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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls - Self-Diagnostics - EEC-V - CNG, Flex-Fuel & Gasoline >> System Tests >> Test A: No-Start/Vehicle Will Not Start >> Diagnostic Aids

Diagnostic Aids

Enter this test only when all steps under QUICK TEST have been successfully completed and engine still does not start or if directed here from another test or chart. This test is only intended to diagnose.

To prevent replacement of good components, be aware the following non-EEC related areas and components may be cause of problem:

  1. 1) Check Passive Anti-Theft System

    If vehicle does not have an anti-theft system, go to next step. If vehicle has an anti-theft system, it may be activated causing the no-start condition. Verify by observing anti-theft indicator light being illuminated on instrument panel, or a DTC P1260 may be present. If anti-theft system is not activated, go to next step. If anti-theft system is activated, see appropriate ANTI-THEFT SYSTEMS article in ACCESSORIES & EQUIPMENT for diagnosis and testing.

  2. 2) Attempt To Crank Engine

    Ensure Inertia Fuel Shutoff (IFS) switch is closed (button pushed in). Attempt to start engine. If engine does not crank, check vehicle starting and charging systems. See appropriate STARTERS or GENERATORS & REGULATORS article in STARTING & CHARGING SYSTEMS. Repair as necessary and retest. If engine cranks, go to next step.

  3. 3) Check For Intermittent No Start

    Attempt to start engine. If engine now starts, fault is intermittent. Go to TEST Z, step  2). If engine does not start, go to TEST HA, step  47) (natural gas vehicles), or next step (all others).

  4. 4) Check VREF At TP Sensor

    Turn ignition switch to OFF position. Disconnect TP sensor. Turn ignition switch to ON position. Measure voltage between circuits VREF and SIG RTN at TP sensor harness connector. See Fig 1-Fig 4 . If voltage is 4-6 volts, reconnect TP sensor connector and go to next step. If voltage is not 4-6 volts, go to TEST C, step  1).
    Fig 1: Identifying TP Sensor Circuits & Connector Terminals - Contour, Cougar, Escort & Mystique 2.0L (4V)
    G99F02596Courtesy of FORD MOTOR CO.
    Fig 2: Identifying TP Sensor Circuits & Connector Terminals - Focus 2.0L (4V)
    G00013241Courtesy of FORD MOTOR CO.
    Fig 3: Identifying TP Sensor Circuits & Connector Terminals - LS
    G00013237Courtesy of FORD MOTOR CO.
    Fig 4: Identifying TP Sensor Circuits & Connector Terminals - Except Contour, Cougar, Escort & Focus 2.0L (4V), LS & Mystique 2.0L (4V)
    G99J02598Courtesy of FORD MOTOR CO.

  5. 5) Check Flash EPROM (FEPS) Circuit For Short To Power

    Measure voltage between ground and DLC terminal No. 13. See Figure. If voltage is 9 volts or less, go to step  17) (models with coil-on-plug), or next step (models with coil pack). If voltage is more than 9 volts, repair circuit for a short to power.
    6. NOTE: Ensure scan tool is connected to a reliable power source, such as the vehicle battery.

  6. 6) Check PIP Parameter Identifications (PID)
    Using scan tool, select PIP PID from PID/DATA MONITOR & RECORD menu. While observing scan tool, crank engine. On 2.0L models, if PIP PID value is switching on and off, check Crankshaft Position (CKP) sensor. Go to TEST JD, step  1). Repair as necessary. On all other models, if PIP PID value is switching on and off, check secondary ignition. Go to TEST JB, step  1). Repair as necessary. If secondary ignition and CKP sensor are okay, go to step  9) (natural gas models), or next step (all other models). On all models, if PIP PID is not switching on and off, turn ignition switch to OFF position. Go to TEST JD, step  1).

  7. 7) Check Fuel Pressure

    Turn ignition switch to OFF position. Release fuel pressure. See appropriate REMOVAL, OVERHAUL & INSTALLATION article. Install fuel pressure gauge. With scan tool connected, turn ignition switch to ON position. Using scan tool, access OUTPUT TEST MODE. See OUTPUT TEST MODE  under ADDITIONAL SYSTEM FUNCTIONS. Command fuel pump ON. If fuel pressure is as specified, go to next step. See FUEL PRESSURE SPECIFICATIONS . If fuel pressure is not as specified, go to TEST HC, step  1).

  8. 8) Check Fuel Pressure Leakdown

    Leave fuel pressure gauge installed. Connect scan tool to DLC. Turn ignition switch to ON position. Using scan tool, access OUTPUT TEST MODE  under ADDITIONAL SYSTEM FUNCTIONS. Command fuel pump ON to obtain maximum fuel pressure. Exit OUTPUT TEST MODE and turn ignition switch to OFF position. If fuel pressure remains within 5 psi (34 kPa) of maximum pressure for one minute after turning ignition switch to OFF position, go to next step. If fuel pressure does not remain within 5 psi (34 kPa), go to TEST HC, step  1).
    9. NOTE: A no-start condition can only occur if more than 50 percent of fuel injectors are without power.

  9. 9) Check VPWR Circuit At Fuel Injectors
    Disconnect at least 2 fuel injector connectors. Turn ignition switch to ON position. Measure voltage of VPWR circuit at disconnected fuel injector harness connectors. If voltage is more that 10.5 volts, go to step  15) (natural gas models), or next step (all other models). If any measurement is 10.5 volts or less, repair VPWR circuit to fuel injector.

  10. 10) Check Fuel Injectors

    Turn ignition switch to OFF position. Release fuel pressure. See appropriate REMOVAL, OVERHAUL & INSTALLATION article. Install fuel pressure gauge. Cycle ignition switch on and off several times. Disconnect Inertia Fuel Shutoff (IFS) switch connector. Monitor fuel pressure gauge while cranking engine for at least 5 seconds. If fuel pressure drops more than 5 psi (34 kPa), engine control system is not cause of no-start. Diagnose by symptom. See SYMPTOMS in TROUBLE SHOOTING - NO CODES - EEC-V (GASOLINE) article. If fuel pressure does not drop more than 5 psi (34 kPa), replace PCM. See appropriate REMOVAL, OVERHAUL & INSTALLATION article. Program PCM. See FLASH VEHICLE IDENTIFICATION BLOCK PROCEDURE .
    NOTE: A break in step numbering sequence occurs at this point. Procedure skips from step 10) to step 15). No test procedures have been omitted.

  11. 15) Check Fuel Pressure (Natural Gas Vehicles)

    Turn ignition switch to OFF position. Release fuel pressure. See REMOVAL, OVERHAUL & INSTALLATION - CNG/LPG & BI-FUEL article. With scan tool connected to DLC, access FRP PID. Turn ignition switch to ON position and record fuel pressure. If fuel pressure is 80-120 psi (552-827 kPa), go to next step. If fuel pressure is not 80-120 psi (590-800 kPa), go to TEST HB, step  1).

  12. 16) Check Injector Signal From Natural Gas (NG) Module

    Turn ignition switch to OFF position. Connect a 12-volt test light between injector signal circuit and VPWR circuit terminal at fuel injector connector. Crank engine while observing test light. If test light glows dimly while cranking engine, replace PCM and go to step  6). If test light does not glow or is on continuously, go to TEST HA, step  47).

  13. 17) Check PCM Driver To Coils

    Turn ignition switch to OFF position. Connect 12-volt test light between B+ and coil driver circuit. Crank engine while observing test light. Repeat procedure for each coil driver. Test light should blink brightly (once for each engine revolution). If test light blinks as specified, go to step  7). If test light does not blink as specified, go to TEST JD, step  1).
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