Power transistor (built into the distributor) — check

If the waveform from the transistor measured by the oscilloscope is abnormal, use an analog tester to check the resistance between the corresponding transistor pins by reversing the probes.

Checked contacts and resistance (at room temperature):

• Contacts 8 (+), 7 (-): not O or infinity Σ
• Contacts 8 (-), 7 (+): not O or infinity Σ
• Contacts 5 (+), 8 (-): not O or infinity Σ

• Contacts 5 (-), 8 (+): infinity Σ
• Contacts 7 (+), 5 (-): infinity Σ
• Contacts 7 (-), 5 (+): O or not infinity Σ

When measured with a digital tester, the resistance values will differ from those indicated.

Check if power is supplied from the distributor (rotor and distributor cap).

If resistance values differ from norm, replace the distributor.