Measure the resistance between the BJB starter relay pin 85, circuit CDC12 (YE), harness side and PCM C175B-34, circuit CDC12 (YE), harness side.
  
  Fig 18: Measuring Resistance Between BJB Starter Relay Pin 85 And PCM C175B-34, Circuit CDC12 (YE)
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
  YES
  
  INSTALL a new PCM. REFER to ELECTRONIC ENGINE CONTROLS - 2.5L -- FUSION & MILAN (EXCEPT HYBRID) article, ELECTRONIC ENGINE CONTROLS - 3.0L (4V) -- FUSION & MILAN article or ELECTRONIC ENGINE CONTROLS - 3.5L -- FUSION & MKZ article. TEST the system for normal operation.
  
  No
  
  REPAIR circuit CDC12 (YE). TEST the system for normal operation.
A28 CHECK CIRCUIT GD120 (BK/GN) FOR AN OPEN
- Ignition OFF.
- Disconnect: Clutch Cutoff Switch C2072.
- Measure the resistance between clutch cutoff switch C2072-2, circuit GD120 (BK/GN), harness side and ground.
  
  Fig 19: Measuring Resistance Between Clutch Cutoff Switch C2072-2, Circuit GD120 (BK/GN) And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
  YES
  
  GO to A29.
  
  No
  
  REPAIR circuit GD120 (BK/GN). TEST the system for normal operation.
A29 CHECK CIRCUIT CE903 (BU/OG) FOR AN OPEN
- Ignition OFF.
- Disconnect: PCM C175T.
- Measure the resistance between clutch cutoff switch C2072-1, circuit CE903 (BU/OG), harness side and PCM C175T-26, circuit CE903 (BU/OG), harness side.
  
  Fig 20: Measuring Resistance Between Clutch Cutoff Switch C2072-1 And PCM C175T-26, Circuit CE903 (BU/OG)
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
  YES
  
  GO to A30.
  
  No
  
  REPAIR circuit CE903 (BU/OG). TEST the system for normal operation.
A30 CHECK CPP SWITCH FOR AN OPEN
- Measure the resistance between clutch cutoff switch C2072-2 and C2072-1, component side, fully disengage the clutch.
  
  Fig 21: Measuring Resistance Between Clutch Cutoff Switch C2072-2 And C2072-1 Component Side
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
  YES
  
  INSTALL a new PCM. REFER to ELECTRONIC ENGINE CONTROLS - 2.5L -- FUSION & MILAN (EXCEPT HYBRID) article, ELECTRONIC ENGINE CONTROLS - 3.0L (4V) -- FUSION & MILAN article or ELECTRONIC ENGINE CONTROLS - 3.5L -- FUSION & MKZ article. TEST the system for normal operation.
  
  No
  
  REPLACE the clutch cutoff switch. TEST the system for normal operation.