Mazda MX-5 NA silhouetteMX-5 NA

IGNITION SYSTEM — IGNITER / HIGH-TENSION LEAD

G-22prose procedure
Continued from G-21

IGNITER

Inspection

Igniter inspection

  1. 1
    Disconnect the igniter connector.
    Do not ground the power connector terminal (Blue: 1-pin), the wiper 20A fuse will be burned.
  2. 2
    Connect the SST between the igniter and igniter connector as shown.
    Engine bay photo showing the 49 N018 001 Adapter harness and 49 F018 002 Igniter checker SSTs connected between the igniter and the igniter connector.
    05U0GX-052
  3. 3
    Connect the SST to the power connector (Blue: 1-pin).
  4. 4
    Connect a voltmeter between the SST (brown wire) and a ground.
    Engine bay photo showing 49 N018 001 adapter harness with voltmeter probes connected between the GRAY and BROWN wires of the SST to verify approx. 12V.
    05U0GX-053
  5. 5
    Turn the ignition switch ON.
  6. 6
    Verify that there is approx. 12V at the terminal. If not as specified, check related wiring.
  7. 7
    Push the SW2 switch on the SST while observing the ohmmeter.
    Do not activate the SW2 switch for more than 1 sec.
    Bench illustration of the SW2 PUSH switch on the SST connected through an ohmmeter/voltmeter to a BROWN OR GRAY lead and ground, showing the voltmeter reading approx. 8V when SW2 is pushed.
    05U0GX-054
  8. 8
    Verify that the voltmeter indicates approx. 8V.
  9. 9
    If not as specified, replace the igniter.
  10. 10
    Disconnect the voltmeter from the brown wire and connect it to the SST gray wire.
  11. 11
    Repeat Steps 5 through 9.

HIGH-TENSION LEAD

Inspection

Use an ohmmeter to measure the resistance of each lead.
Resistance
16kΩ per 1 m (3.28 ft)
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