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P0073-INLET AIR TEMP SENSOR VOLTAGE TOO HIGH (CONTINUED) For the Engine circuit diagram (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES/ENGINE CON- For a complete wiring diagram Refer to Section 8W. • When Monitored: • Set Condition: Possible Causes DTC RETURNS INLET AIR TEMPERATURE SENSOR (K69) SIGNAL CIRCUIT OPEN (Y502) RETURN CIRCUIT OPEN (K69) SIGNAL CIRCUIT SHORTED INTERMITTENT CONDITION ECM Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - Diagnostic Test 1. DTC RETURNS Turn the ignition on. With the scan tool, erase DTCs. With the scan tool, read DTCs. With the scan tool, record all Freeze frame data. Did the DTC return? Yes >> Go To 2 No >> Refer to the INTERMITTENT CONDITION Symptom (Diagnostic Procedure). (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) 2. INLET AIR TEMPERATURE SENSOR Turn the ignition off. Disconnect the Inlet Air Temp sensor harness connector. Check connectors - Clean/repair as necessary. Measure the resistance of the Inlet Air temp sensor Is the resistance between 300 and 90k ohms? Yes >> Go To 3 No >> Replace the Inlet air temperature sensor. Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC- 9 - 1070 ENGINE - ELECTRICAL DIAGNOSTICS - DIESEL DR/DH |