Function

Function

Text messages




There is a display for text messages etc in the center of the tachometer in the driver information module (DIM) (5/1). This provides the driver with supplementary information about the various warning symbols. This is to reduces the number of different symbols in the combined instrument panel. Other types of messages, such as the functions of the trip computer, are also displayed. Depending on the circumstances, a request for these messages may come from the central electronic module (CEM) (4/56) or the steering wheel module (SWM) (3/130).
There is an order of priority where all warning messages have precedence.

Outside temperature




The outside temperature gauge is integrated in the display in the tachometer. This function displays the outside temperature. If there is a risk of icy road conditions, a snow flake symbol is displayed to warn the driver. A snowflake is displayed between -5 to +2 °C.
A sensor which detects the outside temperature is mounted in the left-hand door mirror (6/62). The temperature sensor is directly connected to the engine control module (ECM) (4/46) which then forwards the signal to the driver information module (DIM) (5/1). The temperature is displayed in Celsius or Fahrenheit, depending on the market, in increments of one degree. The unit for temperature display is a programmable customer parameter.
To obtain display of reliable temperature, the temperature changes are shown with a certain delay. This since the temperature sensor is affected by, for example, the engine's temperature, when the vehicle has been parked for a time with warm engine, as it would give a too high value in such a case. The delay is dependent on vehicle speed and is different depending on if the temperature is increasing or decreasing.

If vehicle speed is above 2 km/h:
- a displayed temperature value can decrease by 0.25 °C per 0.5 seconds
- a displayed temperature value can increase by 0.25 °C per 8 seconds.

If vehicle speed is below 2 km/h:
- a displayed temperature value can decrease by 0.25 °C per 0.5 seconds
- a displayed temperature value can increase by 0.25 °C per 60 seconds.
As a result of this delay, under certain special conditions it may take several minutes before the current temperature is shown correctly in the display.
Displayed temperature value is always rounded off to the nearest lower whole number.

Clock




The only function of the clock is to display the time in hours and minutes. The clock is integrated in the display in the tachometer.
Information is transmitted from the central electronic module (CEM) (4/56) to the driver information module (DIM) (5/1) via the controller area network (CAN).
The customer can adjust the time using a knob at the bottom of the driver information module (DIM). During adjustment, the driver information module (DIM) transmits the new time to the central electronic module (CEM). The central electronic module (CEM) registers the change and updates its clock accordingly.
The customer can select the way in which the time is displayed:
- 12 hour clock. The time is automatically displayed with AM or PM
- 24 hours clock.

