Climate Units - Design and Function: Other Volvo V40 I рестайлинг

Air Conditioning System

See Air conditioning system

Air Mixing Openings

See Air mixing openings

Rotary controls and switches

See Rotary controls and switches

After fault-tracing/repairs

When all connectors have been reconnected and all components reinstalled

1. Ignition off.
2. reconnect the battery negative terminal
3. ignition on.

Scheme 261

The control module has a built-in diagnostic system, the Volvo on-board diagnostic (OBD) system. This system continuously monitors itself and the input and output signals.

Reading off input and output signals

Using this function, the values and status of the control module input and output signals can be continuously read off.

Reading off the programmed values

This function can be used to read off programmed data and to program data into the control module. The purpose of the programming is to adapt the control module to the car version or when the driver requests that certain adjustments are made to the settings.

Note. Before replacing a control module all programmed data must be read off first if this is possible. The information will then be entered into the new control module after it has been installed.

Driver position

Indicates the driver's position to automatically start the driver's seat heating when the outside temperature is below 0°C (32°F).

Seat temperature

Indicates which temperature the right and left seats should retain at high and low level seat heating. Off if the car is not equipped with seat heating.

Timer heated rear window and door mirrors

Indicates if the heated rear window will be deactivated after engagement for 12 minutes.

Scheme 262

This service initiates self-adjustment of the climate unit damper motors.

Note. For self-adjustment of the damper motors the engine must be running at idle (generator (GEN) charging).

Read off and erase the status of the low current protection

With this option the low current protection status can be read off and erased.

The control module uses the low current protection to interrupt or shut off the additional heater while running if the control module registers that the power supply is too low.

Using this function, the values and status of the control module input and output signals can be continuously read off.

The following parameters can be read off

1. battery voltage, value
2. outside temperature, value
3. coolant temperature, value
4. additional heater, status
5. ignition supply, status
6. generator (GEN) voltage D+, status
7. the status displays whether or not the control module has registered that the power supply is too low
8. fuel pump (FP), status
9. glow plug, status
10. water pump, status
11. combustion fan, value
12. timer, status
13. run time, value.

Scheme 263

With this function the components and functions in the additional heater system can be activated.

The following components can be activated

1. the additional heater
2. the water pump
3. the combustion fan
4. the glow plug.

Note. The engine must be running in order for the additional heater to operate. When the heater is functioning as a parking heater, the heater is activated using the start/stop button on the timer when the ignition is on. The heater control unit on certain cars does not have a +15 power supply. This means that individual components and functions cannot be activated.

Reading off and programming data

With this option it is possible to read programmed data and program in data. The aim with this programming is set up the additional heater function according to the customer's requirement.

Note. If possible, read off all data from the control module before replacing the control module. After replacement, the current data must be programmed into the new control module.

The programmable data is the start temperature setting. Start temperature refers to the highest outside temperature at which the additional heater may start.