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Home >> Ford >> 2000 >> Taurus LX, 3.0 2, AX4N >> Repair and Diagnosis >> External Pages >> Different car >> Section 862 (Starting System - F-150 & Mark LT) >> Diagnostic Tests >> Starting System >> Pinpoint Tests >> Pinpoint Test C: The Engine Does Not Crank and the Relay Does Not Click (Late Build Vehicles) >> Pinpoint Test C: The Engine Does Not Crank And The Relay Does Not Click (Late Build Vehicles)

Pinpoint Test C: The Engine Does Not Crank And The Relay Does Not Click (Late Build Vehicles)

WARNING: This page is about a different car, the 2007 Lincoln Mark LT and 2007 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.
  1. C1 CHECK THE BATTERY 
    1. YES  : Go to  C2.
    2. NO  : CHARGE or INSTALL a new battery as necessary. REFER to BATTERY, MOUNTING AND CABLES article. TEST the system for normal operation.
  2. C2 CHECK FOR PATS DTCs 
      NOTE: PATS diagnostic trouble codes (DTCs) are the only DTCs of concern in this step. Only repair retrieved non-PATS DTCs if a customer concern is reported.
    • Check for PATS DTCs.
    • Were any PATS DTCs retrieved? 
    1. YES  : REFER to ANTI-THEFT article to diagnose the PATS DTCs.
    2. NO  : Go to  C3.
  3. C3 CHECK CIRCUIT 1522 (DG) FOR VOLTAGE AT THE OTIS DIODE 
    • Disconnect: OTIS Diode
    • Key in START position.
    • For vehicles without daytime running lamps, measure the voltage between auxiliary relay box 1 OTIS diode cell, circuit 1522 (DG) and ground with the ignition switch in the START position.
      Fig 1: Checking Circuit 1522 (DG) For Voltage At Otis Diode (Without Daytime Running Lamps)
      GF0002875Courtesy of FORD MOTOR CO.
    • For vehicles with daytime running lamps, measure the voltage between auxiliary relay box 1 OTIS diode cell, circuit 1522 (DG) and ground with the ignition switch in the START position.
      Fig 2: Checking Circuit 1522 (DG) For Voltage At Otis Diode (With Daytime Running Lamps)
      GF0002876Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    1. YES  : Go to  C6.
    2. NO  : Go to  C4.
  4. C4 CHECK CIRCUIT 1050 (LG/VT) FOR VOLTAGE 
    • Disconnect: Ignition Switch C250
    • Measure the voltage between ignition switch C250-4, circuit 1050 (LG/VT) and ground.
      Fig 3: Checking Circuit 1050 (LG/VT) For Voltage
      GF0002869Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    1. YES  : Go to  C5.
    2. NO  : REPAIR circuit 1050 (LG/VT). TEST the system for normal operation.
  5. C5 CHECK THE IGNITION SWITCH 
    • Carry out the Ignition Switch Component Test. Refer to COMPONENT TESTING.
    • Did the ignition switch pass the component test? 
    1. YES  : REPAIR circuit 1522 (DG) or 32 (RD/LB) for an open. TEST the system for normal operation.
    2. NO  : INSTALL a new ignition switch. REFER to STEERING COLUMN SWITCHES article. TEST the system for normal operation.
  6. C6 CHECK CIRCUIT 1522 (DG) FOR AN OPEN 
    • Key in OFF position.
    • Disconnect: PCM C175B
    • For vehicles without daytime running lamps, measure the resistance between auxiliary relay box 1 OTIS diode cell, circuit 1522 (DG) and PCM C175B-7, circuit 1522 (DG), harness side.
      Fig 4: Checking Circuit 1522 (DG) For Open (Without Daytime Running Lamps)
      GF0002877Courtesy of FORD MOTOR CO.
    • For vehicles with daytime running lamps, measure the resistance between auxiliary relay box 1 OTIS diode cell, circuit 1522 (DG) and PCM C175B-7, circuit 1522 (DG), harness side.
      Fig 5: Checking Circuit 1522 (DG) For Open (With Daytime Running Lamps)
      GF0002878Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  C7.
