Warnings And Messages
The message center warning messages alert the operator to possible concerns or malfunctions in the vehicle operating systems. Warning messages are generally associated with other observable outputs of the IPC (gauges, informational indicators and RTT indicators). For example, when the ABS module detects a low brake fluid condition, the ABS module sends the IPC a request through the GWM to illuminate the brake warning indicator and a request to display the LOW BRAKE FLUID message in the message center. This allows the message center to be a more informative supplement to the IPC gauges and indicators.
Adaptive Cruise Control
The message center provides messages explaining the need for driver intervention and system status. The adaptive cruise control messages are supplemental to the cruise control RTT indicator and the adaptive cruise control warning chime.
Adaptive Headlamps
The message center provides the adaptive headlamp fault message to inform the driver of a fault with the adaptive headlamps.
Adaptive Steering
The message center provides the adaptive steering messages to inform the driver of system faults. Depending on the state, the message can be either informational or a warning.
AdvanceTrac
The message center provides messages to inform the driver of the AdvanceTrac system status. The messages are supplemental to the stability-traction control system indicators or RTT indicators.
Auto Hold
The message center provides messages to inform the driver of the auto hold system status. The messages are supplemental to the auto hold RTT indicator.
Auto Stop-Start
The message center provides additional instructions for driver intervention or warning messages when a fault in the auto stop/start system is detected.
Automatic Engine Shutdown
The message center provides multiple messages explaining the status of an impending engine idle shut down.
Brake System
The message center provides messages related to the brake system for detected brake system faults, parking brake status or faults or if the brake fluid level is low. The messages are supplemental to the brake warning indicator or RTT indicator.
Brake Applied - Power Reduced
The message center provides a brake applied warning message to inform the driver that the brake pedal and accelerator pedals are both applied.
Change 4WD Lubrication
The message center provides the change 4WD lube to inform the driver to change the transfer case lube.
Check Fuel Door (HEV)
The message center provides a check fuel door message as a reminder to close the fuel door.
Check Fuel Fill Inlet (Gas, Diesel)
The message center provides a check fuel fill inlet message to warn the driver there is a problem with the fuel fill inlet pipe resulting in a significant evaporative emission leak following vehicle refueling.
Diesel Exhaust Over-Temperature
The message center provides a message informing the driver that the PCM has detected an exhaust over-temperature condition due to a powertrain fault.
Diesel Low Fuel Pressure
The message center provides a low fuel pressure message informing the driver the fuel pressure is low.
Diesel Particulate Filter Cleaning
The IPC provides an informational message informing the driver of the status of the DPF regeneration.
Diesel Reduced Engine Power
The IPC provides an informational message informing the driver that the PCM is reducing engine power as a result of certain engine faults.
Door, Hood, Power Tailgate Ajar
The IPC provides door, hood and power tailgate ajar warnings to indicate the status of the doors, hood and tailgate.
Electronic Lock Differential (eLocker)
The message center provides informational and fault messages to inform the driver of the ELD status.
Engine Oil Level
The message center provides a low engine oil level warning message to inform the driver the engine oil level is low.
Engine Oil Life, Engine Oil Change Minder
The instrument cluster provides messages to inform the driver about the engine oil life status, engine oil life reset status and when an engine oil change is required. The duration of the interval between engine oil changes is calculated in the PCM and varies due to driving conditions. The PCM assumes a base mileage of 16, 090 km (10, 000 mi) or 1 year for normal driving. However, this number is adjusted down for conditions such as high engine temperature, high engine rpm, use of flex fuel and possibly low engine oil level. The PCM calculates and provides the engine oil life percent message to the IPC. The engine oil change minder can be reset at any time by the driver.
Factory Keycode
The message center can display the original factory keycode when requested.
Factory/Transport Mode
During vehicle build, some modules, such as the IPC and the BCM, are set in factory mode. While in the factory mode the IPC displays FACTORY MODE CONTACT DEALER in the message center. If the vehicle is set in factory mode, the system does not automatically exit the mode and must be manually set to either the transport or normal operation mode.
