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P2175-LOW AIRFLOW/RESTRICTION DETECTED (SLOW ACCUMULATION) (CONTINUED) 13. MAP SENSOR Connect the C1 PCM harness connector. Ignition on, engine not running. With a scan tool, monitor the MAP Sensor voltage. Connect a jumper wire between the (K1) MAP Signal circuit and the Cycle the ignition switch from off to on. With a scan tool, monitor the MAP Sensor voltage. Does the scan tool display MAP voltage from approximately 4.9 Yes >> Replace the MAP Sensor. Perform the POWERTRAIN VERIFICATION TEST. (Refer No >> Go To 14 NOTE: Remove the jumper wire before continuing. 14. RESISTANCE IN THE (K1) MAP SIGNAL CIRCUIT Turn the ignition off. Disconnect the C2 PCM harness connector. Measure the resistance of the (K1) MAP Signal circuit from the MAP Is the resistance below 5.0 ohms? Yes >> Go To 15 No >> Repair the excessive resistance in the (K1) MAP Signal circuit Perform the POWERTRAIN VERIFICATION TEST. (Refer 9 - 954 ENGINE - ELECTRICAL DIAGNOSTICS - 3.7L/4.7L/5.7L DR/DH |