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11. MAF SENSOR 5 VOLT SUPPLY CIRCUIT OPEN Turn the ignition off. Disconnect the MAF Sensor harness connector. Disconnect the ECM harness connectors. Measure the resistance of the MAF Sensor 5 Volt Supply circuit. Is the resistance below 10.0 ohms? Yes >> Go To 12 No >> Repair the MAF Sensor 5 Volt Supply circuit for an open. Perform the ECM Verification Test Ver. 1 (Refer to 9 - 12. MAF SENSOR 5 VOLT SUPPLY CIRCUIT SHORTED TO THE MAF SENSOR GROUND CIRCUIT Turn the ignition off. Disconnect the MAF Sensor harness connector. Disconnect the ECM harness connectors. Measure the resistance between the MAF Sensor 5 Volt Supply circuit Is the resistance above 1000 ohms? Yes >> Go To 13 No >> Repair the MAF Sensor 5 Volt Supply circuit for a short to the MAF Sensor Ground circuit. Perform the ECM Verification Test Ver. 1 (Refer to 9 - 13. MAF SENSOR 5 VOLT SUPPLY CIRCUIT SHORTED TO GROUND Turn the ignition off. Disconnect the MAF Sensor harness connector. Disconnect the ECM harness connectors. Measure the resistance between ground and the MAF Sensor 5 Volt Is the resistance below 1000 ohms? Yes >> Repair the MAF Sensor 5 Volt Supply circuit for a short to ground. Perform the ECM Verification Test Ver. 1 (Refer to 9 - No >> Go To 14 9 - 746 ENGINE DIESEL DIAG KJ |