Diagnostic Instructions
DTC Descriptor
DTC P1617 : Engine Oil Level Switch Circuit
Diagnostic Fault Information
Circuit
| Short to Ground
| Open/High Resistance
| Short to Voltage
| Signal Performance
|
Engine Oil Level Switch Signal Circuit
| --
| P1617
| P1617
| --
|
Engine Oil Level Switch Ground Circuit
| --
| P1617
| --
| --
|
Circuit/System Description
The engine oil level switch is a normally closed switch that opens when there is a low engine oil level condition. When the switch is open the engine control module (ECM) will detect a high signal voltage input. With the ignition switch turned ON and the
engine OFF, the ECM should detect a full oil level or a low signal voltage input. The instrument panel cluster (IPC) displays the Low Engine Oil Level message in the driver information center (DIC) when a low engine oil level condition is present.
Conditions for Running the DTC
| • | The vehicle is travelling at a speed greater than 5 km/h (3 mph). |
| • | The throttle position is greater than 5 percent. |
| • | The engine speed is at least 2,000 RPM. |
| • | The vehicle is cruising and is not accelerating. |
| • | The following DTCs are not set: |
Conditions for Setting the DTC
| • | The ECM does not detect a transition from a low voltage to a high voltage when the engine speed is at least 2,000 RPM. |
| • | The above condition is present for at least 5 minutes. |
| • | The condition may be present for up to 25 minutes before setting a DTC. |
Action Taken When the DTC Sets
| • | The ECM records the operating conditions at the time the diagnostic test fails. The ECM displays this information in the Failure Records on the scan tool. |
| • | The IPC displays the low engine oil level message in the DIC. |
Conditions for Clearing the DTC
| • | The DTC becomes history when the conditions for setting the DTC are no longer present. |
| • | The history DTC clears after 40 malfunction-free warm-up cycles. |
Reference Information
Schematic Reference
Connector End View Reference
Electrical Information Reference
Scan Tool Reference
Scan Tool Data List
Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the engine oil level switch.
- Ignition OFF, test for less than 1 ohm of resistance between the low reference circuit terminal C and ground.
| ⇒ | If greater than 1 ohm, test the ground circuit terminal C for an open/high resistance. |
- Ignition ON, verify the scan tool Engine Oil Level Switch parameter is Low.
| ⇒ | If not Low, test the signal circuit terminal A for a short to ground. If the circuit tests normal, replace the ECM. |
- Ignition ON, install a 3A fused jumper wire between the signal circuit terminal A and ground. Verify the scan tool Engine Oil Level Switch parameter is Ok.
| ⇒ | If not Ok, test the signal circuit terminal A for a short to voltage or an open/high resistance. If the circuit tests normal, replace the ECM. |
- If all circuits test normal, test or replace the engine oil level switch.
Repair Instructions
Perform the
Diagnostic Repair Verification
after completing the diagnostic procedure.
