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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 2770 (Engine Controls - Pinpoint Test JB: Secondary Ignition (Cop) Through Pinpoint Test KD: Electric Exhaust Gas RECIRCULATION (EEGR) System - CNG, Flex-Fuel & Gasoline) >> Pinpoint Test JC: Secondary Ignition (Coil Pack) >> Test Procedure

Test Procedure

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  1. JC1 VISUAL INSPECTION OF THE IGNITION SYSTEM 
    NOTE: On certain applications with Electronic Throttle Control (ETC), erroneous ignition and ETC related DTCs may be set due to salt water intrusion into the CKP harness connector. These DTCs are: P0320, P0351, P0356 and P2106. Thoroughly clean the connector, pack with di-electric grease and retest. If the problem returns, REPLACE the CKP sensor.
    • Visually inspect the engine compartment to make sure all coils and spark plug wires are properly and securely connected.
    • Examine all wiring harnesses and connectors for damaged, burned or overheated insulation and loose or broken conditions.
    • Ensure vehicle battery is in good condition and all accessories are turned off.

    Is a problem indicated? 

    Yes No
    Repair as necessary.
    CARRY OUT the misfire monitor repair verification drive cycle. REFER to DRIVE CYCLES .    		 For Coil pack using engine analyzer  .
    GO to  JC2.

    For Coil pack not using engine analyzer  .


    GO to  JC11.
  2. JC2 CONNECT THE ENGINE ANALYZER 
    • Obtain an engine analyzer to diagnose concerns in the secondary side of the ignition system.

    Is the engine analyzer connected? 

    Yes No
    GO to  JC3. Repeat Step JC2
  3. JC3 CHECK FOR IGNITION PATTERN 
    • Observe the pattern on the scope while cranking the engine.
    Fig 1: Identifying Flat Pattern - No Spark
    G03626721Courtesy of FORD MOTOR CO.

    Is the pattern flat, which indicates no spark on all cylinders? 

    Yes No
    IGN/START/RUN circuit concern.
    IGN START/RUN circuit fault. KEY OFF. CHECK the condition of the related fuses/fuse links. If OK, REPAIR the open circuit. If the fuse/fuse link is
    damaged, CHECK the IGN START/RUN circuit for short to ground. REPAIR as necessary. CARRY OUT the Misfire Monitor Repair Verification Drive Cycle. REFER to DIAGNOSTIC METHODS - CNG, FLEX-FUEL & GASOLINE , Drive Cycle.    		 GO to  JC4.
  4. JC4 CHECK FOR NORMAL IGNITION PATTERN 
    NOTE: Spark plugs may be fired more than once per combustion event. Multi-strike operating mode is RPM dependent.
    • Key on, start the engine. If no start, crank the engine.
    Fig 2: Identifying Even & Average Spark Plug Firing Pattern
    G03626722Courtesy of FORD MOTOR CO.

    Are the patterns even and is the average value of spark plug firing voltage between 9 kV and 15 kV (higher during engine crank/no start)? 

    Yes No
    GO to PINPOINT TEST Z step 1 . GO to  JC5.
  5. JC5 IGNITION PATTERN EVALUATION 

    Is the ignition pattern normal? 

    Yes No
    GO to  JC6. GO to  JC7.
  6. JC6 TEST DIRECTION 

    Were you directed to this pinpoint test from A9? 

    Yes No
    GO to PINPOINT TEST A step 10 . GO to  JC7.
  7. JC7 CHECK FOR MISSING SPARK PATTERNS 
    Fig 3: Identifying Inconsistent/Missing Spark Plug Firing Pattern
    G03626723Courtesy of FORD MOTOR CO.

    Is the spark pattern inconsistent? 

    Yes No
    INSPECT the spark plug wires and plugs. MEASURE the resistance of the spark plug wires. REPLACE if the resistance is greater than 7,000 ohms per 30.5 cm (1 foot).
    GO to  JE1.    		 GO to  JC8.
  8. JC8 CHECK FOR A HIGH SPARK PLUG FIRING VOLTAGE 
    Fig 4: Identifying High Spark Plug Firing Voltage Pattern
    G03626724Courtesy of FORD MOTOR CO.

    Is the average value of the spark plug firing voltage greater than 15 Kv? 

