Indicator/Warning Message Description and Operation
Indicator/Warning Message Description and Operation
CHANGE ENGINE OIL
The driver information center (DIC) illuminates the CHANGE ENGINE OIL message when the engine control module (ECM) determines that the engine oil life is 0 percent. The ECM sends a class 2 message to the radio requesting illumination. After the oil is changed, reset the engine oil monitor. Refer to GM Oil Life System Resetting.
DRIVER DOOR AJAR
The driver door module (DDM) receives a discrete input from the driver door ajar switch. The integrated radio chassis (IRC) receives the status of the driver door from the DDM via class 2 serial data message. When the driver door is open and the vehicle is out of the PARK gear, the message is displayed on the driver information center (DIC). Also, if the vehicle speed is greater than 4.8 km/h (3 mph), the DIC displays the message and sends a class 2 serial data message requesting 5 chimes to sound. The door ajar indicator system only function is to alert the vehicle operator when a vehicle door has inadvertently been left ajar or open. Failure of the door ajar indicator system do not affect door locks or any other vehicle system.
ICE POSSIBLE
The radio illuminates the ICE POSSIBLE message when the outside air temperature drops below 2°C (36°F). When the temperature rises above 5.5°C (42°F), the ICE POSSIBLE message turns OFF. The radio receives a class 2 message indicating the outside air temperature from the dash integration module (DIM).
km/h and MPH
km/h
- The instrument panel cluster (IPC) illuminates the km/h indicator when the radio detects that metric units have been requested via the Eng/Met button. The radio sends a class 2 message indicating the requested units to the IPC.
MPH
- The IPC illuminates the MPH indicator when the radio detects that English units have been requested via the Eng/Met button. The radio sends a class 2 message indicating the requested units to the IPC.
Lateral Acceleration (JL4)
Lateral acceleration is a measure of how hard a vehicle is taking a corner. The electronic brake control module (EBCM) calculates the lateral acceleration during vehicle turns as part of the vehicle stability enhancement system (VSES). The EBCM sends a class 2 message to the instrument panel cluster (IPC) indicating the vehicle lateral acceleration. Lateral acceleration which is acceleration due to gravity is measured in a g. The lateral acceleration display in the message center measures from 0.00 g up to 1.2 g. Refer to ABS Description and Operation for more information the VSES system.
LEFT REAR DOOR AJAR
The left rear door module (LRDM) receives a discrete input from the left rear door ajar switch. The integrated radio chassis (IRC) receives the status of the LH rear door from the LRDM via class 2 serial data message. When the LH rear door is open and the vehicle is out of the PARK gear, the message is displayed on the driver information center (DIC). Also, if the vehicle speed is greater than 4.8 km/h (3 mph), the DIC displays the message and sends a class 2 serial data message requesting 5 chimes to sound. The door ajar indicator system only function is to alert the vehicle operator when a vehicle door has inadvertently been left ajar or open. Failure of the door ajar indicator system do not affect door locks or any other vehicle system.
LOW FUEL
The radio illuminates the FUEL LEVEL LOW message in the radio when the instrument panel cluster (IPC) determines that the fuel level is less than 9.48 liters (2.5 gallons). The IPC receives a class 2 message indicating the fuel level from the engine control module (ECM).
LOW OIL LEVEL
The radio illuminates the CHECK OIL LEVEL message when the engine control module (ECM) detects low engine oil level, and the signal circuit is low. The ECM only monitors the signal circuit of the engine oil level switch for a brief period when the key moves from ON to START. The radio receives a class 2 message requesting illumination from the ECM.
LOW OIL PRESSURE
The radio illuminates the OIL PRESSURE LOW STOP ENGINE message when the engine control module (ECM) detects low engine oil pressure, and the signal circuit is low. The radio receives a class 2 message requesting illumination from the ECM.
OIL PRESSURE LOW (JL4)
The message center illuminates the OIL PRESSURE LOW message when the engine control module (ECM) detects a low engine oil pressure condition, and the signal circuit is low. The IPC receives a class 2 message requesting the OIL PRESSURE LOW message from the ECM. The engine oil pressure should be a range of 140-550 kPa (20-80 psi). This OIL PRESSURE LOW message should correspond with the IPC engine oil pressure indicator.
OIL TEMPERATURE HOT (JL4)
The message center illuminates the OIL TEMPERATURE HOT message when the engine control module (ECM) detects a hot engine oil temperature condition. The IPC receives a class 2 message requesting the OIL PRESSURE HOT message from the ECM.
PASSENGER DOOR AJAR
The passenger front door module (PDM) receives a discrete input from the passenger front door ajar switch. The integrated radio chassis (IRC) receives the status of the passenger front door from the PDM via class 2 serial data message. When the passenger front door is open and the vehicle is out of the PARK gear, the message is displayed on the driver information center (DIC). Also, if the vehicle speed is greater than 4.8 km/h (3 mph), the DIC displays the message and sends a class 2 serial data message requesting 5 chimes to sound. The door ajar indicator system only function is to alert the vehicle operator when a vehicle door has inadvertently been left ajar or open. Failure of the door ajar indicator system do not affect door locks or any other vehicle system.
RIGHT REAR DOOR AJAR
The right rear door module (RRDM) receives a discrete input from the RH rear door ajar switch. The integrated radio chassis (IRC) receives the status of the RH rear door from the RRDM via class 2 serial data message. When the RH rear door is open and the vehicle is out of the PARK gear, the message is displayed on the driver information center (DIC). Also, if the vehicle speed is greater than 4.8 km/h (3 mph), the DIC displays the message and sends a class 2 serial data message requesting 5 chimes to sound. The door ajar indicator system only function is to alert the vehicle operator when a vehicle door has inadvertently been left ajar or open. Failure of the door ajar indicator system does not affect door locks or any other vehicle system.
SERVICE VEHICLE SOON
The radio illuminates the SERVICE VEHICLE SOON message when the engine control module (ECM) detects certain malfunctions that are not related to the emissions system. The radio receives a class 2 message requesting illumination from the ECM.
TOP SPEED FUEL CUT OFF (Export Only)
The radio illuminates the TOP SPEED FUEL CUT OFF message when the engine control module (ECM) detects that the vehicle speed is more than 120 km/h (75 mph). The radio receives a class 2 message requesting illumination from the ECM.
VEHICLE OVERSPEED (Export Only)
The radio illuminates the VEHICLE OVERSPEED message when the instrument panel cluster (IPC) detects that the vehicle speed is more than 120 km/h (75 mph). The radio receives a class 2 message requesting illumination from the IPC.