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Home >> Mazda >> 2001 >> B2500 SE, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System & Component Testing >> Emission Systems & Sub-Systems >> Exhaust Catalyst
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Exhaust Catalyst

  1. Disable secondary air injection system. Run engine at 2500 RPM for 2 minutes. Turn ignition off. Disconnect and ground one spark plug wire or disconnect one ignition coil for coil on plug applications.
  2. Start and operate engine at 1000 RPM. Disconnect IAC valve. Using an infrared temperature probe, measure surface temperature at catalytic converter inlet and outlet. Outlet temperature should be at least 50°F (28°C) greater than inlet temperature. Replace catalytic converter, if necessary. Reconnect ignition system, IAC valve and secondary air injection.
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