    Yes No
    INSPECT the spark plug wires and plugs. MEASURE the resistance of the spark plug wires. REPLACE if the resistance is greater than 7,000 ohms per 30.5 cm (1 foot). GO to  JC9.
  9. JC9 CHECK FOR LOW SPARK PLUG FIRING VOLTAGE 
    • CHECK the spark plug firing voltage average pattern.
    Fig 5: Identifying Low Spark Plug Firing Voltage Pattern
    G03626725Courtesy of FORD MOTOR CO.

    Is there consistently low spark plug firing voltage or sloping sparkline on one or more cylinders? 

    Yes No
    INSPECT the spark plug wires and plugs. MEASURE the resistance of the spark plug wires. REPLACE if the resistance is greater than 7,000 ohms per 30.5 cm (1 foot).
    MEASURE the resistance of the spark plugs. REPLACE the spark plugs if resistance is lower than 2,000 or higher than 20,000 ohms.
    CARRY OUT the misfire monitor repair verification drive cycle. REFER to DRIVE CYCLES .    		 GO to  JC10.
  10. JC10 CHECK FOR EVENNESS BETWEEN CYLINDERS 
    • CHECK the spark plug firing voltage average pattern.
    Fig 6: Identifying Unevenness Between Spark Plug Firing Patterns
    G03626726Courtesy of FORD MOTOR CO.

    Is the evenness of spark plug firing voltage greater than 6 kV? 

    Yes No
    INSPECT the spark plug wires and plugs. MEASURE the resistance of the spark plug wires. REPLACE if the resistance is greater than 7,000 ohms per 30.5 cm (1 foot).
    CHECK for damaged spark plugs or narrow spark plug gaps.
    MEASURE the resistance of the spark plugs. REPLACE the spark plugs if resistance is lower than 2,000 or higher than 20,000 ohms.
    CARRY OUT the misfire monitor repair verification drive cycle. REFER to DRIVE CYCLES .    		 GO to Z1 .
  11. JC11 DTC P0301 THROUGH P0306: MISFIRE ON CYLINDERS 1 THROUGH 6 

    Are any of the above listed DTCs present? 

    Yes No
    GO to  JC12. GO to  JC13.
  12. JC12 CHECK FOR SPARK AT THE CYLINDER(S) INDICATED BY THE DTC(S) 
    • Disable the inertia switch.
    • Disconnect the spark plug wire(s) from the spark plug(s).
    • Connect air gap spark tester 303-D037 (D81P-6666-A) or equivalent to a spark plug wire.
    • CHECK for spark while cranking the engine.

    Is the bluish-white spark present? 

    Yes No
    KEY OFF.
    GO to  JC14.    		 KEY OFF.
    INSPECT the spark plug wires and plugs. MEASURE the resistance of the spark plug wires. REPLACE if the resistance is greater than 7,000 ohms per 30.5 cm (1 foot).
    CARRY OUT the misfire monitor repair verification drive cycle. REFER to DRIVE CYCLES .
    If the spark plug wires are OK,
    GO to  JE1.
  13. JC13 CHECK FOR SPARK AT ALL CYLINDERS 
    • Disable the inertia switch.
    • Disconnect the spark plug wire(s) from the spark plug(s).
    • Connect air gap spark tester 303-D037 (D81P-6666-A) or equivalent to a spark plug wire.
    • CHECK for spark while cranking the engine.

      Is the bluish-white spark present? 

      Yes No
      KEY OFF.
      GO to  JC14.      		 KEY OFF.
      INSPECT the spark plug wires and plugs. MEASURE the resistance of the spark plug wires. REPLACE if the resistance is greater than 7,000 ohms per 30.5 cm (1 foot).
      CARRY OUT the misfire monitor repair verification drive cycle. REFER to DRIVE CYCLES .
      If the spark plug wires are OK,
      GO to  JE1.
  14. JC14 CHECK THE SPARK PLUGS 
    • CHECK for damaged spark plugs or narrow spark plug gaps.

      Are the plugs OK? 

      Yes No
      GO to  JC15. REPAIR the plug(s). ADJUST the gap or REPLACE as necessary.
      CARRY OUT the misfire monitor repair verification drive cycle. REFER to DRIVE CYCLES .
  15. JC15 CHECK SPARK PLUG RESISTANCE 
    • Measure the spark plug resistance.

    Is the resistance between 2,000 and 20,000 ohms? 

    Yes No
    GO to PINPOINT TEST Z step 1 . REPLACE the spark plugs.
    CARRY OUT the misfire monitor repair verification drive cycle. REFER to DRIVE CYCLES .
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