For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Turn the ignition switch to the RUN position. Is the SERVICE ENGINE SOON indicator on? | -- | Go to Step 2 | Go to Instrument Cluster Indicators and Gauges Inoperative
2 |

1. Disconnect the engine oil pressure indicator switch connector.
2. Connect a (3 amp) fused jumper between the engine oil pressure indicator switch connector terminal A and ground.
3. Turn the ignition switch to the RUN position.

Is the Oil Pressure warning indicator on?

--

Go to Step 3

Go to Step 4

3 |

1. Check for a poor connection at the engine oil pressure indicator switch connector.
2. If OK, replace the engine oil pressure switch. Refer to Engine Oil Pressure Sensor and/or Switch Replacement in Engine Mechanical.

Has the repair been made and the system rechecked?

--

System OK

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4 | Check for a poor connection or open in circuit 31 between the instrument cluster harness connector C1 terminal A and the engine oil pressure indicator switch harness connector terminal A. Is there a poor connection or open in circuit 31? | -- | Go to Step 5 | Go to Step 6
5 | Repair the poor connection or open in circuit 31. Has the repair been made and the system rechecked? | -- | System OK | --
6 |

1. Check the oil pressure warning indicator bulb and bulb connection.
2. If OK, replace the instrument cluster. Refer to Instrument Cluster Replacement .

Has the repair been made and the system rechecked?

--

System OK

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