Indicator/Warning Message Description and Operation

INDICATOR/WARNING MESSAGE DESCRIPTION AND OPERATION













IPC INDICATORS







DIC WARNING MESSAGES

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 drops below 5 percent. The ECM sends a GMLAN message to the instrument panel cluster (IPC) requesting the CHANGE ENGINE OIL display. After the oil is changed, reset the engine oil monitor. Refer to GM Oil Life System - Resetting. 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 turn off. After the oil is changed, reset the engine oil monitor. Refer to GM Oil Life System - Resetting

ENGINE OIL PRESSURE
The instrument panel cluster (IPC) displays the engine oil pressure 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 should detect 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 GMLAN serial data message.The IPC receives a GMLAN message requesting display of the engine oil pressure indicator from the ECM.

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

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.

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

CHECK OIL LEVEL
The driver information center (DIC) displays CHECK OIL LEVEL 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 GMLAN message indicating a low engine oil level condition. Refer to GM Oil Life System - Resetting. 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 turn off. After the oil is changed, reset the engine oil monitor. Refer to GM Oil Life System - Resetting

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

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

CHECK GAS CAP
The driver information center (DIC) displays CHECK GAS CAP when the fuel tank cover is covered. The instrument panel cluster (IPC) receives a GMLAN message indicating the fuel tank cover needs to be closed.

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