Adaption of Climatronic control unit -J255

Adaption channel 01

Basic setting ex  factory 000

Temperature increase after start of auxiliary heating/ventilation mode.

This function is in display and operating units fitted at start of production

Not yet active (introduction pending).

- At basic setting 0 the specified temperature in auxiliary heating/ventilation mode is set equal to the specified temperature in air conditioner mode.

- By way of the adaptation function the specified temperature can be increased in 0.5 °C increments by up to 4.0 °C (input value 1...8).

 

Adaption channel 02

Basic setting ex  factory 000

Temperature increase at end of preset auxiliary heating/ventilation period.

This function is in display and operating units fitted at start of production

Not yet active (introduction pending).

- At basic setting 0, the specified temperature in auxiliary heater/ventilation mode is set to the same level as the specified temperature in air conditioning mode.

- By way of the adaption function the specified temperature can be increased in 0.5 °C increments by up to 2.0 °C (input value 1...4).

 

Adaption channel 03

Basic setting ex  factory 001

Compressor shut-off by engine control unit via AC compressor shut-off function.

- At basic setting 1 activation of the AC compressor regulating valve -N280 is disabled as soon as the request is received from the engine control unit.

- By way of the adaption function shut-off of activation of the AC compressor regulating valve -N280 based on AC compressor cut-in can be suppressed by changing the adaption to 0. (The -J255 ignores the request.)

 

Adaption channel 04

Basic setting ex  factory 000

Motor/AC transmission ratio (dependent on compressor motor variant). The assignment to the respective engine is transmitted over the convenience system data bus.

- Adaption cannot be altered

 

Adaption channel 05

Basic setting ex  factory 001

Expanded AC readiness.

- Adaption cannot be altered

 

Adaption channel 06

Basic setting ex  factory 000

Decision-making aid, auxiliary heating/ventilation.

- At setting 0 (basic setting) the -J255 decides (at ignition on, by way of the measured actual and preset specification temperatures), whether the auxiliary heater is started or whether the system operates in auxiliary ventilation mode.

- At setting 1 (last function) the -J255 always requests the last set mode regardless of the measured and preset temperatures.

 

Adaption channel 07

Basic setting ex  factory 000

Shut-off response, auxiliary heating/ventilation.

- At setting 0 (basic setting) the auxiliary heating/ventilation mode is maintained until the preset operating time has elapsed or is switched off manually.

- At setting 1 the auxiliary heating/ventilation is switched off when the engine is switched off.

 

Adaption channel 08

Basic setting ex  factory 000

Reduction of fresh air blower speed with voice recognition. This function is not yet active with Climatronic control units fitted at start of production (introduction pending).

- At setting 0 the fresh air blower speed is not reduced.

- At setting 1...X the fresh air blower speed is reduced by the preset value.

 

Adaption channel 09

Basic setting ex  factory 000

Currently not used (or no readout).

 

Adaption channel 10

Basic setting ex  factory 010

Limitation of air temperature control after evaporator.

- At setting 10 the -J255 can regulate the output of the air conditioner (dependent on the setting) from a temperature as low as 10 °C.

- At setting 05...09 the upper control limit for the temperature of the air downstream of the evaporator is fixed to the preset value (e.g. 05 corresponding to 5°C).

 

Adaption channel 11

Basic setting ex  factory 001

Shut off solar function.

- At setting 1 the line for solar roof operating mode is displayed on the MMI. Operation of the fresh air blower via the solar roof can be switched on and off.

- At setting 0 the line for solar roof operating mode is not displayed on the MMI. If a solar roof is fitted, it cannot be switched off.

 

Adaption channel 12

Basic setting ex  factory 001

Currently not used (or no readout).

 

Adaption channel 13

Basic setting ex  factory 001

Currently not used (or no readout).

 

Adaption channel 14

Basic setting ex  factory 001

Currently not used (or no readout).

 

Adaption channel 15

Basic setting ex  factory 060

Fresh air blower speed in auxiliary heating/ventilation mode.

