P0523

Schematic:

CIRCUIT DESCRIPTION

The engine oil pressure sensor is a solid state transducer. The engine oil pressure sensor sends oil pressure information to the Powertrain Control Module (PCM). The PCM then transmits the oil pressure information to the Instrument Panel Cluster (IPC) via serial data (CKT 1807).

Engine oil pressure is displayed on the scan tool in volts. A low voltage reading indicates low oil pressure. As the oil pressure increases, the voltage level also increases. The normal range of the engine oil level sensor signal voltage is 0.5 volts at 0 kPa (0 psi) to 4.5 volts at 883 kPa (128 psi).

CONDITIONS FOR RUNNING
^ The engine is running.
^ No 5 V reference A codes are set.

CONDITIONS FOR SETTING
^ The engine oil pressure sensor voltage is equal to or more than 4.6 volts.
^ The above condition exists for 9 seconds.

ACTION TAKEN WHEN THE DTC SETS
^ The PCM will not illuminate the Malfunction Indicator Lamp (MIL).
^ The PCM will store conditions which were present when the DTC set as Failure Records data only. This information will not be stored as Freeze Frame data.

CONDITIONS FOR CLEARING THE MIL/DTC
^ A History DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.
^ The DTC can be cleared by using a scan tool.

DIAGNOSTIC AIDS
For diagnosis of the instrument panel, refer to A Diagnostic System Check - Instrument Cluster in Instrument Panel, Gauges and Console. Testing and Inspection
Check for the following conditions:
^ A faulty connection at the PCM or the engine oil pressure sensor.
Inspect the harness connectors for the following conditions:
- Backed out terminals
- Improper mating
- Broken locks
- Improperly formed or damaged terminals
- Faulty terminal to wire connections
^ Inspect the wiring harness for damage.
^ The Engine Oil Pressure Sensor diagnostic table is intended to isolate electrical faults that affect the engine oil pressure sensor, the PCM, and related circuits. If a problem with engine oil pressure can not be isolated using the Engine Oil Pressure Sensor diagnostic table, refer to A Diagnostic System Check - Instrument Cluster in Instrument Panel, Gauges and Console. Testing and Inspection


TEST DESCRIPTION

Diagnostic Chart:

The numbers below refer to the step numbers on the diagnostic table.
12. This vehicle is equipped with a PCM which utilizes an Electrically Erasable Programmable Read-only Memory (EEPROM). When the PCM is replaced, the new PCM must be programmed.