E46 Board Monitor & Navigation Service Mode Displays
The Mark II system provides a service mode display function. These screens provide system hardware/software identification numbers and status of Board Monitor and Navigation specific functions for use as a diagnostic tool. The screens are accessed as follows:
- From the Main Menu select "Set".
- Once in the Set function, press and hold the menu button for 8 seconds.
- The next screen to appear is the SERVICE MODE menu.
The first accessible function is "On-board monitor". Pressing this selection calls up the version screen which provides identification of hardware/software specific index versions for the installed system.
Pressing the functions key at the bottom continues into additional screens including the Key Functions and Brightness controls.
Key Functions tests the key input on the BMBT. Input status (1-25) will display in the window.
If no keys are pressed the status will be displayed as "FF".
Rotating the left or right rotary knob displays hex code input status.
Rotated slowly, the display changes with each increment.
The display eventually stops at "1F" in the left rotated direction and "E0" to the right.
The key function test terminates automatically if no keys or knobs are moved after a short duration ("00").
The next accessible function is the NAVI/GRAPHIC ELEMENT.
This screen identifies hardware/software specific index versions for the installed system.
The Video module selection is not functional since the US version Mark II nav system does not utilize the video module.
The next available selection from the service mode menu is "GPS".
This display provides the GPS receiver module hardware version number and date of programmed software.
Pressing the functions button in the lower right corner of this screen provides a sub-selection menu.
GPS Status provides information on the exact coordinates of the vehicle based on the calculations of the GPS receiver module.
GPS Tracking provides information about the individual satellites currently sending signals to the GPS
The next selection available from the SERVICE MODE menu is "Sensor check" which provides:
- Wheel speed input (only one wheel speed signal, displayed).
- Number of satellites detected.
- What mode the GPS receiver module is currently in; (i.e.: Search)
- The Gyro status provides the millivoltage value the Nav computer is utilizing for the current vehicle position. This area also includes an icon representing what direction the vehicle is heading in.
- The direction status indicates what gear is selected (forward or reverse).
The Sensor check display is intended to be used while test driving the vehicle. Use the legend below to compare with the display status.
| STATUS DISPLAY | WHAT SHOULD BE DISPLAYED | WHAT TO DO IF NOT OK |
|---|---|---|
| Wheel Sensors: | As the vehicle is driven, the number should increase with an increase in vehicle speed. | Check fault codes in ASC/DSC system. If necessary carry out wheel speed sensor test. |
| GPS Satellites: | With unobstructed upward view of sky the display should be more than 3 | Check for interference of signals to GPS antenna, Check integrity of circuit from GPS receiver module and Nav computer |
| GPS Status: | See GPS STATUS TEXT DISPLAY AND DESCRIPTION . | |
| Gyro: | Direction icon moves with vehicle turning movement. Milli voltage display value should be approx 2500 mV (+/- 400mV) when the vehicle is stationary or driven straight ahead. When the vehicle is turning, the value must rise or fall which indicates the gyro sensor is detecting yaw. |
Replace Navigation computer. |
| Direction: | Reverse is displayed when range selector is in reverse. Forward in any other range. | Check back up light signal input |
| GPS Status Text Display | Description |
|---|---|
| 1. "GPS fault" | Problem with GPS system. Swap GPS receiver module and or antenna from know good vehicle after checking GPS status display information described on page 153. |
| 2. "Reception Interference" | Problem with GPS system. Same as above. |
| 3. "No Almanac" | No Data yet stored from satellites. The GPS almanac is a memory account of received satellite signals. If the vehicle battery has been disconnected or after replacing a GPS receiver module it has an empty memory and requires satellite signals to become functional. After the receiver module receives battery voltage and ground, it must be left outside with an unobstructed sky above with the ignition switched to KL R for approximatly 15 minutes. |
| 4. "Satellite search" | GPS is currently searching for satellite signals. |
| 5. "Satellite contact" | At least one satellite is found |
| 6. "Position known" | Vehicle's Latitude and Longitude known. Navigation is possible. |
The last selection available is the Telematics entry display. This replaces the "VIN" selection from the E38/E39 Mark II systems. The only requirement of this entry screen is that the VIN is entered at the VPC when prepped prior to distribution.
This is necessary for the Emergency program if needed when calling the Cross Country Group Roadside Assistance Program.
Additionally, if the vehicle is equipped with a Phase V phone the system will automatically utilize the entered VIN as per E38/E39 Mark II systems.
The VIN is entered at the VPC for all vehicles (with or without a Phase V phone). If the VIN has been incorrectly entered it can be changed by turning and pressing the rotary knob when the correct letter or digit of the last seven character of the VIN is displayed.
The balance of the data displayed below the VIN entry is not currently used in the US market.