- At setting 60 the -J255 regulates the maximum voltage at the fresh air blower -V2 e.g. to 6V.

- At setting 30...80 the fresh air blower speed is regulated to the preset value (45 corresponding to 4.5 V for example). Basic setting ex factory: 70 or 60.

 

Adaption channel 16

Basic setting ex  factory 000

Activation of auxiliary heater in residual heat function.

- At setting 0 the -J255 does not activate the auxiliary heater on activating the residual heat function.

- At setting 1 the -J255 activates the auxiliary heater on activation of the residual heat function if additional heat energy is required to achieve or maintain the set temperature.

 

Adaption channel 17

Display depends on part number.

Currently not used

 

Adaption channel 18

Basic setting ex  factory 000

Deactivation of electrical consumers when requested by energy management control unit

-J644.

- At setting 0 the request is implemented.

- At setting 1 the request is not implemented. But the power output for the consumers concerned is limited by the -J255 to 600 W.

 

Adaption channel 19

Basic setting ex  factory 000

Activation of fuel-powered additional heater (auxiliary heater) on vehicles with diesel engine.

- At setting 0 the additional heater is activated by the J255 if additional heat energy is required to achieve or maintain the set temperature.

- At setting 1 the -J255 does not activate the additional heater in Econ mode (setting on MMI).

 

Adaption channel 20

Basic setting ex  factory 000

Deactivation of rear seat heating (only vehicles with rear Climatronic control unit

-E265). This function is not yet active on control and display units fitted at start of production (phase-in from December 2002).

- At setting 0 the rear seat heating (left and right) is automatically deactivated about 10 minutes after switch-on.

- At setting 1 the seat heating is not switched off automatically.

 

Adaption channel 21

Basic setting ex  factory 000

Deactivation of engine preheating function in auxiliary heater mode. This function is not yet active with Climatronic control units fitted at start of production (introduction pending).

- At setting 0 the line for engine preheating mode is not displayed on the MMI. (The engine is only preheated when surplus heat is available from the auxiliary heater.)

- At setting 1 the line for engine preheating mode is displayed on the MMI. (The engine is preheated if this mode is set.) This setting is not implemented on all vehicles (dependent on the MMI variant). The adaption of the auxiliary/additional heater should be changed in line with the customer’s wishes where appropriate.

 

Adaption channel 22

Basic setting ex  factory 000

Adaption of fresh air blower characteristic (phase-in from December 2002).

- At setting 0 the fresh air blower runs at the speed assigned to that coding.

- At setting 1 the fresh air blower runs at a somewhat lower speed across the full characteristic line.

- At setting 2 the fresh air blower runs at a somewhat higher speed across the full characteristic line. )Corresponds to the characteristic stored for the USA coding.)

 

Adaption channel 23

Basic setting ex  factory 000

Adaption of temperature characteristic (phase-in from December 2002).

- At setting 0 the -J255 regulates the temperature to the values assigned to that coding.

- At setting 1 the temperature in Winter is regulated to a somewhat warmer temperature characteristic.

- At setting 2 the temperature in Summer is regulated to a somewhat warmer temperature characteristic. )Corresponds to the characteristic stored for the USA coding.)

 

Adaption channel 24

Basic setting ex  factory 000

Currently not used

- Intended for reduction of air flow to windscreen after starting (adaption 1, introduction pending).

 

Adaption channel 25

Basic setting ex  factory 000

Currently not used

- Intended for setting to increase air flow to footwell in cooling mode (adaption 1, introduction pending).

 

Adaption channel 26

Basic setting ex  factory 000

Currently not used

- On with vehicles with rear Climatronic control unit -E265, intended to increase the fresh air blower speed accordingly for more rapid attainment of the specified temperature following alteration of the specified temperature (adaption 1, introduction pending).

 

Adaption channel 81

Basic setting ex  factory 000

Currently not used

The chassis number must  be deleted via the component protection function after replacing the Climatronic control unit -J255.