For 1990-2009 cars

## Engine Oil Pressure Gauge Always Low Warning Off w/Low Oil Pressure

Step | Action | Values | Yes | No
--- | --- | --- | --- | ---
DEFINITION: Low engine oil pressure warning inactive with low engine oil pressure.
1 | Did you perform the Audible Warning System Check performed? | -- | Go to Step 2 | Go to Audible Warnings System Check
2 |

1. Disconnect the engine oil pressure indicator switch.
2. Connect a fused jumper between terminal 1 of the engine oil pressure indicator switch and a known good ground.
3. Start the engine.

Does the low engine oil pressure warning buzzer operate?

--

Go to Step 3

Go to Step 4

3 | Replace the engine oil pressure indicator switch. Is the replacement complete? | -- | Go to Step 7 | --
4 |

1. Disconnect the gauge cluster connector.
2. Use the DMM in order to measure the resistance between terminal 1 of the engine oil pressure indicator switch connector and terminal 15 of the gauge cluster connector.

Is the measured resistance less than the specified value?

5 ohms

Go to Step 6

Go to Step 5

5 | Locate and repair the open or high resistance in CKT PU1. Is the repair complete? | -- | Go to Step 7 | --
6 | Replace the gauge cluster. Is the replacement complete? | -- | Go to Step 7 | --
7 |

1. Connect all connectors and components that were removed previously.
2. Verify that the engine oil pressure warning buzzer operates properly.

Does the engine oil pressure warning buzzer operate properly?

--

System OK

Go to Step 2

## Engine Oil Pressure Gauge Always Low Warning On w/Norm Oil Pressure

Step | Action | Values | Yes | No
--- | --- | --- | --- | ---
DEFINITION: Low engine oil pressure warning is active with normal engine oil pressure.
1 | Did you perform the Audible Warning System Check? | -- | Go to Step 2 | Go to Audible Warnings System Check
2 |

1. Disconnect the engine oil pressure indicator switch.
2. Start the engine.

Is the low engine oil pressure audible warning buzzer on for a long period of time?

--

Go to Step 4

Go to Step 3

3 | Replace the engine oil pressure indicator switch. Is the replacement complete? | -- | Go to Step 5 | --
4 | Locate and repair the short to ground in CKT PU1. Did you find and correct the condition? | -- | Go to Step 5 | Go to Step 6
5 |

1. Connect all connectors and components that were previously removed.
2. Test the engine oil pressure warning buzzer.

Does the engine oil pressure warning buzzer operate properly?

--

System OK

Go to Step 2

6 | After verifying that no short to ground is present in CKT PU1, replace the gauge cluster. Is the replacement complete? | -- | Go to Step 5 | --