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Home >> Mazda >> 1999 >> B2500 SX, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 4 (Engine Controls - Self-Diagnostics - EEC-V - 6.8L (99S E Series & 99S F350 To F550)) >> System Tests >> Test JB: Secondary Ignition

Test JB: Secondary Ignition

WARNING: This page does not describe the selected car, but rather 26 other vehicles, including the 1999 Mercury Tracer, 1999 Mercury Sable, 1999 Mercury Mystique, 1999 Mercury Mountaineer, and 1999 Mercury Grand Marquis. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: After each service or repair procedure has been completed, reconnect all components. Clear DTCs and repeat QUICK TEST  procedures to ensure all EEC-V systems are working properly and DTCs are no longer present.

  1. 1) Preliminarily Test

    Ensure battery is fully charged and all accessories are off. Check all wiring harnesses and connectors for damage, and burned or overheated insulation. Repair as necessary and perform MISFIRE MONITOR REPAIR VERIFICATION DRIVE CYCLE. See DRIVE CYCLES  under ADDITIONAL SYSTEM FUNCTIONS. If no problems are found, proceed as follows:
    • On models equipped with coil on plug system, go to step  15).
    • On models equipped with coil pack system, go to next step (if using engine analyzer) or go to step  20) (if not using engine analyzer).

  2. 2) Connect Engine Analyzer

    DTC P0350 indicates an ignition coil primary circuit malfunction. Install Rotunda Engine Analyzer (010-00869) engine analyzer. Go to next step.

  3. 3) Check For Ignition Pattern

    Crank engine and observe scope pattern. If scope pattern is flat (no spark on all cylinders), repair IGN START/RUN circuit. Check all related fuses and fuse links. After repair is complete, perform MISFIRE MONITOR REPAIR VERIFICATION DRIVE CYCLE. See DRIVE CYCLES  under ADDITIONAL SYSTEM FUNCTIONS.
    4. NOTE: Spark plugs are fired up to 4 strikes per firing. Multi-Strike operating mode is dependent on PCM calibration and is operational only with engine speed at less than 2000 RPM. With engine speed at more than 2000 RPM, spark plugs are fired once.

  4. 4) Check For Normal Ignition Pattern
    Start engine. Observe scope pattern and check average spark output voltage and variation of pattern. If spark output voltage is more than 20,000 volts with output variation more than 8000 volts, go to next step. If average spark output firing voltage is 20,000 volts or less with output variation 8000 volts or less, ignition system is functioning properly. If directed here from TROUBLE SHOOTING - NO CODES - EEC-V article, return to symptom test that directed you here. If directed here from TEST HD, step 5), return to  TEST HD, step 6). If directed here from TEST A, step 6)  , return to  TEST A, step 7). On all others, go to TEST Z  and check for intermittents.

  5. 5) Check For 2 Missing Spark Patterns On Same Coil

    Observe scope pattern. If spark is not missing from 2-cylinders on same coil, go to next step. If spark is missing from 2-cylinders on same coil, check spark plugs for wear. Check resistance of spark plugs. If resistance is not 2000-20,000 ohms, replace spark plug. Check spark plug wires for 7000 ohms per foot maximum resistance. Repair as necessary and retest. If plug wires and plugs are okay, go to TEST JE .

  6. 6) Check For One Missing Spark Pattern

    Observe scope pattern. If spark is not missing from one cylinder, go to next step. If spark is missing from one cylinder, check spark plug for wear. Check resistance of spark plug. If resistance is not 2000-20,000 ohms, replace spark plug. Check spark plug wire for 7000 ohms per foot maximum resistance. Repair as necessary. Perform MISFIRE MONITOR REPAIR VERIFICATION DRIVE CYCLE. See DRIVE CYCLES  under ADDITIONAL SYSTEM FUNCTIONS.

  7. 7) Check For High Spark Voltage

    Observe scope pattern and check average spark output voltage and variation of pattern. If spark output voltage is 20,000 volts or less with output variation 8000 volts or less, go to next step. If average spark output firing voltage is more than 20,000 volts with output variation 8000 volts or less, check spark plugs for wear. Check resistance of spark plugs. If resistance is not 2000-20,000 ohms, replace spark plug. Check spark plug wires for 7000 ohms per foot maximum resistance. Repair as necessary. Perform MISFIRE MONITOR REPAIR VERIFICATION DRIVE CYCLE. See DRIVE CYCLES  under ADDITIONAL SYSTEM.

  8. 8) Check For Low Spark Voltage

    Observe scope pattern and check average spark output voltage and variation of pattern. If spark output voltage is not consistently low in one or more cylinders, go to next step. If spark output voltage is consistently low in one or more cylinders, check spark plug(s) for wear. Check resistance of spark plug(s). If resistance is not 2000-20,000 ohms, replace spark plug. Check spark plug wire(s) for 7000 ohms per foot maximum resistance. Repair as necessary. Perform MISFIRE MONITOR REPAIR VERIFICATION DRIVE CYCLE. See DRIVE CYCLES  under ADDITIONAL SYSTEM FUNCTIONS.