Seat belt reminder




The seat belt reminder reminds the driver to put on the seat belt. There are three versions of the seat belt reminder:
- European
- American
- other countries.
The difference between the two is described below. The signals which indicate the variant (European, American or other) are transmitted by the central electronic module (CEM) (4/56) via the control area network (CAN).
If the seat belt is not fastened, this is indicated to the driver, partly by two small symbols lighting up by the roof lamp. Partly by a sound from and a symbol lighting in the driver information module (DIM) (5/1).
European version (applies to S80/V70/XC70)
All the seats in the vehicle are monitored.
If the driver's seatbelt and/or front passenger seatbelt are not buckled when the ignition is turned on, the symbols will light up. An audible signal will also be heard from the Driver information module (DIM)when the vehicle speed is above 10 km/h. The audible signal's frequency is increased at speeds over 25 km/h, and at speeds over 40 km/h the volume is also increased.
The audible signal can be turned off by buckling the seatbelt or selecting reverse.
When the highest volume of the audible signal has started, over 40 km/h, and the speed is then reduced to below 40 km/h, the highest volume will remain for 90 seconds. After these 90 seconds, the audible signal returns to becoming speed-dependent if the vehicle is driven with a speed below 40 km/h.
For the backseat there is status monitoring that generates various text messages depending on which belts are buckled. These messages are turned off 30 seconds after the vehicle has reached a speed above 10 km/h.
If a backseat belt is unbuckled a warning message is lit on the Driver information module (DIM) and in the overhead console, and an audible signal will be heard if speed is above 10 km/h.
Sound and light signals follow the same pattern as for the front seat.
Sound, light signals, and text messages can be removed with the Read-button on the steering wheel stalk.
If any rear door is closed, a message is lit in the Driver information module (DIM). The message can be turned off with the Read-button on the stalk.
European version (applies to XC60)
All the seats in the vehicle are monitored.
If the driver's seatbelt and/or front passenger seatbelt are not buckled when the ignition is turned on, the symbols will light up. An audible signal will also be heard from the Driver information module (DIM)when the vehicle speed is above 10 km/h. The audible signal's frequency is increased at speeds over 25 km/h, and at speeds over 40 km/h the volume is also increased.
The audible signal can be turned off by buckling the seatbelt or selecting reverse.
At speeds over 25 km/h but under 40 km/h, unbuckled persons are reminded for 5 seconds, with the highest volume of audible signal, to buckle the seatbelt. Then the audible signal returns to being speed-dependent.
When the highest volume of the audible signal has started, over 40 km/h, and the speed is then reduced to below 40 km/h, the highest volume will remain for 90 seconds. After these 90 seconds, the audible signal returns to becoming speed-dependent if the vehicle is driven with a speed below 40 km/h.
For the backseat there is status monitoring that generates various text messages depending on which belts are buckled. These messages are turned off 30 seconds after the vehicle has reached a speed above 10 km/h.
If a backseat belt is unbuckled a warning message is lit on the Driver information module (DIM) and in the overhead console, and an audible signal will be heard if speed is above 10 km/h.
Sound and light signals follow the same pattern as for the front seat.
Sound, light signals, and text messages can be removed with the Read-button on the steering wheel stalk.
If any rear door is closed, a message is lit in the Driver information module (DIM). The message can be turned off with the Read-button on the stalk.
American version
Monitoring only occurs for the seat belt on the driver's seat in the vehicle.
When the ignition is switched on, the symbols light continuously for 6 seconds, or until the driver's seat belt is fastened. At the same time there will be a audible signal from the driver information module (DIM) for the same period of time. If the driver then undoes the seat belt, the audible signal will not resume if more than 6 seconds have passed since the ignition was switched on.
Other version
The front seats in the vehicle are monitored.
The symbol will light if the belt is not fastened when the ignition is switched on. There is an audible signal from the driver information module (DIM) when the vehicle speed exceeds 10 km/h. This continues for 6 seconds until either the seat belt is fastened or reverse gear is selected or the audible signal is switched off using the Read button on the control stalk. The audible signal's frequency increases at speeds exceeding 25 km/h and at speeds exceeding 40 km/h the volume also increases.

Trip odometer / odometer




The function of the trip odometers and the odometer is to display the three available odometer modes. The two settings are the total mileage of the car and the mileage since the two trip odometers were last set to zero. The trip odometers can be reset individually. The odometer and one of the two trip odometers are always displayed. Press the button briefly to switch between the two trip odometers. Hold the button in longer to reset the trip odometer. The driver information module (DIM) must also be powered.
The central electronic module (CEM)(4/56) receives a speed signal from the brake control module (BCM) (4/16) which is transmitted on the high speed section of the control area network (CAN). The central electronic module (CEM) then transmits the signal on to the driver information module (DIM) (5/1) via the low speed section of the control area network (CAN). The distance traveled is saved every fourth kilometer and the value is stored in the central electronic module (CEM).

Service message




In order to give the car owner greater possibility of having maintenance service done at the right time, the driver is informed when it is time to book a time for maintenance service. The service message is shown before the actual conditions for the service interval are fulfilled, to avoid exceeding the service interval.

