System Operation: Odometer

xxxxxx.xx km
Roll cnt xx

Displays the current input and the hexadecimal rolling count value for the odometer display.

Fuel % xx
gauge xx
A/D in xx

Displays the hexadecimal fuel level percent, the hexadecimal value for gauge indication and the analog to digital value.

Fuel flow
xxxx

Displays the fuel used during operation as determined by the IPC.

Engine temp
gauge xx
Eng T xxx C

Displays the hexadecimal value of the temperature gauge input value and the temperature display in degrees Celsius.

Battery
xx.x

Displays the current battery voltage as measured on the hot at all times (B+) voltage input.

Dist to empty
xx km

Displays the DTE.

AFE
xxx km

Displays the Average Fuel Economy (AFE).

RAFE
xxx km

Displays the rolling Average Fuel Economy (AFE).

A/D Input xx
xx

Displays the analog to digital inputs.

Port A
xx

Displays the digital port inputs. TestRepeats the test display cycle.

Gateway Function

The IPC acts as a gateway module by receiving information in one format and transmitting it to the audio and multimedia modules using another format. This enables network communication between modules that do not communicate using the same network (Infotainment Controller Area Network (I-CAN) or Medium Speed Controller Area Network (MS-CAN)).

MyKey ®

The MyKey ® feature allows the customer to program a restricted driving mode that is tied to one or more keys known as a MyKey ® key. When a MyKey ® key is in use, the IPC provides the following:

At the beginning of vehicle start up, as part of the welcome strategy, the message center greets the MyKey ® driver with MYKEY ACTIVE DRIVE SAFELY displayed in the message center. If the MyKey ® speed limiter feature is turned on, the message center also displays SPEED LIMITED TO 130 KM/H (80 MPH).
The IPC continuously provides a periodic Belt-Minder ® warning chime until the driver and passenger safety belts are buckled. When the Belt-Minder ® is issued, the ACM is muted and the message center displays BUCKLE UP TO UNMUTE AUDIO. The IPC continuously provides a periodic warning chime until the driver and passenger safety belts are buckled.
If the MyKey ® speed limiter feature is turned on and the vehicle speed approaches 130 km/h (80 mph), the message center displays VEHICLE NEAR TOP SPEED, along with a chime.
If the MyKey ® speed limiter feature is turned on and the vehicle speed reaches 130 km/h (80 mph), the message center displays VEHICLE AT TOP SPEED, along with a chime.
If the speed warning is selected at one of the preset values (75, 90, 105 km/h [45, 55, 65 mph]) and the vehicle approaches the preset speed, the message center displays CHECK SPEED DRIVE SAFELY, along with a chime.
If the traction control always on feature is turned on and the MyKey ® driver attempts to disable the traction control, the message center displays ADVANTRAK CANNOT BE DEACTIVATED.
At 9 L (2.4 gal) tank of remaining fuel, the IPC illuminates the low fuel indicator and the message center displays the appropriate DTE, along with a chime. The low fuel indicator turns off at 15 L (4 gal) of remaining fuel.
MyKey ® miles driven by the MyKey ® user can be found in the information display.
The number of MyKey ® programmed and administrator keys can be found in the information display.

MyKey ® information can be accessed by an administrator key or a MyKey ® key.

When an administrator key is in use, the IPC provides the following:

MyKey ® mileage driven by the MyKey ® user can be found in the information tab of the message center.
The number of MyKey ® programmed keys and administrator keys can be found in the system check function of the message center.

Networked Input Messages and Default States

NOTE: Whenever a network message is suspected as missing and confirmed by a missing message DTC (U-code), it is important to look for other symptoms that can also be present in the IPC and throughout the vehicle. Once a DTC sets in the IPC, it can be helpful to review the complete message list to determine which other modules also rely on the same message and run the self-test for those modules. If the message is missing from other modules, the same DTC can also be set in those modules. Confirmation of missing messages common to multiple modules can indicate that the originating module is the source of the concern or the communication network may be faulted.

The IPC uses input messages from other modules to control the gauges, informational indicators, warning indicators and message center message displays over the communication networks. The majority of messaged inputs to the IPC are received from the BCM. When a network message is required by the IPC from a module on the HS-CAN, the BCM acts as a gateway to convert the message and sends it to the IPC over the MS-CAN. Network messages can drop out or be missing for a variety of reasons, such as high network traffic on the bus. The IPC incorporates a defined strategy for handling missing network messages based on time. The required time for a network message to be missing differs between the various gauges, indicators and message center displays. The strategy is basically the same for all indication but differs in the length of time required for the network message to be missing. If a required network message is missing or invalid for less than the preset time criteria, the gauge, indicator or message center display that requires the network message remains at the last commanded state based upon the last network message received.

For example, if the stability/traction control network message is missing for less than 5 seconds and the stability/traction control indicator (sliding car icon) was on, the indicator remains in the on state until the next network message is received. If the network message remains missing or invalid for more than 5 seconds, the IPC sets a U-code DTC and the IPC output becomes a default action for the indicator or gauge. The indicator may default on/off or the gauge may default to the rest position.

Each indicator or gauge utilizes a different default strategy depending on the nature of the indication. Refer to the diagnostic overview descriptions located before each individual pinpoint test for further description of the default action specific to each indicator or gauge. If the missing messaged input to the IPC returns at any time, the normal function of the gauge, indicator or message center display resumes.

It is very important to understand:

where the input originates.
all the information necessary in order for a feature to operate.
which module(s) receive(s) the input or command message.
which module controls the output of the feature.
whether the module that receives the input controls the output of the feature, or whether it outputs a message over the communication network to another module.

Odometer

The IPC receives the wheel rotation count message from the BCM over the MS-CAN. The BCM receives the wheel rotation count from the ABS module over the HS-CAN. The IPC monitors the wheel count input from the BCM and commands the odometer with a digital display in the message center.