Pinpoint Test A: The Engine Does Not Crank

WARNING: This page is about a different car, the 2006 Ford Pickup, 2006 Ford F550 Super Duty, 2006 Ford F450 Super Duty, and 2006 Ford Cab & Chassis. 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 AND CABLES .
- Is the battery OK?
Yes : Go to A2.

No : CHARGE or INSTALL a new battery as necessary. REFER to BATTERY, MOUNTING AND CABLES . TEST the system for normal operation.
A2 CHECK THE BATTERY GROUND CABLE
- Measure the voltage between the positive battery post and the battery ground cable connection on the engine.
  
  Fig 1: Checking Battery Ground Cable
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
Yes : Go to A3.

No : INSTALL a new battery ground cable. REFER to BATTERY, MOUNTING AND CABLES . TEST the system for normal operation.
A3 CHECK THE STARTER MOTOR GROUND
- Measure the voltage between the battery positive post and the starter motor case.
  
  Fig 2: Checking Starter Motor Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
Yes : Go to A4.

No : CLEAN the starter motor mounting flange and make sure the starter motor is correctly mounted. TEST the system for normal operation.
A4 CHECK THE POWER SUPPLY TO THE STARTER MOTOR
- Measure the voltage between starter motor B-pin and ground.
  
  Fig 3: Checking Power Supply To Starter Motor
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
Yes : Go to A5.

No : INSTALL a new positive battery cable. REFER to BATTERY, MOUNTING AND CABLES . TEST the system for normal operation.
A5 CHECK THE STARTER MOTOR B-PIN
- Connect a fused (30A) jumper wire to the B-terminal of the starter motor. Momentarily connect the other lead of the jumper wire to the starter motor S-terminal.
  
  Fig 4: Checking Starter Motor Solenoid Operation
  Courtesy of FORD MOTOR CO.
- Did the starter motor engage and the engine crank?
Yes : Go to A6.

No : INSTALL a new starter motor. REFER to STARTER MOTOR . TEST the system for normal operation.
A6 CHECK THE START INPUT TO THE STARTER MOTOR
- Disconnect: Starter Motor C197a.
- Key in START position.
- Measure the voltage between starter motor 197a, circuit 113 (YE/LB), harness side and ground, while placing the ignition switch in the START position.
  
  Fig 5: Checking Start Input To Starter Motor
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
Yes : CLEAN the starter motor S-terminal and connector. CHECK the wiring and the starter motor for a loose or intermittent connection. TEST the system for normal operation.

No : Go to A7.
A7 CHECK THE START INPUT TO THE STARTER RELAY
- Disconnect: Starter Relay.
- Make sure the vehicle is in PARK or NEUTRAL.
- Key in START position.
- Measure the voltage between starter relay C2163-85, circuit 33 (WH/PK), and ground.
  
  Fig 6: Checking Start Input To Starter Relay
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
Yes : Go to A8.

No : Go to A12.
A8 CHECK THE BATTERY SUPPLY TO THE STARTER RELAY
- Measure the voltage between starter relay C2163-30, and ground.
  
  Fig 7: Checking Battery Supply To Starter Relay
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
Yes : Go to A9.

No : REPAIR the circuit. TEST the system for normal operation.
A9 CHECK THE GROUND SIGNAL TO THE STARTER RELAY
- Key in START position.
- Measure the voltage between starter relay C2163-86, circuit 329 (PK) and C2163-85, circuit 33 (WH/PK), while placing the ignition switch in the START position.
  
  Fig 8: Checking Ground Signal To Starter Relay
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
Yes : Go to A11.

No : Go to A10.
A10 CHECK CIRCUIT 329 (PK) FOR AN OPEN
- Disconnect: PCM C175b.
- Measure the resistance between starter relay C2163-86, circuit 329 (PK), harness side and PCM C175b-2, circuit 329 (PK), harness side.
  
  Fig 9: Checking Circuit 329 (PK) For Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes : DIAGNOSE the PCM. REFER to the INTRODUCTION - GASOLINE article.

No : REPAIR the circuit. TEST the system for normal operation.
A11 CHECK CIRCUIT 113 (YE/LB) FOR AN OPEN
- Disconnect: Starter Motor C197a.
- Measure the resistance between starter relay C2163-87, circuit 113 (YE/LB), harness side and starter motor C197a, circuit 113 (YE/LB), harness side.
  
  Fig 10: Checking Circuit 113 (YE/LB) For Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes : INSTALL a new starter relay. TEST the system for normal operation.

No : REPAIR the circuit. TEST the system for normal operation.
A12 CHECK THE START INPUT TO CJB FUSE 31 (15A)
- Disconnect: CJB Fuse 31 (15A).
- Key in START position.
- Measure the voltage between CJB fuse 31 (15A) input cavity and ground, while placing the ignition switch in the START position.
- Is the voltage greater than 10 volts?
Yes : Go to A13.

No : Go to A14.
A13 CHECK CIRCUIT 33 (WH/PK) FOR AN OPEN
- Measure the resistance between CJB C270h-8, circuit 33 (WH/PK), harness side and starter relay C2163-85, circuit 33 (WH/PK), harness side.
  
  Fig 11: Checking Circuit 33 (WH/PK) For Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes : DIAGNOSE the PCM. REFER to the INTRODUCTION - GASOLINE article.

No : REPAIR the circuit. TEST the system for normal operation.
A14 CHECK THE IGNITION SWITCH
- Carry out the ignition switch component test.
- Did the ignition switch pass the component test?
Yes : REPAIR circuit 1522 (DG). TEST the system for normal operation.

No : INSTALL a new ignition switch. REFER to STEERING COLUMN SWITCHES . TEST the system for normal operation.