Schematic Reference: Driver Information System Schematics

Did you perform the Driver Information Center Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Driver Information Systems

1. Install a scan tool.
2. Turn the ignition ON, with the engine OFF.
3. With a scan tool, observe the Engine Oil Level Switch parameter in the PCM Engine Data  2 list.

Does the Engine Oil Level Switch parameter display OK?

Go to Step 3

Go to Step 4

Does the DIC display CHECK OIL LEVEL?

Go to Step 11

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

1. Turn the ignition OFF.
2. Disconnect the engine oil level switch.
3. Connect a fused jumper wire between the oil level switch signal circuit and a good ground.
4. Turn the ignition ON, with the engine OFF.
5. With the scan tool, observe the Engine Oil Level Switch parameter.

Does the Engine Oil Level Switch parameter display OK?

Go to Step 6

Go to Step 5

Test the oil level switch signal circuit for an open or a high resistance. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 12

Go to Step 8

Test the ground circuit of the engine oil level switch for an open or for a high resistance. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 12

Go to Step 7

Inspect for poor connections at the harness connector of the engine oil level switch. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 12

Go to Step 9

Inspect for poor connections at the harness connector of the PCM. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 12

Go to Step 10

Replace the engine oin Engine Mechanical Engine Oil Level Sensor and/or Switch Replacement in Engine Mechanical - 4.0L.

Did you complete the replacement?

Go to Step 12

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Important: Program the replacement PCM.

Replace the PCM. Refer to Powertrain Control Module Replacement in Engine Controls - 4.0L.

Did you complete the replacement?

Go to Step 12

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Replace the DIC. Refer to Driver Information Center Module Replacement .

Did you complete the replacement?

Go to Step 12

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2