Schematic Reference: Instrument Cluster Schematics

1

Did you perform the Instrument Cluster Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Instrument Cluster

1. Start the engine.
2. Observe the engine oil pressure indicator.

Does the engine oil pressure indicator illuminate during the displays test, and then turn OFF?

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

Go to Step 3

1. Turn the ignition OFF.
2. Install a scan tool.
3. Start the engine.
4. With the scan tool, observe the Engine Oil Pressure Switch parameter in the PCM Engine Data 3 data list.

Does the Engine Oil Pressure Switch parameter display Low?

Go to Step 4

Go to Step 8

1. Turn the ignition OFF.
2. Disconnect the engine oil pressure switch.
3. Turn the ignition ON, with the engine OFF.
4. With a scan tool, observe the Engine Oil Pressure Switch parameter.

Does the Engine Oil Pressure Switch parameter display Low?

Go to Step 5

Go to Step 6

Test the signal circuit of the engine oil pressure switch for a short to ground. 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 pressure 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

Inspect for poor connections at the harness connector of the IPC. 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 11

Replace the engine oil pressure switch. Refer to Engine Oil Pressure Sensor and/or Switch Replacement in Engine Mechanical.

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 - 4.6L.

Did you complete the replacement?

Go to Step 12

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Important: Program the replacement IPC.

Replace the IPC. Refer to Instrument Cluster 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