Engine Test Description The numbers below refer to the step numbers in the diagnostic table. 1. The Diagnostic System Check prompts the technician to comp 10. Engine Controls lete some basic checks and store the Freeze Frame data on the scan tool if applicable. This creates an electronic copy of the data taken occurred. The information is then when the fault stored in the scan tool for later reference. 2. This step will determine if the fault is present. 7. This step checks for an open or a short in the MAF sensor signal circuit between the MAF sensor and the PCM. This step checks whether th caused the DTC P0102 is st vehicle under these conditio the fault is present. After pe tool clear DTC information f e malfunction that ill present. Driving the ns will verify whether rforming the scan unction, the DTC P0102 Engine Controls - 2.5L (LE8) 6-1451 DTC P0102 diagnostic can be monitored on the scan tool under the Not Ran Since Code Cleared selection in the DTC information menu. If a DTC P0102 appears in the Not Ran Since Code Cleared list, the P0102 diagnostic has not yet run. When the DTC P0102 does not appear in the Not Ran Since Code Cleared list, the P0102 diagnostic has run. If the MIL is NOT illuminated, and there is no Pending DTC Status in DTC Information, the P0102 diagnostic has passed. The DTCs MUST be cleared in order to view the Current Status of the Not Ran Since Code Cleared list. DO NOT forget that the Not Ran Since Code Cleared list only indicates that the test has run, not whether the test passed or failed. The DTC Information screen must be checked for Current or Pending status, in order to determine the outcome of the diagnostic test involved. Step Action I Value(s) I Yes I No Schematic Reference: IAC Valve, VSS, MAP Sensor 1 Did you perform the D Controls? iagnostic System CheckEngine Go to Diagnostic System Check - Go to Step 2 Engine Controls 2. 3. 1. is the MAF within the specified range? Start the engine. Install a scan tool. With the throttle closed, select the mass air flow (MAF) sensor parameter on the scan tool. 2,5-4.6 g/S Go to Step 3 Go to Step 4 1. 2. 3. 4. Does the DTC run and pass? Use the scan tool in order to clear the DTCs. Turn OFF the ignition for 30 seconds. Start the engine. Operate the vehicle with the DTC as specified in the DTC diagnostic has Description. in the Conditions for Running the supporting text or until run. Refer to the Test Go to Go to Step 4 Diagnostic Aids 1. 2. 3. 4. Is the voltage near the specified value? Turn OFF the ignition. Disconnect the MAF sensor connector. Turn ON the ignition, leaving the engine OFF. Measure the voltage from the MAF sensor ignition feed circuit using a DMM connected to ground. B+ Go to Step 5 Go to Step 6 1. 2. 3. 4. 5. Is the voltage within the specified range? Turn OFF the ignition. Reconnect the MAF sensor connector. Start the engine. Backprobe the MAF sensor signal circuit at PCM using a DMM, Measure the voltage while the engine is idling, 1.51.8 V Go to Step 9 Go to Step 7 Repair the open or the short circuit in the MAF sensor ignition feed circuit. Systems, Is the action complete? Refer to Wiring Repairs in Wiring Go to Step 10