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Home >> Mazda >> 2001 >> MX-5 Miata L4-1.8L DOHC >> Repair and Diagnosis >> Powertrain Management >> Emission Control Systems >> Exhaust Gas Recirculation >> EGR Boost Sensor >> Testing and Inspection
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EGR Boost Sensor: Testing and Inspection

NOTE: Perform the following test only when directed.

1. Inspect the EGR boost sensor for damage and cracks.
2. Inspect the vacuum hose for improper routing, kinks or leaks.
- If the above are okay, perform the "Circuit Open/Short Inspection."

3. Reconnect the EGR boost sensor connector.
- If the above open or short circuit are correct, replace EGR boost sensor.

Circuit Open/Short Inspection




Open circuit
- If there is no continuity, the circuit is open. Repair or replace the harness.
- EGR boost circuit (EGR boost sensor connector terminal B and PCM connector terminal 4AE.)
- Reference voltage circuit (EGR boost sensor connector terminal C and PCM connector terminal 4L.)
- GND circuit (EGR boost sensor connector terminal A and PCM connector terminal 4O through common connector.)

Short circuit
- If there is continuity, the circuit is shorted. Repair or replace the harness.
- EGR boost sensor connector terminal C and PCM connector terminal 4L through common connector to GND.
- EGR boost sensor connector terminal B and PCM connector 4AE through common connector to GND.
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