ABS Indicator
The IPC illuminates the ABS indicator when the following occurs:
| • | The electronic brake control module (EBCM) detects a malfunction with the antilock brake system. The IPC receives a class 2 message from the EBCM requesting illumination. |
| • | The IPC performs the bulb check. |
| • | The IPC detects a loss of class 2 communications with the EBCM. |
Air Bag Indicator
The IPC illuminates the air bag indicator when the following occurs:
| • | The inflatable restraint sensing and diagnostic module (SDM) detects a malfunction with the supplemental inflatable restraint system. The IPC receives a class 2 message from the SDM requesting illumination. |
| • | The IPC performs the bulb check. The IPC flashes the air bag indicator 7 times. |
| • | The IPC detects a loss of class 2 communications with the SDM. |
Brake Warning Indicator
The IPC illuminates the brake warning indicator when the following occurs:
| • | The body control module (BCM) detects that the park brake is engaged. The IPC receives a class 2 message from the BCM requesting illumination. If the vehicle is shifted out of park with the park brake engaged, the BCM sends a class 2 message to the radio in order to activate the audible warning. |
| • | The IPC detects a low brake fluid condition. |
| • | The IPC performs the bulb check. |
Charge Indicator
The IPC illuminates the charge indicator in the message center when the following occurs:
| • | The PCM detects that the generator output is less than 11 volts or greater than 16 volts. The IPC receives a class 2 message from the PCM requesting illumination. |
| • | The IPC determines that the system voltage is less than 11 volts or greater than 16 volts. The IPC receives a class 2 message from the body control module (BCM) indicating the system voltage. |
| • | The IPC performs the bulb check. |
| • | The ignition is on, with the engine off. |
CRUISE Indicator
The IPC illuminates the CRUISE indicator when the PCM detects that the cruise control is requested. The IPC receives a class 2 message from the PCM requesting illumination.
Door Ajar Indicator
The IPC illuminates the DOOR AJAR indicator in the message center when the body control module (BCM) detects any of the vehicle doors are open. The IPC receives a class 2 message from the BCM requesting illumination.
Engine Coolant Indicator(s)
HOT COOLANT TEMP
The IPC illuminates the HOT COOLANT TEMP indicator in the message center when the IPC determines that the coolant temperature is greater than 123°C (253.4°F). The IPC receives a class 2 message from the PCM indicating the coolant temperature.
LOW COOLANT LEVEL
The IPC illuminates the LOW COOLANT LEVEL indicator in the message center when the IPC detects a low coolant level condition (signal is low).
Engine Oil Indicator(s)
CHANGE ENGINE OIL
The IPC illuminates the CHANGE ENGINE OIL indicator in the message center when the PCM determines that the engine oil should be changed. The IPC receives a class 2 message from the PCM requesting illumination. Once the oil is changed, perform the engine oil monitor reset procedure in order to clear the CHANGE ENGINE OIL indicator. Refer to GM Oil Life System Resetting in Maintenance and Lubrication.
LOW ENG OIL LEVEL
The IPC illuminates the LOW ENG OIL LEVEL indicator in the message center when the PCM detects a low engine oil level condition (signal is low). The IPC receives a class 2 message from the PCM requesting illumination.
LOW OIL PRESSURE
The IPC illuminates the LOW OIL PRESSURE indicator in the message center when the PCM detects low oil pressure (signal is low). The IPC receives a class 2 message from the PCM requesting illumination.
Fasten Safety Belt Indicator
The IPC illuminates the fasten safety belt indicator when the following occurs:
| • | The inflatable restraint sensing and diagnostic module (SDM) detects that the driver's seat belt is unbuckled. The IPC receives a class 2 message from the SDM requesting illumination. The IPC illuminates the indicator for 20 seconds and then flashes the indicator for 55 seconds. The IPC also sends a class 2 message to the radio in order to activate the audible warning. |
| • | The IPC performs the bulb check. |
| • | The IPC detects a loss of class 2 communications with the SDM. |
Lighting System Indicator(s)
High Beam
The IPC illuminates the high beam indicator when the body control module (BCM) detects that the high beams are requested. The IPC receives a class 2 message from the BCM requesting illumination.
HIGHBEAM OUT
The IPC illuminates the HIGHBEAM OUT indicator in the message center when the body control module (BCM) detects an open in one of the highbeam lamp circuits. The IPC receives a class 2 message from the BCM requesting illumination.
Turn Signals
The IPC illuminates the right or left turn signal indicator when the IPC detects a turn signal request or a hazard request. If the IPC determines that the turn signal is active for more than 1.2 km (0.75 mile), the IPC sends a class 2 message to the radio in order to activate the audible warning.
Low Fuel Indicator
The IPC illuminates the LOW FUEL indicator in the message center when the IPC detects that the fuel level is less than a pre-determined value. The IPC receives a class 2 message from the PCM indicating the fuel level percent.
Low Tire Pressure Indicator
The IPC illuminates the LOW TIRE PRESSURE indicator in the message center when the electronic brake control module (EBCM) detects low pressure in any of the four tires. The IPC receives a class 2 message from the EBCM requesting illumination.
Low Washer Fluid Indicator
The IPC illuminates the LOW WASHER FLUID indicator in the message center when the IPC detects a low washer fluid condition (signal circuit is low).
