how does a PCM pull a 0522, 0523 code
09-27-2009, 03:10 PM
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TECH Apprentice
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how does a PCM pull a 0522, 0523 code on another forum we were talking wiring, specifically the oil psi sensor and lube oil low, high sensor. I mentioned the oil psi sensor only goes to gages, at least when I did my it seemed to be dead headed to nothing, single wire, so how does a PCM throw out a 0522/0523, low/high oil pressure? Is it gage fed?
09-27-2009, 05:42 PM
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F-body only goes to gauge, the newer vehicles with lsx go to PCM/ECM.
DTC P0522
Circuit Description
The engine oil pressure (EOP) sensor is mounted in the top rear of the engine. The EOP sensor measures changes in engine oil pressure. The EOP sensor has a 5-volt reference, a ground and a signal circuit. The EOP sensor changes resistance based on engine oil pressure and is used to determine when the oil pressure is below a certain threshold. When the oil pressure reaches a predetermined value, the powertrain control module (PCM) will determine this as low oil pressure. The PCM will then send a serial data message to the Instrument to activate the Check Oil warning icon. When the PCM senses a signal voltage lower than the normal operating range of the sensor, DTC P0522 will set.
Conditions for Running the DTC
The engine is running.
Conditions for Setting the DTC
• The powertrain control module (PCM) detects that the EOP sensor signal circuit is less than 0.48 volts.
• The above condition is present for greater than 9 seconds.
Action Taken When the DTC Sets
• The PCM will not illuminate the malfunction indicator lamp (MIL).
• The PCM records the operating conditions at the time the diagnostic fails.
• The PCM stores this information in the Failure Records.
• The multifunction display (MFD) in the instrument cluster will display a message at key-on and key-off.
DTC P0522
Circuit Description
The engine oil pressure (EOP) sensor is mounted in the top rear of the engine. The EOP sensor measures changes in engine oil pressure. The EOP sensor has a 5-volt reference, a ground and a signal circuit. The EOP sensor changes resistance based on engine oil pressure and is used to determine when the oil pressure is below a certain threshold. When the oil pressure reaches a predetermined value, the powertrain control module (PCM) will determine this as low oil pressure. The PCM will then send a serial data message to the Instrument to activate the Check Oil warning icon. When the PCM senses a signal voltage lower than the normal operating range of the sensor, DTC P0522 will set.
Conditions for Running the DTC
The engine is running.
Conditions for Setting the DTC
• The powertrain control module (PCM) detects that the EOP sensor signal circuit is less than 0.48 volts.
• The above condition is present for greater than 9 seconds.
Action Taken When the DTC Sets
• The PCM will not illuminate the malfunction indicator lamp (MIL).
• The PCM records the operating conditions at the time the diagnostic fails.
• The PCM stores this information in the Failure Records.
• The multifunction display (MFD) in the instrument cluster will display a message at key-on and key-off.
