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Home >> Mazda >> 2007 >> 3 Mazdaspeed, 2.3 L >> Repair and Diagnosis >> Engine Performance >> System >> Symptom Troubleshooting (L3 With TC) >> Engine Control System Operation Inspection >> Fuel Injector Operation Inspection >> If simulation function of M-MOS is not used:
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If simulation function of M-MOS is not used:

OPERATION OF FUEL INJECTOR INSPECTION

STEP INSPECTION ACTION
1 Perform the KOER self-test function using the M-MDS.
(See KOEO/KOER SELF TEST .)
Are DTCs P0201, P0202, P0203 and/or P0204 present?
Yes Go to appropriate DTC test.
(See DTC TABLE .)
No Go to the next step.
2 Inspect the fuel injector for each cylinder.
Is the fuel injector normal?
Yes Go to the next step.
No Replace the fuel injector.
3 Inspect the following for the suspected cylinder:
  • Fuel injector power and/or ground system related wiring harnesses and connectors.
  • PCM terminals (pulled-out pins, corrosion)
  • Fuel injector terminals (pulled-out pins, corrosion)

Are all items normal?
Yes Inspect PCM terminal voltage of fuel injector signal
No Repair or replace malfunctioning parts.