Powertrain Control Module Inputs Diagnosis Engine Oil Pressure Switch
Refer to
IAC Valve, Generator, TR, Oil, and Coolant Switches
schematic.
Circuit Description
The Engine Oil Pressure Indicator is controlled by the Instrument Panel Cluster (IPC) via serial data from the Powertrain Control Module (PCM) . The Oil Pressure Indicator will also light when the engine is running if the engine oil pressure drops below approximately 13.8 kPa. (2 psi.).
As a bulb check procedure, the IPC will command this telltale ON when the IPC and PCM are powered up.
Step | Action | Value(s) | Yes | No | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
1 | Was the Powertrain On-Board Diagnostic (OBD) System Check performed? | -- | ||||||||||
2 | Are any PCM DTC(s) stored? | -- | Go to applicable DTCs | |||||||||
3 | Is the Engine Oil pressure Indicator ON? | -- | ||||||||||
4 | Check the engine for correct oil level. Refer to Fluid and Lubricant Recommendations in Maintenance and Lubrication. Is the Correct engine oil level indicated? | -- | ||||||||||
5 | Check the engine oil pressure with a manual pressure gauge. Refer to Oil Pressure Diagnosis and Testing in Engine Mechanical. Is proper engine oil pressure indicated? | -- | ||||||||||
6 | Disconnect the PCM harness connector and the Engine Oil Pressure Sensor Connector and check the oil pressure sensor input circuit for the following:
If a problem is found repair as necessary. Refer to Wiring Repairs in Wiring Systems. Was a Problem Found? | -- | ||||||||||
7 | Check the Communication circuit for correct operation. Was a problem Found? | -- | ||||||||||
8 | Check engine oil pressure sensor indicator for correct operation. Refer to Instrument Cluster System Check in Instrument Panel, Gauges and Console. If a problem is found repair as necessary. Was a problem found? | -- | ||||||||||
9 | Replace Engine Oil Pressure Sensor. Is the action complete? | -- | -- | |||||||||
10 | Determine cause of low oil. Refer to Oil Consumption Diagnosis Engine Mechanical. Is the action complete? | -- | ||||||||||
11 | Determine cause of low oil pressure. Refer to Oil Pressure Diagnosis and Testing in Engine Mechanical. Is the action complete? | -- | ||||||||||
12 | Check for the proper operation of Oil Pressure Indicator. Refer to Instrument Cluster System Check in Instrument Panel, Gauges and Console. Is the correct operation indicated? | System OK |
