Replace the igniter if it does not perform as specified.ġ. Flip SW2 "ON" and "OFF" and verify that strong blue sparks are discharged from the high tension lead.ĬAUTION: Do not hold SW2 "ON" for longer than one second.Ĩ. Disconnect high tension coil lead from distributor cap and hold 0.20 - 0.39 in (5 - 10 mm) from a ground.ħ. Connect igniter checker power leads to battery.Ħ. Attach 4-pin connector of igniter checker (SST #49 F018 002) to adapter harness.Ĥ. Connect adapter (SST #49 N018 011) between igniter and wiring harness.ģ. NOTE: This test requires Mazda Special Service Tools (SST) or aftermarket equivalents.Ģ. Vehicle Powertrain Management Relays and Modules - Powertrain Management Relays and Modules - Ignition System Ignition Control Module Testing and Inspection Component Tests and General Diagnostics Have you confirmed that there is no spark to the plugs? Now, I have a feeling the problem is related to the crank angle sensor. Normally, they break it down by component. That is what is provided under distributor testing. Refer to Computers and Control Systems for diagnostic information. A problem with the "G" signal will set malfunction code 03. When problems with these signals are detected, malfunction codes are set and can be retrieved from the on-board diagnostic system.Ī faulty "Ne" signal will set malfunction code 02. In the electronic engine control system utilized on this vehicle, two signals generated by the distributor crank angle sensor are used by the ECU in its calculations for various outputs. Vehicle Powertrain Management Ignition System Distributor Testing and Inspection Component Tests and General Diagnostics Let me know if this is what you wanted or if you have other questions.Īs far as a distributor test, it is very general and not much help. Except for the initial setting, ignition timing is under ECU control. To calculate ignition timing, the ECU uses this input together with several others related to vehicle operating conditions. Signals generated are interpreted by the ECU to determine crank angle (#1 cylinder TDC) and engine rpm. As the disc rotates past the pick-up, the slots (one for each cylinder) alternately pass and block photo-diode light transmission. A rotor on the driven shaft acts as a rotary contact, directing ignition coil voltage to each spark plug terminal as it turns inside the distributor cap.ĭistributor utilizes a photo-diode type crank angle sensor consisting of a slotted disc that turns with the distributor shaft and a stationary pick-up assembly. Here is the manual's description of operation.ĭirects high voltage ignition coil output to spark plugs in proper sequence (firing order). If you look at pic 1, it shows an exploded view of the distributor on this vehicle. If you are experiencing a specific condition, I would be better able to help you identify what to check and how to check it if you let me know the present condition. Can you explain what is happening so I can better guide you? The motor turns a shaft which in turn moves a distributor rotor to distribute power to one cylinder at a time. As far as a distributor, they are basically straight forward.
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