For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Did you perform the instrument cluster diagnostic system check? | -- | Go to Step 2 | Go to Diagnostic System Check - Instrument Cluster
2 | Verify the CHECK ENG OIL LEVEL message is always on. Does the system operate normally? | -- | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3
3 |

1. Install scan tool.
2. Turn ON the ignition, with the engine OFF.
3. With a scan tool select PCM IPC data list.

Does the engine oil level message data value indicate OK?

--

Go to Step 4

Go to Step 5

4 | Important: Perform the set up procedure for the replacement IPC. Replace the IPC. Refer to Instrument Cluster Replacement . Did you complete the replacement and the set up procedure? | -- | Go to Step 10 | --
5 |

1. Turn OFF the ignition.
2. Disconnect the PCM connector C2.
3. Turn ON the ignition, with the engine OFF.
4. Using a test lamp probe the signal circuit of the engine oil level indicator switch to ground. Refer to Circuit Testing in Wiring Systems.

Does the test lamp illuminate?

--

Go to Step 6

Go to Step 7

6 |

1. Disconnect the engine oil level indicator switch connector.
2. Leave the test lamp connected from the previous step.

Does the test lamp illuminate?

--

Go to Step 8

Go to Step 9

7 | Important: Perform the reprogramming procedure for the replacement PCM. Replace the PCM. Refer to Powertrain Control Module Replacement/Programming in Engine Controls - 3.4L. Did you complete the replacement and the set up procedure? | -- | Go to Step 10 | --
8 | Repair a short to ground in the signal circuit of the engine oil level indicator switch. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 10 | --
9 | Replace the engine oil level indicator switch. Refer to Engine Oil Level Sensor and/or Switch Diagnosis in Engine Controls-3.4L. Did you complete the repair? | -- | Go to Step 10 | --
10 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 3