Indicator/Warning Message Description and Operation

Indicator/Warning Message Description and Operation





























CHANGE ENGINE OIL

The driver information center (DIC) displays the CHANGE ENGINE OIL SOON message when the engine control module (ECM) determines that the engine oil life is below 5 percent. The ECM sends a serial data message to the instrument panel cluster (IPC) requesting the CHANGE ENGINE OIL message. After the oil is changed, reset the engine oil monitor. Refer to GM Oil Life System Resetting (Service and Repair) . Refer to the following before adding or changing engine oil:

* When the Low Engine Oil Level/Change Engine Oil Soon message displays in the IPC or DIC due to a low engine oil level condition, make sure that the ignition is turned OFF before adding or changing the oil in the vehicle. Failure to do so may result in the Low Engine Oil Level/Change Engine Oil Soon message staying on after the engine attains proper oil level.
* Before replacing the IPC because of the Low Engine Oil Level/Change Engine Oil Soon message staying ON after an oil change or engine oil addition, it is necessary for the engine to undergo a thermocycle process. The IPC may not be malfunctioning but only needs the Low Engine Oil Level/Change Engine Oil Soon to turn Off. After the oil is changed, reset the engine oil monitor. Refer to GM Oil Life System Resetting (Service and Repair)



CHECK GAS CAP

The driver information center (DIC) displays CHECK GAS CAP when the fuel tank cover is not covered. The instrument panel cluster (IPC) receives a serial data message from the ECM indicating the fuel tank cover needs to be closed.


CHECK OIL LEVEL

The driver information center (DIC) displays CHECK OIL LEVEL message when the engine control module (ECM) detects a low engine oil level condition from the engine oil level sensor/switch. The instrument panel cluster (IPC) receives a serial data message indicating a low engine oil level condition. Refer to GM Oil Life System Resetting (Service and Repair) . Refer to the following before adding or changing engine oil:

* When the Low Engine Oil Level/Change Engine Oil Soon indicator displays in the IPC or DIC due to a low engine oil level condition, make sure that the ignition is turned OFF before adding or changing the oil in the vehicle. Failure to do so may result in the Low Engine Oil Level/Change Engine Oil Soon message staying on after the engine attains proper oil level.
* Before replacing the IPC because of the Low Engine Oil Level/Change Engine Oil Soon staying ON after an oil change or engine oil addition, it is necessary for the engine to undergo a thermocycle process. The IPC may not be malfunctioning but only needs the Low Engine Oil Level/Change Engine Oil Soon to turned off. After the oil is changed, reset the engine oil monitor. Refer to GM Oil Life System Resetting (Service and Repair) .



Engine Oil Pressure

The instrument panel cluster (IPC) displays the engine oil pressure indicator as determined by the engine control module (ECM). The ECM monitors the engine oil pressure switch signal circuit to determine the engine oil pressure. With the ignition switch turned ON and the engine not running, the ECM detects a low signal voltage input. With the engine running, the pressure switch opens, and the ECM should detect a high signal voltage input. The ECM tests the state of the engine oil pressure (EOP) switch signal circuit with the ignition switch turned ON, and the engine turned OFF. The ECM sends the EOP information to the IPC via a serial data message. The IPC receives a serial data message requesting display of the engine oil pressure indicator from the ECM.


FUEL LEVEL LOW

The driver information center (DIC) displays FUEL LEVEL LOW when the instrument panel cluster (IPC) detects that the fuel level is less than 7.84 percent. The IPC receives a serial data message from the ECM indicating the fuel level.


ICE POSSIBLE

The driver information center (DIC) displays ICE POSSIBLE for 10 seconds when the ambient air temperature drops below 2.0°C (36°F). The instrument panel cluster (IPC) receives a serial data message from the HVAC control module indicating the ambient air temperature


km/h and MPH
km/h
- The instrument panel cluster (IPC) displays the km/h indicator when the cluster detects that Metric units have been requested.

MPH
- The IPC displays the MPH indicator when the cluster detects that English units have been requested.




OIL PRESSURE LOW

The driver information center (DIC) displays OIL PRESSURE LOW STOP ENGINE message when the engine control module (ECM) detects a low engine oil pressure condition from the engine oil pressure (EOP) sensor/switch. The instrument panel cluster (IPC) receives a serial data message from the ECM requesting display of the low oil pressure message.


SERVICE VEHICLE SOON

The driver information center (DIC) displays SERVICE VEHICLE SOON message when the engine control module (ECM) detects certain malfunctions that are not related to the emissions system. The instrument panel cluster (IPC) receives a serial data message from the ECM requesting the display of SERVICE VEHICLE SOON message.


TRUNK AJAR

The driver information center (DIC) displays the TRUNK AJAR message when the body control module (BCM) detects that the trunk is ajar or open. The IPC receives a serial data message from the BCM requesting TRUNK AJAR displayed in the DIC. If the vehicle is in the forward or reverse gear position, the BCM activates an audible warning.


VEHICLE OVERSPEED

The driver information center (DIC) displays VEHICLE OVERSPEED message when the instrument panel cluster (IPC) determines that the vehicle speed is more than 120 km/h (75 mph).