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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 759 (Engine Controls - Pinpoint Tests - Bi-Fuel CNG) >> Pinpoint Tests Ab: No Start - Gasoline >> Test Procedure

Test Procedure

WARNING: This page is about a different car, the 2004 Ford Pickup Heritage. However, it is still accessible from the selected car via links, so may be relevant.
  1. AB1 CHECK THE PCM FOR DTCS 
    • Key off.
    • Connect the scan tool.
    • Key on, engine off.
    • Access the PCM.
    • Carry out the PCM self-test.

    Are Any PCM DTCS Present? 

    Yes No
    REFER to the base vehicle POWERTRAIN DTC CHARTS & DESCRIPTIONS - CNG, FLEXFUEL & GASOLINE for Powertrain Diagnostic Trouble Codes. GO to  AB2.
  2. AB2 CHECK THE GASOLINE INJECTORS VPWR CIRCUIT 
    • Key off.
      NOTE: Check at least one fuel injector on each bank.
    • Disconnect two gasoline injectors.
    • Key on, engine off.
    • Measure the voltage between the right bank gasoline injector VPWR circuit, harness side and ground; and between the left bank gasoline injector VPWR circuit, harness side and ground.

    Are The Voltages Greater Than 10 Volts? 

    Yes No
    GO to  AB3. REPAIR the circuit in question.
  3. AB3 CHECK THE GASOLINE INJECTOR DRIVER CIRCUIT 
    NOTE: Check at least one fuel injector on each bank.
    • Connect a test lamp between the right bank gasoline injector VPWR circuit, harness side and the right bank gasoline injector driver circuit, harness side; and between the left bank gasoline injector VPWR circuit, harness side and the left bank gasoline injector driver circuit, harness side.
    • Crank the engine.

    Does The Test Lamp Blink Consistently And Brightly (One Blink Per Engine Revolution)? 

    Yes No
    GO to  AB4. GO to  AB10.
  4. AB4 CHECK THE FUEL PUMP PWR CIRCUIT FOR VOLTAGE 
    • Key off.
    • Disconnect the fuel pump C463.
    • Key on, engine off.
    • Access the PCM.
    • Command the fuel pump on.
    • Measure the voltage between the fuel pump C463 PWR circuit, harness side and ground.

    Is The Voltage Greater Than 10 Volts? 

    Yes No
    GO to  AB5. GO to  AB6.
  5. AB5 CHECK THE FUEL PUMP CONTROL CIRCUIT 
    • Command the fuel pump off.
    • Key off.
    • Measure the resistance between the fuel pump C463 ground circuit, harness side and ground.

    Is The Resistance Less Than 5 Ohms? 

    Yes No
    VERIFY fuel system integrity and pressure. REFER to the base vehicle INTRODUCTION - CNG, FLEX-FUEL & GASOLINE . Repair the circuit.
  6. AB6 CHECK THE GASOLINE RELAY PIN 30 FOR VOLTAGE 
    • Command the fuel pump off.
    • Key off.
    • Disconnect the gasoline relay C1218.
    • Key on, engine off.
    • Access the PCM.
    • Command the fuel pump on.
    • Measure the voltage between the gasoline relay C1218 pin 30, harness side and ground.

    IS THE VOLTAGE GREATER THAN 10 VOLTS? 

    Yes No
    GO to  AB7. REPAIR the circuit.
  7. AB7 CHECK THE GASOLINE RELAY CONTROL CIRCUIT FOR A SHORT TO GROUND 
    • Command the fuel pump off.
    • Key on, engine off.
    • Measure the resistance between the gasoline relay C1218 pin 86, harness side and ground.

    Is The Resistance Greater Than 10,000 Ohms? 

    Yes No
    GO to  AB9. GO to  AB8.
  8. AB8 CHECK THE AFCM FOR AN INTERNAL SHORT TO GROUND 
    • Key off.
    • Disconnect the AFCM C1404.
    • Measure the resistance between the gasoline relay C1218 pin 86, harness side and ground.

    Is The Resistance Greater Than 10,000 Ohms? 

    Yes No
    GO to  AB10. REPAIR the circuit.
  9. AB9 CHECK THE FUEL PUMP PWR CIRCUIT FOR AN OPEN 
    • Measure the resistance between the gasoline relay C1218 pin 87a, harness side and the fuel pump C463 PWR circuit harness side.

    IS THE RESISTANCE LESS THAN 5 OHMS? 

    Yes No
    INSTALL a new gasoline relay. REPAIR the circuit.
  10. AB10 CHECK FOR CORRECT AFCM OPERATION 
    • Disconnect the AFCM.
    • Check for:
      • corrosion
      • pushed out pins
    • Connect the AFCM connector and make sure it is seated correctly.
    • Operate the system and verify the concern is still present.

    Is The Concern Still Present? 

    Yes No
    INSTALL a new AFCM. The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector.
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