The service message is shown as a text message in the Driver information module (DIM) in the following steps:
1. Book time for service
The text message "Book time for service" is shown when any of the following conditions is fulfilled:
- 1,250 km (777 miles) before distance condition for service interval.
- 1 month before time condition for service interval.
- 100 hours before engine time condition for service interval.
1. time for service
The text message "Time for service" is shown when any of the conditions for service interval is fulfilled. The service interval is dependent on model, engine, and market, and thus it varies.
An example of condition for a service interval may be:
- Distance condition - 15,000 km.
- Time condition - 12 months.
- Engine time condition - 750 hours.
1. Time for service exceeded
The text message "Time for service exceeded" is shown when any or several of the conditions for service interval are fulfilled, and any of the following conditions is fulfilled:
- 1,250 km (777 miles) after distance condition for service interval.
- 1 month after time condition for service interval.
- 100 hours after engine time condition for service interval.
The service message continues to be shown every time the ignition is turned on, until maintenance service is done and the service message has been erased.

The conditions for showing the service message can be programmed according to three different parameters:
- Distance condition - Driving distance.
- Time condition - Number of months since last service.
- Engine time condition- Number of hours engine has been running.
The engine oil's quality also has an impact on when the service message is shown. However, this parameter cannot be programmed.

Note! The service message may vary depending on market and/or language.

Resetting the service message
The service message can be reset using the diagnostic tool or as follows:
- Set the vehicle to ignition position I.
- Press and hold in the reset button for the trip meter.
- Ignition position II.
- Wait 10 seconds.
- Release the reset button when the information light starts to flash.

Engine coolant temperature (ECT)




The engine control module (ECM), (4/46) processes the value it receives from the engine coolant temperature (ECT) sensor. The processed value is then transmitted to the central electronic module (CEM) (4/56) on the high speed section of the control area network (CAN). The central electronic module (CEM) receives the signal and generates a corresponding signal on the low speed section of the control area network (CAN). The driver information module (DIM) (5/1) reads the signal from the low speed section of the control area network (CAN).
The driver receives information via a text message and a warning lamp if the temperature becomes too high.

Parking brake




The sensor for the parking brake is directly connected to the central electronic module (CEM). A signal which indicates whether the parking brake is applied or not is transmitted from the sensor to the central electronic module (CEM) (4/56). The central electronic module (CEM) sends the signal on to the driver information module (DIM) (5/1) via the controller area network (CAN). When the parking brake is applied (activated) the lamp lights.
The driver information module (DIM) can be programmed so that the driver is also warned by an audible signal that the parking brake is activated.
For further information about the electric parking brake, see Design and Function, parking brake module (PBM).

SRS warning lamp




The supplementary restraint system (SRS) (4/9) contacts the driver information module (DIM) (5/1) if there is a problem in the system. A signal is transmitted via the control area network (CAN) and the driver information module (DIM) lights the SRS lamp and displays a text message. The driver information module (DIM) also informs the supplemental restraint system module (SRS) whether the indicator lamp is working or not. A text message is displayed and the red warning lamp lights if the SRS warning lamp is not working.

Brake warning lamp




The brake control module (BCM) (4/16) informs the driver information module (DIM) (5/1) if there is a fault in the brake system. The driver information module (DIM) informs the driver by lighting warning lamps and also displaying a text message. The signal is transmitted from the brake control module (BCM) (4/56) to the central electronic module (CEM) on the high speed section of the control area network (CAN). The central electronic module (CEM) transmits the signal onwards on the low speed section of the controller area network (CAN) to the driver information module (DIM).
The brake fluid level sensor detects the level of the brake fluid in the reservoir. The switch in the sensor closes again when the level is low. A signal is then transmitted from the brake control module (BCM), via the central electronic module (CEM), to the driver information module (DIM), which lights the red warning lamp and the brake warning lamp. The driver information module (DIM) also displays a text message.

