Indicator/Warning Message Description and Operation

Indicator/Warning Message Description and Operation































Door Ajar Indicator

The door ajar indicator system consists of the following components:

* Body control module (BCM)
* Door ajar switch each of the doors
* Rear compartment lid ajar switch
* Instrument panel cluster (IPC)

Each door lock contains a door ajar switch. The door ajar switches are an integral part of each door lock and are not serviced separately. The BCM supplies battery positive voltage to each door ajar switch and when the door is open, the door ajar switch signal is low. When the doors are closed, the door ajar switch contacts of each door are open. When a vehicle door is open, the door ajar switch contacts for that door are closed and the BCM interprets the flow of voltage as a discrete input from the door ajar switch. The BCM then sends the request to illuminate the corresponding door ajar indicator, through the class 2 serial data circuit to the IPC. The IPC illuminates the appropriate door ajar indicator.

ENGINE OIL CHANGE SOON (Change Oil Soon)

The instrument panel cluster (IPC) displays the CHANGE OIL SOON message in the DIC when the PCM/ECM determines that the engine oil life is less than 5 percent. The PCM/ECM sends a class 2 message to the IPC requesting the display of the CHANGE OIL MESSAGE in the DIC. After the oil is changed, reset the engine oil monitor. Refer to Driver Information Center (DIC) Description and Operation in Instrument Panel, Gages, and Console or to GM Oil Life System Resetting in Maintenance and Lubrication.

KM/H

The instrument panel cluster (IPC) displays the km/h indicator when the metric units is selected from the switch (if equipped with the base IPC U2E) or selected from the DIC information switch (if equipped with uplevel IPC UH8).

Low Fuel Indicator

The instrument panel cluster (IPC) displays the Low Fuel indicator when the IPC receives a class 2 message from the ECM/PCM indicating the fuel level remaining.

LOW FUEL

The instrument panel cluster (IPC) displays the LOW FUEL message in the DIC when the IPC receives a class 2 message indicating the fuel level remaining from the PCM/ECM (if equipped with uplevel IPC UH8).

Low Oil Level

The instrument panel cluster (IPC) displays the Low Oil Level indicator when the PCM/ECM detects a low engine oil level condition and the low oil level switch signal circuit is high. The PCM/ECM monitors the signal circuit of the engine oil level switch for a brief period when the key moves from ON to START to determine the oil level. The IPC receives a class 2 message from the PCM/ECM requesting display of the LOW OIL LEVEL message in the DIC (if equipped with uplevel IPC UH8).

LOW OIL

The instrument panel cluster (IPC) displays the LOW OIL LEVEL message in the DIC when the PCM/ECM detects a low engine oil level condition and the low oil level switch signal circuit is high. The PCM/ECM monitors the signal circuit of the engine oil level switch for a brief period when the key moves from ON to START to determine the oil level. The IPC receives a class 2 message from the PCM/ECM requesting display of the LOW OIL LEVEL message in the DIC (if equipped with uplevel IPC UH8).

Low Oil Pressure

The instrument panel cluster (IPC) displays the Low Oil Pressure indicator when the PCM/ECM detects a low engine oil pressure condition and the engine oil pressure sensor signal circuit is low. The IPC receives a class 2 message from the PCM/ECM requesting display of the Low Oil Pressure indicator.

LOW OIL PRESSURE

The instrument panel cluster (IPC) displays the LOW OIL PRESSURE message in the DIC when the PCM/ECM detects a low engine oil pressure condition and the engine oil pressure sensor signal circuit is low. The IPC receives a class 2 message from the PCM/ECM requesting display of the LOW OIL PRESSURE message in the DIC (if equipped with uplevel IPC UH8).

MPH

The instrument panel cluster (IPC) displays the MPH indicator when the metric units is requested from the switch (if equipped with the base IPC U2E) or selected from the DIC information switch (if equipped with uplevel IPC UH8).

Rear Compartment Lid Release

The rear compartment lid can be released by depressing the rear release button in the glove box or holding either front power door lock switch to the unlock position for a minimum of 2 seconds or by pressing the rear compartment release button on the key fob. The transmission must be in the PARK position for the rear compartment to release.

Service Vehicle Soon

The instrument panel cluster displays the Service Vehicle Soon indicator when the PCM/ECM detects certain vehicle malfunctions that are not related to the emissions system. The IPC receives a class 2 message from the PCM/ECM requesting display of the Service Vehicle Soon indicator.

SERVICE VEHICLE SOON

The instrument panel cluster displays the SERVICE VEHICLE SOON message in the DIC when the PCM/ECM detects certain vehicle malfunctions that are not related to the emissions system. The IPC receives a class 2 message from the PCM requesting the display of SERVICE VEHICLE SOON message in the DIC (if equipped with uplevel IPC UH8).