Indicators

The instrument panel cluster (IPC) indicators illuminate by one of the following methods:
^ The IPC detects a concern with a discrete input.
^ A module sends an indicator illumination request message, via the class 2 serial data line

The driver information center (DIC) may display messages when some indicators illuminate. Several different conditions may illuminate some IPC indicators.

AIR BAG (Red)
The IPC illuminates the AIR BAG indicator whenever the inflatable restraint sensing and diagnostic module (SDM) sends a class 2 message requesting illumination, via the class 2 serial data line. The IPC flashes the indicator 7 times during the bulb check. The IPC illuminates the indicator until the IPC receives a deactivate class 2 message from the SDM. The IPC illuminates the AIR BAG indicator whenever the IPC detects a loss of communications with the SDM.

ANTILOCK Indicator (Amber)
The ANTILOCK indicator is located in the instrument cluster and illuminates if a malfunction in the ABS is detected by the EBCM. The ANTILOCK indicator informs the driver that a condition exists which results in turning the antilock brake and traction control function on. If only the ANTILOCK indicator is on, normal braking with full power assist is available. If the BRAKE and ANTILOCK indicators are on, a problem may exist in the hydraulic brake system. The following conditions will cause the ANTILOCK indicator to illuminate:
^ The instrument cluster bulb check. When the ignition is turned ON, the ANTILOCK indicator will turn ON for approximately 3 second and then turn OFF.
^ An ABS malfunction detected.

Illumination of the BRAKE warning indicator may indicate reduced braking ability. Illumination of the ANTILOCK indicator without the BRAKE warning indicator ON indicates only that ABS braking is no longer available. Power assisted braking without ABS control is still available. Refer to A Diagnostic System Check in Brakes and Traction Control for diagnosis of any condition which causes the BRAKE warning indicator to illuminate.

Battery (Red)
The IPC illuminates the battery indicator whenever the dash integration module (DIM) or the powertrain control module (PCM) sends a class 2 message requesting illumination, via the class 2 serial data line. The indicator identifies a charging condition or a load management condition in the electrical system. The PCM determines if a charging condition exists. The DIM determines if there is a condition in the load management. If a condition exists, the DIM commands Battery Saver Active. When the instrument cluster receives this message the indicator illuminates. The IPC also illuminates the indicator during the bulb check.

BRAKE Warning Lamp (Red)
The red BRAKE warning indicator in the instrument cluster illuminates to warn the driver of conditions in the brake system which may result in reduced braking ability. The indicator stays illuminated until the condition has been repaired. The following conditions will cause the red BRAKE warning indicator to illuminate:
^ The instrument cluster bulb check. When the ignition is turned ON, the red BRAKE warning indicator will turn ON for approximately 3 seconds and then turn OFF.
^ When a DTC C1248 is set, the EBCM will command the red BRAKE warning indicator ON via class 2 serial data message.
^ When the parking brake is applied or not fully released.
^ When the brake fluid level switch is closed (the brake fluid is low in the master cylinder reservoir).

Fasten Safety Belt (ISO Symbol) (Red)
The IPC illuminates the fasten safety belt indicator whenever the inflatable restraint sensing and diagnostic module (SDM) sends a class 2 message requesting illumination, via the class 2 serial data line. The IPC also illuminates the indicator during the bulb check.

High Beam (Blue)
The high beam indicator is illuminated by the IPC when the Dash Integration Module (DIM) sends a class 2 message indicating that the high beams are on. The indicator has a connection to battery voltage for use when ignition voltage is low. The IPC also illuminates the indicator during the bulb check.

Left Turn (Green)
The IPC illuminates the left turn indicator when the IPC detects a high (voltage) input condition. The indicator turns OFF within 150 milliseconds after the cluster detects the high input is low. If the cluster determines that the turn signal remains ON for more than 1.29 km (0.8 mile), the IPC sends a class 2 message requesting the chime to sound. The signal source comes from the exterior lighting system via a discrete input.

LOW TRAC (Amber)
The LOW TRAC indicator is controlled by the instrument cluster via class 2 serial data messages from the EBCM. When the ABS, TCS, or VSES is active for 0.5 seconds, the EBCM commands the instrument cluster to turn ON the LOW TRAC indicator. The LOW TRAC indicator will also turn ON during the instrument cluster bulb check. When the ignition switch is turned to ON, the LOW TRAC indicator will turn ON for approximately 3 seconds and then turn OFF.

Right Turn (Green)
The IPC illuminates the right turn indicator when the IPC detects a high (voltage) input condition. The indicator turns OFF within 150 milliseconds after the cluster detects the high input is low. If the cluster determines that the turn signal remains ON for more than 1.29 km (0.8 mile), the IPC sends a class 2 message requesting the chime to sound. The signal source comes from the exterior lighting system via a discrete input.

SECURITY (Amber)
The IPC illuminates the SECURITY indicator whenever the rear integration module (RIM) or Inkey theft deterrent module (VTD) sends a class 2 message requesting illumination via the class 2 serial data line. Depending on the information the IPC receives from the modules, the indicator either flashes or has a solid display. The indicator has a connection to battery voltage for use when the ignition key is OFF. The IPC requests a chime for the indicator if the power mode is RUN and the vehicle is not in PARK. The IPC also illuminates the indicator during the bulb check and when a system SOH failure is present.

SERVICE ENGINE SOON (MIL) (Amber)
The SERVICE ENGINE SOON indicator identifies the ready status of the engine's emission system. The PCM activates the indicator with a low side drive circuit. The IPC illuminates the indicator during bulb check.

SERVICE VEHICLE SOON (Amber)
The SERVICE VEHICLE SOON indicator turns on when the PCM detects a non-emissions failure or when the DIM detects an ignition switch condition. The IPC keeps track of why the indicator illuminated. The IPC does not deactivate the indicator until all of the conditions for activation are not present. The PCM illuminates the indicator the during bulb check.

TRAC OFF Indicator
The following conditions will cause the TRAC OFF indicator to illuminate:
^ The instrument cluster bulb check. When the ignition switch is turned to ON, the TRAC OFF indicator will turn ON for approximately 3 seconds and then turn OFF.
^ The EBCM has disabled the TCS.
^ The driver manually disabling the TCS via the traction control switch.

The indicator is controlled by the instrument cluster via class 2 serial messages from the EBCM. There are no hard wires involved in the indicator control.