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Engine Management – V6 – Diagnostics Page 6C1-2–142
Step Action Yes No 8 Using Tech 2, select the DTC display function. Does Tech 2 display any DTCs? Go to the appropriate DTC Table in this Section System OK When all diagnosis and repairs are completed, clear all DTCs and check the system for correct operation. 7.31 DTC P0521, P0522 or P0523 DTC Descriptors This diagnostic procedure supports the following DTCs: • DTC P0521 – Oil Pressure Sensor Range / Performance • DTC P0522 – Oil Pressure Sensor Voltage Low • DTC P0523 – Oil Pressure Sensor Voltage High Circuit Description The ECM applies a positive 5 V reference voltage to the engine oil pressure (EOP) sensor through the 5 V reference The EOP sensor provides signal voltage to the ECM that is proportional to the oil pressure generated by the engine oil The ECM monitors and compares the EOP sensor signal voltage against a specified range. An EOP sensor circuit DTC Conditions for Running the DTC DTC P0521, P0522 and P0523 run continuously when the engine is running. Conditions for Setting the DTC P0521 The ECM detects engine oil pressure is: • greater than 800 kPa at idle, or • engine rpm is greater than 2000 rpm and oil pressure is less than 8 kPa. P0522 The oil pressure sensor signal voltage is less than 0.2 V for more than 10 seconds. P0523 The oil pressure sensor signal voltage is more than 4.9 V for more than 10 seconds. Conditions for Clearing DTC The EOP sensor circuit DTCs are Type B DTC. Refer to 1.4 Diagnostic Trouble Codes in this Section, for action taken when a Type B DTC sets and conditions for clearing Type B DTCs. Additional Information • Refer to 6C1-1 Engine Management – V6 – General Information for details of the EOP sensor operation. • For an intermittent fault condition, refer to 5.2 Intermittent Fault Conditions in this Section. • Since fault condition in a wiring connector may trigger DTCs, always test the connectors related to this diagnostic |