Fuel gauge




There is sensor in the fuel tank, in some cases two. These transmit signals about the actual fuel level to the central electronic module (CEM) (4/56). The central electronic module (CEM) sends the signals on to the driver information module (DIM) (5/1). The driver information module (DIM) receives the signals, interprets them and displays the actual fuel level in the fuel gauge.
The low fuel level warning lamp lights when the fuel level is low. The warning lamp informs the driver that the fuel level is low.
The warning lamp lights when there are less than 9 liters of gasoline or 7.5 liters diesel, depending on the engine type, in the tank.
The fuel gauge is not sensitive to rapid change. This is to prevent incorrect values being displayed when cornering or driving on slopes for example.

Speedometer




The speedometer displays the actual speed the car is traveling at.
Information about speed comes from the speed sensor which is connected to the brake control module (BCM) (4/16) and the transmission control module (TCM) (4/28). The brake control module (BCM) and the transmission control module (TCM) calculate an average speed based on the signals sent from the two front wheels by the speed sensors. The calculated speed signals are then sent to the central electronic module (CEM) (4/56) from the brake control module (BCM) and the transmission control module (TCM) on the high speed section of the controller area network (CAN). Depending on the quality of the signal, the central electronic module (CEM) uses the signal from the brake control module (BCM) or the transmission control module (TCM). The central electronic module (CEM) then sends this information on to the driver information module (DIM) (5/1) which displays the speed.
Transmission control modules (TCM) are only installed in cars with automatic transmissions. In cars with manual transmissions, the speed signal is sent to the central electronic module (CEM) only by the brake control module (BCM).

Tachometer




A flywheel sensor is connected to the engine control module (ECM) (4/46). The engine control module (ECM) transmits the engine speed on the high speed section of the control area network (CAN). The central electronic module (CEM) (4/56) receives the signal and generates a corresponding signal on the low speed section of the control area network (CAN). The driver information module (DIM) (5/1) reads the signal and displays the engine speed for the driver.

Oil pressure level indication/warning (only applies to versions with oil pressure sensors)




The oil pressure sensor is connected to the engine control module (ECM) (4/46). The engine control module (ECM) transmits the oil pressure signal onwards via the high speed section of the control area network (CAN). The central electronic module (CEM) (4/56) receives the signal and generates a corresponding signal on the low speed section of the control area network (CAN). The driver information module (DIM) (5/1) receives the signal. If the oil pressure is low, the driver information module (DIM) lights a red warning lamp and displays a message to warn the driver.
For information about whether the vehicle is equipped with an oil pressure or oil level sensor, see Design and Function, Engine control module (ECM).
If the vehicle does not have an oil dipstick, the oil level is displayed in the trip computer in the Driver information module (DIM). These vehicles have an indicator that shows the actual oil level. From the indicator you can read out whether the vehicle has a high, low or correct oil level.
To calculate the vehicle's oil level, the engine must be switched off. Note, however, that the warning lamp and message in the Driver information module (DIM) is still shown when travelling if the oil pressure is too low.

General red warning lamp




This function displays different "faults" in the car. When a lamp lights this is followed by a text message that presents the driver with additional information about why the lamp has lit. The red warning lamp lights in the event of serious faults that affect driveability.

Yellow information lamp




This function displays information. When a lamp lights this is followed by a text message which presents the driver with additional information about why the lamp has lit. The yellow information lamp lights when there is information of a less serious nature.

Malfunction indicator lamp (MIL).




The malfunction indicator lamp (MIL) only lights in the driver information module (DIM) (5/1) if certain specific emissions related diagnostic trouble codes (DTCs) are stored in the engine control module (ECM) (4/46) or transmission control module (TCM) (4/28).
The engine control module (ECM), respectively, transmission control module (TCM) transmits the signal to the central electronic module (CEM) (4/56) via the controller area network (CAN) and the central electronic module (CEM) transmits it on to the driver information module (DIM) that lights the lamp.