MX-5 Miata Mazdaspeed L4-1.8L DOHC Turbo (2004)
EGR Valve: Testing and Inspection
EGR VALVE INSPECTION
Resistance Inspection
NOTE: Perform the following test only when directed.
1. Disconnect the negative battery cable.
2. Inspect resistance of the EGR valve coils.
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If as specified, inspect the vacuum hoses for improper routing, kinks or leakage, and carry out "Circuit Open/Short Inspection".
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If not as specified, replace the EGR valve.
3. Remove the EGR valve, and inspect for any damage or clogging. If not as specified, replace the EGR valve.
4. Connect the negative battery cable.
Circuit Open/Short Inspection
Open circuit
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GND circuit (EGR valve connector terminal E and PCM connector terminal 2E)
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GND circuit (EGR valve connector terminal A and PCM connector terminal 2F)
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GND circuit (EGR valve connector terminal B and PCM connector terminal 2H)
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GND circuit (EGR valve connector terminal F and PCM connector terminal 2I)
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Power circuit (EGR valve connector terminal C or D and main relay connector terminal D through common connector)