When the vehicle build is complete, the vehicle is set to transport mode. While in transport mode, the IPC displays TRANSPORT MODE CONTACT DEALER in the message center. Transport mode is used to reduce the drain on the battery during longer periods where the vehicle is not used. Various systems may be altered or are disabled when in the transport mode. The vehicle automatically reverts to normal operation mode after being driven 201 km (125 mi).
To deactivate factory mode, Refer to: Factory Mode Deactivation . . To deactivate transport mode, Refer to: Transport Mode Deactivation .
Four Wheel Drive (Fault and Shifting Instructions)
The message center provides messages to check the 4x4 system, shifting instructions and to provide a system status when a fault condition exists.
Front Camera
The message center provides a message to inform the driver if a front camera malfunction is detected.
Hill Descent Control
The message center provides HDC warnings to inform the driver of the system status and when driver intervention is required.
Lane Keeping System
The message center provides a warning message for the lane keeping alert and system fault messages for the lane keeping system.
Load Shed (12-Volt Battery)
The message center provides load shed messages to inform the driver to use less options to conserve battery voltage.
Memory Seat
The message center displays messages to inform the driver a selected memory position has been saved or the memory recall is not permitted while the vehicle is in motion.
MyKey
The IPC provides a number of MyKey® related warnings and status messages to indicate restrictions imposed on the MyKey® user. These include MyKey® active, park aid, speed limits, and buckle up warnings among others. MyKey® displays are controlled through the IPC software based on the MyKey® settings configured through the center stack display and the type of key in use (MyKey® or administrator key). The MyKey® function also uses other messages received by the IPC for other indications such as vehicle speed for speed limiter displays.
Neutral Tow
The message center provides towing system messages to indicate the status of the neutral tow feature when the neutral tow system is enabled and the vehicle is capable of free-rolling.
Off Road Mode
The message center provides off road informational messages to indicate the status of the off road mode system.
Parking Aid
The IPC provides messages to indicate the status of the parking aid system.
Passive Key And Immobilizer System
The message center provides the starting system fault message to indicate there is a concern with the PATS. The message center provides passive key and immobilizer system messages to indicate the key program is successful, key battery is low, key could not be programmed or failed or maximum number of keys have been programmed. The IPC uses the immobilizer message display messaged input from the BCM to display the applicable message center message.
Pedestrian Alert (HEV)
The message center provides a message to inform the driver of the pedestrian alert status. The pedestrian alert provides an external sound to alert pedestrians of the vehicle's presence when the vehicle is running in electric mode.
Perimeter Alarm
The message center provides the perimeter alarm warning message to indicate the perimeter alarm has been activated and to start the vehicle to stop the alarm.
Power Child Locks
The IPC provides a power child lock warning to inform the driver the child lock feature did not function properly. The power child lock feature is activated through the rear window lockout switch on the driver side master window control switch.
Power Running Boards
The message center provides the power running boards warning messages to inform the driver the status of the power running board feature.
Power Steering
The message center provides a message to indicate there is an EPAS system concern.
Powertrain Cooling
The message center provides a warning message to inform the driver that vehicle performance is reduced to allow the engine to cool. This feature is part of the smart cooling function in the PCM and provides powertrain cooling protection under high ambient temperature conditions.
Rear Seatbelt Monitor
The message center provides a message to indicate the status of the second row seatbelts and if they are buckled.
Remote Start
The message center provides remote start messages to inform the driver the vehicle is in the remote start active state and how to change the state to a drivable state. The remote start message display is active as soon as the vehicle is remote started (the engine is running, but the ignition status is off). Once the driver places the ignition in the RUN state, the IPC carries out its startup sequence.
Reverse Brake Assist
The message center provides a warning message through the rear parking aid or CTA system that an object has been detected to the rear of the vehicle, when travelling at a low speed in reverse gear. The system applies the brakes for a short period of time until the driver takes action to control the vehicle.
Seatbelt
The message center provides a message to indicate the status of the front row seatbelts and if they are buckled.
Side Wind Compensation
The message center provides a message to inform the driver the stability-traction control indication is due to a side wind stabilization event. The side wind compensation feature uses the ABS to compensate for strong side winds that can push the vehicle out of its intended lane, similar to the trailer sway feature.