    2. NO  : REPAIR the circuit 1522 (DG). TEST the system for normal operation.
  7. C7 CHECK ONE-TOUCH INTEGRATED START (OTIS) DIODE 
    • Carry out an OTIS Diode Test.
    • Is the OTIS diode open or shorted? 
    1. YES  : INSTALL a new OTIS diode. TEST the system for normal operation.
    2. NO  : Go to  C8.
  8. C8 CHECK CIRCUIT 1093 (TN/RD) FOR VOLTAGE 
    • Disconnect: Starter Motor Relay
    • Key in START position.
    • Measure the voltage between CJB starter motor relay pin 86, circuit 1093 (TN/RD) and ground while holding the key in the START position.
      Fig 6: Checking Circuit 1093 (TN/RD) For Voltage
      GF0002864Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    1. YES  : Go to  C12.
    2. NO  : Go to  C9.
  9. C9 CHECK CIRCUIT 325 (DB/OG) FOR VOLTAGE AT THE DIGITAL TR SENSOR 
    • Key in OFF position.
    • Disconnect: Digital TR Sensor C167
    • Key in START position.
    • Measure the voltage between digital TR sensor C167-10, circuit 325 (DB/OG) and ground while holding the key in the START position.
      Fig 7: Checking Circuit 325 (DB/OG) For Voltage At Digital TR Sensor
      GF0002865Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    1. YES  : Go to  C10.
    2. NO  : REPAIR circuit 325 (DB/OG). TEST the system for normal operation.
  10. C10 CHECK CIRCUIT 1093 (TN/RD) FOR AN OPEN 
    • Measure the resistance between digital TR sensor C167-12, circuit 1093 (TN/RD) and CJB starter motor relay pin 86, circuit 1093 (TN/RD).
      Fig 8: Checking Circuit 1093 (TN/RD) For Open
      GF0002866Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  C11.
    2. NO  : REPAIR circuit 1093 (TN/RD). TEST the system for normal operation.
  11. C11 CHECK THE DIGITAL TR SENSOR ADJUSTMENT 
    1. YES  : INSTALL a new digital TR sensor. TEST the system for normal operation.
    2. NO  : ADJUST the digital TR sensor as necessary. TEST the system for normal operation.
  12. C12 CHECK THE STARTER MOTOR RELAY GROUND CIRCUIT FOR AN OPEN 
    • Key in START position.
    • Measure the voltage between CJB starter motor relay pin 85, circuit 1785 (LG/VT) and pin 86, circuit 1093 (TN/RD).
      Fig 9: Checking Starter Motor Relay Ground Circuit For Open
      GF0002870Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    1. YES  : INSTALL a new starter motor relay. TEST the system for normal operation.
    2. NO  : Go to  C13.
  13. C13 CHECK PCM CIRCUIT 325 (DB/OG) FOR AN OPEN 
    • Key in OFF position.
    • Disconnect: PCM C175B
    • Measure the resistance between PCM C175B-43, circuit 325 (DB/OG), harness side and CJB starter relay pin 86, circuit 1093 (TN/RD).
      Fig 10: Checking PCM Circuit 325 (DB/OG) For Open
      GF0002879Courtesy of FORD MOTOR CO.
    • Is the resistance reading 5 ohms or less? 
    1. YES  : Go to  C14.
    2. NO  : REPAIR circuit 325 (DB/OG). TEST the system for normal operation.
  14. C14 CHECK CIRCUIT 1785 (LG/VT) FOR AN OPEN 
    • Measure the resistance between the CJB starter motor relay connector pin 85, circuit 1785 (LG/VT) and PCM C175B-34, circuit 1785 (LG/VT).
      Fig 11: Checking CJB Starter Motor Circuit 1785 For An Open
      GF0002880Courtesy of FORD MOTOR CO.
    • Is the resistance reading 5 ohms or less? 
    1. YES  : DIAGNOSE the PCM. REFER to the INTRODUCTION - GASOLINE ENGINES article.
    2. NO  : REPAIR circuit 1785 (LG/VT) for an open. TEST the system for normal operation.
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