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Low Engine Oil Level Indicator Always On

Low Engine Oil Level Indicator Always On

Step Action Yes No
Schematic Reference: Instrument Cluster Schematics 
1 Did you perform the Diagnostic System Check - Vehicle? Go to Step 2  Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With a scan tool, observe the Engine Oil Level Switch parameter in the powertrain control module (PCM) Engine Data 2 data list.
Does the Engine Oil Level Switch parameter display OK?		 Go to Step 3  Go to Step 4 
3 Is the CHECK OIL LEVEL message in the driver information center (DIC) illuminated? Go to Step 9  Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
4
  1. Turn OFF the ignition.
  2. Disconnect the engine oil level switch.
  3. Connect a 3-amp fused jumper between the signal circuit of the engine oil level switch and a good ground.
  4. Turn ON the ignition, 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 
5 Test the signal circuit of the engine oil level switch for an open, for a high resistance, or for a short to battery voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 13  Go to Step 8 
6 Test the ground circuit of the engine oil level switch for an open or for a high resistance. Refer to Circuit Testing andWiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 13  Go to Step 7 
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 Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 13  Go to Step 10 
8 Inspect for poor connections at the harness connector of the PCM. 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 13  Go to Step 11 
9 Inspect for poor connections at the harness connector of the instrument panel cluster (IPC). 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 13  Go to Step 12 
10 Replace the engine oil level switch. Refer to Engine Oil Level Sensor and/or Switch Replacement in Engine Mechanical - 4.6L.
Did you complete the replacement?		 Go to Step 13  -
11 Replace the PCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.
Did you complete the replacement?		 Go to Step 13  -
12 Replace the IPC. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.
Did you complete the replacement?		 Go to Step 13  -
13 Operate the system in order to verify the repair.
Did you correct the condition?		 System OK Go to Step 2 
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