Engine Oil Pressure Indicator Always On 3.5L
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Instrument Cluster Schematics Connector End View Reference: Instrument Panel, Gages, and Console Connector End Views , and Powertrain Control Module Connector End Views in Engine Controls - 3.5L | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
2 | Start the engine. Does the engine oil pressure indicator illuminate after the displays test? | Go to Step 3 | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems |
3 |
Does the Engine Oil Pressure Switch parameter display Ok? | Go to Step 10 | Go to Step 4 |
4 |
Does the Engine Oil Pressure Switch parameter display Ok? | Go to Step 6 | Go to Step 5 |
5 | 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 11 | Go to Step 7 |
6 | 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 11 | Go to Step 8 |
7 | 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 11 | Go to Step 9 |
8 | Replace the engine oil pressure switch. Refer to Engine Oil Pressure Sensor and/or Switch Replacement in Engine Mechanical - 3.5L. Did you complete the replacement? | Go to Step 11 | -- |
9 | 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 11 | -- |
10 | 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 11 | -- |
11 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Engine Oil Pressure Indicator Always On 3.9L
Step | Action | Values | Yes | No | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
Schematic Reference: Instrument Cluster Schematics Connector End View Reference: Master Electrical Component List | ||||||||||
1 | Did you perform the Diagnostic System Check - Vehicle? | -- | Go to Step 2 | |||||||
2 | Does the engine oil pressure (EOP) indicator display in the message center? | -- | Go to Step 3 | Go to Testing for Intermittent Conditions and Poor Connections | ||||||
3 |
Is the Engine Oil Pressure Sensor parameter within the specified range? | 207-483 kPa (30-70 psi) | Go to Step 15 | Go to Step 4 | ||||||
4 |
Does the scan tool indicate that the Engine Oil Pressure Sensor parameter is at or greater than the specified value? | 550 kPa (80 psi) | Go to Step 5 | Go to Step 6 | ||||||
5 |
Does the scan tool indicate that the Engine Oil Pressure Sensor parameter is at or less than the specified value? | 0 kPa (0 psi) | Go to Step 11 | Go to Step 7 | ||||||
6 |
Does the voltage measure greater than the specified value? | 4.6 V | 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 the following:
Refer to Circuit Testing and Wiring Repairs . 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 Wiring Repairs . 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 the following:
Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . 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 Connector Repairs . 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 engine control module (ECM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | -- | Go to Step 16 | Go to Step 14 | ||||||
13 | Replace the engine oil pressure sensor. Refer to Engine Oil Pressure Sensor and/or Switch Replacement for the 3.9L engine. Did you complete the replacement? | -- | Go to Step 16 | -- | ||||||
14 | Replace the ECM. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | -- | Go to Step 16 | -- | ||||||
15 | Replace the IPC. Refer to Control Module References for replacement, setup, and programming. 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 | ||||||
