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Home >> Mazda >> 1987 >> 626 Base >> Repair and Diagnosis >> Engine Performance >> System >> Fuel INJ - MPFI System >> Diagnosis >> Diagnostic Procedure >> Code 1 (Ignition Pulse)
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Code 1 (Ignition Pulse)

  1. Ensure that negative terminal of ignition coil is properly connected. With ignition coil terminal properly connected, check that "1M" (323) terminal voltage at ECU is between 12-13 volts.
  2. If voltage is correct, replace faulty ECU. If voltage is incorrect, check for open or short circuit in wiring harness from ignition coil to terminal "1M" (323) of ECU connector.
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