Sleeper Seat (Max Recline Feature)
The message center provides a message to return the passenger seat to the upright position when the H-point lift sensor in the seat detects the passenger sleeper seat is reclined beyond the set 'normal' recline position while the vehicle is operating. The sensor is hardwired to the DSM.
Snow Plow Mode
The message center provides the snow plow mode active warning to inform the customer the functionality of some electrical features like heated seats and heated steering wheel are restricted due to activation of the snow plow. This feature enables the snow plow to function at full power.
Stability-Traction Control On/Off
The message center provides a stability-traction control system message to indicate the the status of the stability-traction control system or if the system has a fault and requires service.
Starting System
The message center provides starting system messages to inform the driver of the starting system status and when driver intervention is required in order to start the engine.
Steering Wheel Lock
The message center provides messages to inform the driver to turn the steering wheel to enable the release of the steering wheel lock or if a system fault condition is detected.
TPMS (Fault and Tire Training Status)
The IPC provides message center displays to indicate the TPMS sensor training status or a malfunction in the TPMS.
Transmission
The message center provides warning messages to inform the driver about transmission conditions and faults. The IPC uses the operational mode based on the igntion status message and vehicle speed to determine that the vehicle is still in motion and the igntion was switched off.
Trailer Brake and Lighting
The message center provides warning messages to indicate the status of the trailer brake and trailer lamp connections and trailer lamps.
Trailer Sway
The message center provides the trailer sway warning message to inform that a trailer sway has been detected and to reduce speed to help regain control of the trailer.
Vehicle Start Inhibit (Over the Air [OTA] Update)
The message center provides a warning message that vehicle start is inhibited due to an over-the-air software update in progress.
Wait To Start (Diesel)
The message center provides an engine warming wait to start message at key on for diesel engine equipped vehicles. The message displays along with the wait to start RTT indicator.
Component Description
Brake Fluid Level Switch
The brake fluid level switch is mounted in the master cylinder reservoir, and is hardwired to the ABS module through a signal circuit and a separate return circuit. The ABS module provides a reference voltage to the brake fluid level switch. When the brake fluid level is low, the float drops, allowing the switch to close, pulling the reference voltage low. When the brake fluid level is high, the float lifts, opening the switch contacts, sending the reference voltage high on the signal circuit to the ABS module.
Fuel Level Sender
The fuel level sender is mounted to the fuel pump and sender unit or the fuel level sensor. The fuel level sender is a dual sweep potentiometer style resistor connected to a float mechanism. The dual sweep design provides a second resistance measurement that reduces the intermittent loss of data due to corrosion between the resistor wires and the sweep arm. As the fuel level changes, the float rises or falls with the fuel level moving the sweep arm across the resistor wires. This movement either increases or decreases the resistance through the unit. The fuel level sensor resistance ranges from 180 ohms +/- 4 ohms at empty (E) to 10 ohms +/- 2 ohms at full (F). When the fuel level is low, the fuel level sensor resistance is high. When the fuel level is high, the fuel level sensor resistance is low.
Both the fuel pump and sender unit and fuel level sensor are hardwired to the IPC through separate signal and return circuits. The fuel level return circuits are grounded internally in the IPC. The IPC provides a reference voltage on the fuel level signal circuit. As the fuel level changes, the change in resistance raises or lowers the fuel level signal voltage depending on the resistance of the fuel level sender.
Engine Oil Pressure Sensor
The engine oil pressure sensor is hardwired to the PCM through voltage reference (VREF), signal and return circuits. The PCM provides the sensor voltage supply on the VREF circuit and monitors the change in voltage through the signal and return circuits as the engine oil pressure changes.
Steering Wheel Switch - Message Center
The message center switch is part of the RH steering wheel switch and comprised of 5 buttons (up, down, OK, back and menu). The message center switch uses different resistance values associated with each button. The SCCM (without adaptive steering) or SASM (with adaptive steering) sends out a reference voltage to the RH steering wheel switch on the input circuit and monitors the voltage drops. The voltage drop varies depending on the resistance of the specific button pressed, providing indication to the SCCM or SASM which button is pressed.