Mazda 6 manuals

Mazda 6 Service Manual: Egr valve inspection

Operation Test

Carry out the EGR Control Inspection. (See EGR Control System Inspection.

Resistance Inspection

Note

1. Disconnect the negative battery cable.

2. Inspect resistance of the EGR valve coils.




Circuit Open/Short Inspection

1. Disconnect the PCM connector. (See PCM REMOVAL/INSTALLATION.)

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


Open circuit

- EGR valve terminal E (harness-side) and PCM terminal 4E

- EGR valve terminal A (harness-side) and PCM terminal 4H

- EGR valve terminal B (harness-side) and PCM terminal 4K

- EGR valve terminal F (harness-side) and PCM terminal 4N

- EGR valve terminal C or D (harness-side) and main relay terminal C (harness-side)

Short circuit

- EGR valve terminal E (harness-side) and GND

- EGR valve terminal A (harness-side) and GND

- EGR valve terminal B (harness-side) and GND

- EGR valve terminal F (harness-side) and GND

- EGR valve terminal C or D (harness-side) and power supply

3. Remove the EGR valve, and inspect for any damage or clogging.

Egr valve removal/installation
1. Disconnect the negative battery cable. 2. Disconnect the EGR valve connector. 3. Remove in the order indicated in the table. 4. Install in the reverse order of removal. Water Hose Removal N ...

Pcv valve inspection
1. Disconnect the negative battery cable. 2. Remove the intake maniforld.(see INTAKE-AIR SYSTEM REMOVAL/INSTALLATION.) 3. Remove the PCV valve. 4. Blow through the valve and verify that air flows a ...

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