  9. 9) Check For Voltage Variation Between Cylinders

    Observe scope pattern. If spark output voltage variation is more than 8000 volts, check spark plugs for wear. Check resistance of spark plugs. If resistance is not 2000-20,000 ohms, replace spark plug. Check spark plug wires for 7000 ohms per foot maximum resistance. Repair as necessary. Perform MISFIRE MONITOR REPAIR VERIFICATION DRIVE CYCLE. See DRIVE CYCLES  under ADDITIONAL SYSTEM FUNCTIONS. If spark output voltage variation is less than 8000 volts, go to next step.
    NOTE: A break in step numbering sequence occurs at this point. Procedure skips from step 9) to step 15). No test procedures have been omitted.

  10. 15) DTC P0301-P0310: Misfire On Cylinders No. 1-10

    If DTC P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308, P0309 or P0310 is present, go to next step. If none of the specified DTCs are not present, go to step  17).

  11. 16) Check For Spark At Cylinders Indicated By DTC

    Disconnect Inertia Fuel Shutoff (IFS) switch. Disconnect ignition coil(s) from spark plug. Install Spark Tester (303-D037) to coil. Crank engine. If Bluish-White spark is present, go to step  18). If Bluish-White spark is not present, check resistance of spark plug(s). If resistance is not 2000-20,000 ohms, replace spark plug. Go to TEST JF .

  12. 17) Check For Spark At ALL Spark Plugs

    Disconnect Inertia Fuel Shutoff (IFS) switch. Using Spark Tester (303-D037), check for spark at all coils while cranking engine. If Bluish-White spark is present at all coils, go to next step. If Bluish-White spark is not present at all coils, go to TEST JF .

  13. 18) Check Spark Plugs

    Remove and inspect spark plugs for damage, wear, carbon deposits and proper plug gap. Replace plugs as necessary. Perform MISFIRE MONITOR REPAIR VERIFICATION DRIVE CYCLE. See DRIVE CYCLES  under ADDITIONAL SYSTEM FUNCTIONS. If spark plugs are okay, go to next step.

  14. 19) Check Spark Plug Resistance

    Check resistance of spark plugs. If resistance is not 2000-20,000 ohms, replace spark plug. Perform MISFIRE MONITOR REPAIR VERIFICATION DRIVE CYCLE. See DRIVE CYCLES  under ADDITIONAL SYSTEM FUNCTIONS. If spark plugs are okay, proceed as follows. If directed here from TROUBLE SHOOTING - NO CODES - EEC-V article, return to symptom test that directed you here. If directed here from TEST HD, step 5)  , return to  TEST HD, step 6). If directed here from TEST A, step 6)  , return to  TEST A, step 7). On all others, go to TEST Z  and check for intermittents.

  15. 20) DTC P0301-P0310: Misfire On Cylinders No. 1-10

    If DTC P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308, P0309 or P0310 is present, go to next step. If any of the specified DTCs are not present, go to step  22).

  16. 21) Check For Spark A Cylinders Indicated By DTCs

    Disconnect Inertia Fuel Shutoff (IFS) switch. Disconnect spark plug wire from spark plug. Install Spark Tester (303-D037) to spark plug wire. Crank engine. If Bluish-White spark is present, go to step  23). If Bluish-White spark is not present, check spark plug wires for 7000 ohms per foot maximum resistance. Repair as necessary. Perform MISFIRE MONITOR REPAIR VERIFICATION DRIVE CYCLE. See DRIVE CYCLES  under ADDITIONAL SYSTEM FUNCTIONS. If spark plug wires are okay, go to TEST JE .

  17. 22) Check For Spark At ALL Spark Plugs

    Disconnect Inertia Fuel Shutoff (IFS) switch. Disconnect spark plug wires from spark plugs. Using Spark Tester (303-D037), check for spark at each plug wire while cranking engine. If Bluish-White spark is present at all plugs, go to next step. If Bluish-White spark is not present at all plugs, check spark plug wires for 7000 ohms per foot maximum resistance. Repair as necessary. Perform MISFIRE MONITOR REPAIR VERIFICATION DRIVE CYCLE. See DRIVE CYCLES  under ADDITIONAL SYSTEM FUNCTIONS. If spark plug wires are okay, go to TEST JE .

  18. 23) Check Spark Plugs

    Remove and inspect spark plugs for damage, wear, carbon deposits and proper plug gap. Replace plugs as necessary. Perform MISFIRE MONITOR REPAIR VERIFICATION DRIVE CYCLE. See DRIVE CYCLES  under ADDITIONAL SYSTEM FUNCTIONS. If spark plugs are okay, go to next step.

  19. 24) Check Spark Plug Resistance

    Check resistance of spark plugs. If resistance is not 2000-20,000 ohms, replace spark plug. Perform MISFIRE MONITOR REPAIR VERIFICATION DRIVE CYCLE. See DRIVE CYCLES  under ADDITIONAL SYSTEM FUNCTIONS. If spark plugs are okay, proceed as follows. If directed here from TROUBLE SHOOTING - NO CODES - EEC-V article, return to symptom test that directed you here. If directed here from TEST HD, step 5)  , return to  TEST HD, step 6). If directed here from TEST A, step 6)  , return to  TEST A, step 7). On all others, go to TEST Z  and check for intermittents.
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