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P0404-EGR POSITION SENSOR PERFORMANCE (CONTINUED) 3. EXCESSIVE RESISTANCE IN THE (F856) 5-VOLT SUPPLY CIRCUIT Turn the ignition off. Disconnect the EGR Solenoid harness connector. Disconnect the C1 and C2 PCM harness connectors. CAUTION: Do not probe the PCM harness connectors. Probing Is the resistance below 5.0 ohms? Yes >> Go To 4 No >> Repair the excessive resistance in the (F856) 5-volt Sup- ply circuit. Perform POWERTRAIN VERIFICATION TEST. (Refer to 9 4. (K34) EGR SENSOR SIGNAL CIRCUIT SHORTED TO GROUND Measure the resistance between ground and the (K34) EGR Sensor Is the resistance below 5.0 ohms? Yes >> Repair the short to ground in the (K34) EGR Sensor Sig- nal circuit. Perform POWERTRAIN VERIFICATION TEST. (Refer to 9 No >> Replace the EGR Assembly. Perform POWERTRAIN VERIFICATION TEST. (Refer to 9 9 - 406 ENGINE ELECTRICAL DIAGNOSTICS ND |