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P2174-LOW AIRFLOW/RESTRICTION DETECTED (INSTANTANEOUS ACCUMULATION) (CONTINUED) 5. RESISTANCE IN THE (F855) 5-VOLT SUPPLY CIRCUIT Turn the ignition off. Disconnect the Throttle Body harness connector. Disconnect the C2 PCM harness connector. CAUTION: Do not probe the PCM harness connectors. Probing Is the resistance below 100 ohms? Yes >> Go To 6 No >> Repair the excessive resistance in the (F855) 5-volt Sup- ply circuit. Perform the POWERTRAIN VERIFICATION TEST. (Refer 6. (F855) 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND Measure the resistance between ground and (F855) 5-volt Supply cir- Is the resistance above 100k ohms? Yes >> Go To 7 No >> Repair the short to ground in the (F855) 5-volt Supply cir- cuit. Perform the POWERTRAIN VERIFICATION TEST. (Refer 9 - 938 ENGINE - ELECTRICAL DIAGNOSTICS - 3.7L/4.7L/5.7L DR/DH |