Engine Oil Pressure Gage Inaccurate or Inoperative 4.3L, 4.8L, 5.3L, 6.0L Engines
Step | Action | Value(s) | Yes | No | ||||
|---|---|---|---|---|---|---|---|---|
Schematic Reference: Instrument Cluster Schematics Connector End View Reference: Master Electrical Component List | ||||||||
1 | Did you perform the Instrument Cluster Diagnostic System Check? | -- | Go to Step 2 | |||||
2 | Start the engine. Does the engine oil pressure (EOP) gage display within the specified range? | 207-483 kPa (30-70 psi) | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 | ||||
3 |
Does the engine oil pressure gage move up and down when commanded? | -- | Go to Step 4 | Go to Step 15 | ||||
4 |
Does the scan tool indicate that the Engine Oil Pressure parameter is at or greater than the specified value? | 4.6 V | Go to Step 5 | Go to Step 6 | ||||
5 |
Does the scan tool indicate that the Engine Oil Pressure parameter is at or less than the specified value? | 0.4 V | Go to Step 11 | Go to Step 7 | ||||
6 |
Does the voltage measure greater than the specified value? | 4.6V | Go to Step 10 | Go to Step 8 | ||||
7 |
Does the resistance measure less than the specified value? | 5 ohms | Go to Step 12 | Go to Step 9 | ||||
8 | Test the EOP 5-volt reference circuit for a for an open, for a short to ground, 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 16 | Go to Step 9 | ||||
9 | Test the EOP low reference circuit for high resistance or for an open. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 16 | Go to Step 10 | ||||
10 | Test the EOP oil pressure sensor signal circuit for a for an open, for a short to ground, or for a high resistance. 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 16 | Go to Step 12 | ||||
11 | Inspect for poor connections at the harness connector of the EOP sensor. 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 16 | Go to Step 13 | ||||
12 | 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 16 | Go to Step 14 | ||||
13 | Replace the engine oil pressure sensor. Refer to the following procedures:
Did you complete the replacement? | -- | Go to Step 16 | -- | ||||
14 |
Important: Program the replacement PCM. Replace the PCM. Refer to the following procedures:
Did you complete the replacement? | -- | Go to Step 16 | -- | ||||
15 | Replace the IPC. Refer to Instrument Cluster Replacement . Did you complete the replacement? | -- | Go to Step 16 | -- | ||||
16 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 2 | ||||
Engine Oil Pressure Gage Inaccurate or Inoperative 6.6L (LB7) Engine
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Schematic Reference: Instrument Cluster Schematics Connector End View Reference: Master Electrical Component List | ||||
1 | Did you perform the Instrument Cluster Diagnostic System Check? | -- | Go to Step 2 | |
2 | Start the engine. Does the engine oil pressure (EOP) gage display within the specified range? | 207-483 kPa (30-70 psi) | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
3 |
Does the engine oil pressure gage move up and down when commanded? | -- | Go to Step 4 | Go to Step 14 |
4 |
Are both of the resistance values within the specified range? | 6k-16k ohms | Go to Step 5 | Go to Step 10 |
5 | Measure the voltage between the 5-volt reference circuit of the EOP sensor and the low reference circuit of the EOP sensor Does the voltage measure greater than the specified value? | 4.6V | Go to Step 9 | Go to Step 6 |
6 | Test the EOP 5-volt reference circuit for a for an open, for a short to ground, 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 15 | Go to Step 7 |
7 |
Does the resistance measure less than the specified value? | 5 ohms | Go to Step 11 | Go to Step 8 |
8 | Test the EOP low reference circuit for high resistance or for an open. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 15 | Go to Step 11 |
9 | Test the EOP oil pressure sensor signal circuit for a for an open, for a short to ground, or for a high resistance. 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 15 | Go to Step 11 |
10 | Inspect for poor connections at the harness connector of the EOP sensor. 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 15 | Go to Step 12 |
11 | Inspect for poor connections at the harness connector of the ECM. 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 15 | Go to Step 13 |
12 | Replace the engine oil pressure sensor. Refer to Engine Oil Pressure Sensor and/or Switch Replacement in Engine Mechanical - 6.6L. Did you complete the replacement? | -- | Go to Step 15 | -- |
13 |
Important: Program the replacement ECM. Replace the ECM. Refer to Engine Control Module Replacement in Engine Controls - 6.6L Did you complete the replacement? | -- | Go to Step 15 | -- |
14 | Replace the IPC. Refer to Instrument Cluster Replacement . Did you complete the replacement? | -- | Go to Step 15 | -- |
15 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 2 |
Engine Oil Pressure Gage Inaccurate or Inoperative 8.1L Engine
Step | Action | Values | Yes | No |
|---|---|---|---|---|
Schematic Reference: Instrument Cluster Schematics | ||||
1 | Did you perform the Diagnostic System Check - Vehicle? | -- | Go to Step 2 | |
2 |
Does the engine oil pressure gage move up and down when commanded? | -- | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
3 | Replace the instrument panel cluster (IPC). Refer to Instrument Cluster Replacement. Did you complete the replacement? | -- | Go to Step 4 | -- |
4 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 2 |