Malfunction Indicator Lamp (MIL)
The PCM illuminates the check engine indicator when the following occurs:
| • | The PCM detects a malfunction in the emissions system. |
| • | The PCM performs the bulb check. |
Overspeed Indicator (Export)
The IPC illuminates the OVER SPEED indicator in the message center when the IPC determines that the vehicle speed is greater than 120 km/h. The IPC receives a class 2 message from the PCM indicating vehicle speed.
Rear Hatch/Gate Ajar Indicator
The IPC illuminates the TRUNK OPEN indicator in the message center when the body control module (BCM) detects that the trunk is open (signal is low). The IPC receives a class 2 message from the BCM requesting illumination.
Security System Indicator(s)
The IPC illuminates the SECURITY indicator in the message center when the body control module (BCM) detects a malfunction in the security system. The IPC receives a class 2 message from the BCM requesting illumination.
Traction Control System Indicator(s)
SERVICE TRACTION CONTROL
The IPC illuminates the SERVICE TRACTION CONTROL indicator in the message center when the electronic brake control module (EBCM) detects a malfunction in the traction control system. The IPC receives a class 2 message from the EBCM requesting illumination.
TRACTION ACTIVE
The IPC illuminates the TRACTION ACTIVE indicator in the message center when the electronic brake control module (EBCM) detects a traction control event. The IPC receives a class 2 message from the EBCM requesting illumination.
TRAC OFF
The IPC illuminates the TRAC OFF indicator when the electronic brake control module (EBCM) inhibits the traction control system. The IPC receives a class 2 message from the EBCM requesting illumination.
Service Vehicle Soon Indicator
The IPC illuminates the SERVICE VEHICLE SOON indicator in the message center when the following occurs:
| • | The body control module (BCM) detects certain malfunctions in the lighting system or the horn system. The IPC receives a class 2 message from the BCM requesting illumination. |
| • | The PCM detects certain non-emissions related malfunctions. The IPC receives a class 2 message from the PCM requesting illumination. |
Engine Coolant Temperature Gauge
The IPC displays the engine coolant temperature as determined by the PCM. The IPC receives a class 2 message from the PCM indicating the engine coolant temperature. The engine coolant temperature gauge defaults to 160°F (75°C) or below if:
| • | The PCM detects a malfunction in the engine coolant temperature sensor circuit. |
| • | The IPC detects a loss of class 2 communications with the PCM. |
Engine Oil Pressure Gauge
The IPC displays the engine oil pressure as determined by the PCM. The IPC receives a class 2 message from the PCM indicating the engine oil pressure. The engine oil pressure gauge defaults to 0 psi (0 kPa) or below if:
| • | The PCM detects a malfunction in the engine oil pressure sensor circuit. |
| • | The IPC detects a loss of class 2 communications with the PCM. |
Fuel Gauge
The IPC displays the fuel level as determined by the PCM. The IPC receives a class 2 message from the PCM indicating the fuel level percent. The fuel gauge defaults to E (empty) if:
| • | The PCM detects a malfunction in the fuel level sensor circuit. |
| • | The IPC detects a loss of class 2 communications with the PCM. |
When the fuel level is less than a pre-determined value, the low fuel indicator illuminates.
Odometer
The IPC contains a season odometer and a trip odometer. Momentarily press the trip/reset switch on the IPC in order to toggle between the season odometer and the trip odometer. Press the trip/reset switch for greater than 2 seconds, while the trip odometer is displayed, in order to reset the trip odometer. The IPC displays the vehicle mileage and trip mileage as determined by the IPC. The IPC calculates the mileage based on the vehicle speed signal circuit from the PCM. The odometer will display 'error' if an internal IPC memory failure is detected. The odometer displays either miles or kilometers as requested by the simultaneous activation of the RESET and the MODE buttons on the driver information center (DIC) (if equipped).
PRNDL Display
The IPC displays the selected gear position as determined by the PCM. The IPC receives a class 2 message from the PCM indicating the gear position. The PRNDL display blanks if:
| • | The PCM detects a malfunction in the transmission range switch circuit. |
| • | The IPC detects a loss of class 2 communications with the PCM. |
Speedometer
The IPC displays the vehicle speed based on the information from the vehicle speed sensor. The IPC receives a class 2 message from the PCM indicating the vehicle speed. The IPC calculates the vehicle speed based on the class 2 message indicating the wheel reference speed from the EBCM if:
| • | The PCM detects a malfunction in the vehicle speed sensor circuit. |
| • | The IPC detects a loss of class 2 communications with the PCM. |
The speedometer defaults to 0 mph (0 kph) if the IPC detects a loss of class 2 communications with both the PCM and the EBCM.
Tachometer
The IPC displays the engine speed as determined by the PCM. The IPC receives a class 2 message from the PCM indicating the engine speed. The tachometer will default to 0 rpm if:
| • | The PCM detects a malfunction in the engine speed sensor circuit. |
| • | The IPC detects a loss of class 2 communications with the PCM. |
Voltmeter
The IPC displays the system voltage as determined by the body control module (BCM). The IPC receives a class 2 message from the BCM indicating the system voltage. The voltmeter will default to 8 volts if:
| • | The BCM detects a malfunction in the BCM power circuit. |
| • | The IPC detects a loss of class 2 communications with the BCM. |
