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Home >> Mazda >> 2004 >> 6 L4-2.3L >> Repair and Diagnosis >> Powertrain Management >> Emission Control Systems >> Exhaust Gas Recirculation >> EGR Boost Control Solenoid >> Testing and Inspection
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EGR Boost Control Solenoid: Testing and Inspection

EGR BOOST SENSOR SOLENOID VALVE INSPECTION

Airflow Inspection

NOTE: Perform the following procedure only when directed.

1. Disconnect the negative battery cable.
2. Remove the EGR boost sensor solenoid valve.







3. Inspect airflow between each port under the following conditions.
- If not as specified, replace the EGR boost sensor solenoid valve.
- If as specified, carry out the "Circuit Open/Short Inspection".

Circuit Open/Short Inspection

1. Disconnect the PCM connector.




2. Inspect the following wiring harness for open or short (Continuity check).

Open circuit

- If there is no continuity, the circuit is open. Repair or replace the harness.
- EGR boost sensor solenoid valve terminal B (harness-side) and PCM terminal 47
- EGR boost sensor solenoid valve terminal A (harness-side) and main relay terminal C (harness-side)

Short circuit

- If there is continuity, the circuit is shorted. Repair or replace the harness.
- EGR boost sensor solenoid valve terminal B (harness-side) and body GND
- EGR boost sensor solenoid valve terminal A (harness-side) and power supply
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