Circuit Description
The Engine Oil Pressure Indicator is controlled by the Instrument Panel Cluster (IPC) as commanded by the Body Function Controller (BFC) 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, BFC, 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? | -- | Diagnose the PCM DTC(s) first. Go to Powertrain Control Module Diagnosis | |||||||||
3 | Is the Engine Oil pressure Indicator on ? | -- | ||||||||||
4 | Check the engine for correct oil level. Refer to General Information, Maintenance and lubrication . Is the Correct engine oil level indicated? | -- | ||||||||||
5 | Check the engine oil pressure with a manual pressure guage. Refer to 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 repair procedures in Electrical Diagnosis Was a Problem Found? | -- | ||||||||||
7 | Check the Communication circuit for correct operation. Refer to Electrical Diagnosis . Was a problem Found? | -- | ||||||||||
8 | Check engine oil pressure sensor indicator for correct operation. Refer to Instrument Panel Cluster . If a problem is found repair as necessary. Was a problem found? | -- | ||||||||||
9 | Replace Engine Oil Pressure Sensor. Is action complete? | -- | -- | |||||||||
10 | Determine cause of low oil. Refer to Engine Mechanical for diagnosis. Is Action Complete? | -- | ||||||||||
11 | Determine cause of low oil pressure. Refer to Engine Mechanical for diagnosis. Is Action Complete? | -- | ||||||||||
12 | Check for the proper operation of Oil Pressure Indicator. Refer to Instrument Panel Cluster Microprocessor . Is the correct operation indicated? | System Ok |
