P0523

DTC P0523 (WITH RPO CODE L47)

CIRCUIT DESCRIPTION
The engine oil pressure (EOP) switch changes resistance based on engine oil pressure. The PCM monitors the signal circuit of the EOP switch. When the oil pressure is high, the sensor resistance is high and the PCM senses a high signal voltage. When the oil pressure is low, the sensor resistance is low and the PCM senses a low signal voltage. The PCM sends the engine oil pressure information to the IPC via the class 2 serial data circuit.

CONDITIONS FOR RUNNING THE DTC
- The ignition is ON, with the engine OFF.
- P1635 is not set.

CONDITIONS FOR SETTING THE DTC
- The PCM detects that the EOP switch signal circuit is greater than 4.9 volts.
- The above condition is present for greater than 9 seconds.

ACTION TAKEN WHEN THE DTC SETS
The PCM records the operating conditions at the time the diagnostic fails. The PCM displays this information in the Failure Records on the scan tool.

CONDITIONS FOR CLEARING THE DTC
- The DTC becomes history when the conditions for setting the DTC are no longer present.
- The history DTC clears after 40 malfunction free warm-up cycles.
- The PCM receives a clear code command from the scan tool.

DIAGNOSTIC AIDS
Using the Failure Records data may aid in locating an intermittent condition. If you cannot duplicate the DTC, the information included in the Failure Records data can aid in determining how many miles since the DTC set. The Fail Counter and Pass Counter can also aid determining how many ignition cycles the diagnostic reported a pass and/or a fail.

TEST

Steps 1-8:

Steps 9-10: