Schematic Reference: Instrument Cluster Schematics

Connector End View Reference: Engine Control Module Connector End Views in Engine Controls - 2.8L, or Engine Control Module Connector End Views in Engine Controls - 3.6L, or Engine Controls Connector End Views in Engine Controls - 5.7L, or Inline Harness Connector End Views in Wiring Systems

Did you perform the Diagnostic System Check - Vehicle ?

Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

Start the engine.

Does the engine oil pressure (EOP) indicator illuminate after the displays test?

Go to Step 3

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

1. Install a scan tool.
2. With a scan tool, observe the Engine Oil Pressure Switch parameter in the engine control module (ECM) Engine Data 1 list.

Does the Engine Oil Pressure Switch parameter display OK?

Go to Step 10

Go to Step 4

1. Turn OFF the ignition.
2. Disconnect the EOP switch.
3. Start the engine.
4. With the scan tool, observe the Engine Oil Pressure Switch parameter.

Does the Engine Oil Pressure Switch parameter display OK?

Go to Step 6

Go to Step 5

Test the EOP switch signal circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 11

Go to Step 7

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

Did you find and correct the condition?

Go to Step 11

Go to Step 8

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

Did you find and correct the condition?

Go to Step 11

Go to Step 9

Replace the EOP switch. Refer to Engine Oil Pressure Sensor and/or Switch Replacement in Engine Mechanical - 2.8L, or Engine Oil Pressure Sensor and/or Switch Replacement in Engine Mechanical - 3.6L, or Engine Oil Pressure Sensor and/or Switch Replacement in Engine Mechanical - 5.7L.

Did you complete the replacement?

Go to Step 11

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Replace the ECM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 11

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Replace the instrument panel cluster (IPC). Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 11

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2