Diagnostic Aids
Before replacing control module, use an ohmmeter and check EGR valve resistances. Resistance between terminals "A" and "E" should be 7.8-8.6 ohms. Resistance between terminals "B" and "D" should be greater than 3000 ohms. Resistance between terminals "D" and "C" should start at .7 ohm and increase to about 4000 ohms as pintle is slowly moved inward.