DRIVER POSITION
Note. In order for a new ECC control module to function, the control module must be programmed for the driver position (LHD or RHD).
A control module that has not been programmed will not operate at all and the green indicator LEDs in the REC and AC buttons will flash.
After programming in the driver position, the green LED in the A/C button will flash and continue to do so until the self-adjustment of the damper motor is complete.
Programmable data is: left-hand drive or right-hand drive . If the control module was not previously programmed no data can be read off.
ENGINE TYPE
This programming will enable the ECC control module to adapt the climate control to the actual heating capability of the engine type in the car. Diesel engines take longer to reach operating temperature.
Programmable data is: gasoline or diesel engine . If the control module was not previously programmed no data can be read off.
CABIN FILTER
If the car has a passenger compartment ventilation filter the control module must be programmed with this information. This causes the control module to increase blower fan speeds and the air flow to compensate for the resistance from the filter unit.
If the control module is not programmed for a ventilation filter when there is a filter installed, the air flow will be reduced. This may affect the efficiency of the demisting of the windows. The noise levels from the blower fan will be slightly lower.
However, if the control module is programmed for a passenger compartment ventilation filter and the filter is not installed, this will cause a higher air flow which makes demisting of the windows more efficient, but also results in a slightly higher noise level.
Programmable data is: with or without a passenger compartment ventilation filter. If the control module was not previously programmed no data can be read off.
CABIN TEMP
Adjusting the base settings for the passenger compartment temperature. Used to adjust the passenger compartment (cabin) temperature in relation to settings on the temperature selectors. If the in-car temperature feels too low in relation to the set value, the temperature can be adjusted in relation to the setting on the selectors.
Positive value = Higher temperature in relation to the position of the control knob.
Negative value = Lower temperature in relation to the position of the control knob.
Maximum change, 2.0°C
BLOWER FAN SPD
The cabin blower fan speed (air flow) can be programmed when the blower fan switch is in the AUT position. The air flow can be increased or reduced by a maximum of 8 liters per second from the normal setting.
If the control module is programmed for a lower air flow, this will result in slightly lower noise levels in the car, but also in slightly reduced air circulation. This can make demisting the windows less efficient.
If, however, the control module is programmed for a higher air flow, this will result in slightly higher noise levels in the car. It will also result in increased air circulation which can make demisting the windows more efficient.
Positive value = Increase speed (flow).
Negative value = Lower speed (flow).
Each step is the equivalent of an increase or decrease of the air flow by 4 liters per second
SUNCOMPENSATION
The intensity of the sun affects the temperature in the passenger compartment. In order to maintain a stable climate in the passenger compartment, irrespective of the intensity of the sun, the ECC control module calculates the climate control based on the signal from the sun sensor (which indicates the intensity of the sun). The sensitivity to the sunlight can be programmed. This allows the calculation of temperature settings by the ECC control module to be adapted. This allows for climate control that can be adapted to the wishes of the driver.
The higher the value chosen, the more the control module compensates for the intensity of the sun. However, if the compensation is set too high, draughts may be felt in the passenger compartment when the blower fan speed increases.
The lower the setting chosen, the less the control module compensates for the intensity of the sunlight. If the setting selected is too low, the passenger compartment may become too warm when the intensity of the sunlight is high.
The sensitivity can be set to 7 different stages from -4 to +2.
Note. The function is not available on all climate control modules (dependent on the P/N).
SPEED SIGNAL
Note. In order for the new ECC control module to function correctly, the speed signal must be programmed.
From and including production week 832, the ECC control module has been updated with a new function for the programming of the speed signal from the combined instrument panel. This is because the functionality of the combined instrument panel has been changed.
Previously the combined instrument panel had two output signals; a 12 pulsed and a 48 pulsed signal. The ECC control module was connected to the 48 pulse signal. The new combined instrument panel will only have a 12 pulsed speed signal. Therefore the ECC control module is connected to the 12 pulsed signal.
The new ECC control modules replace the older versions and can be installed in both new and older cars. To obtain the correct functionality, the new ECC control module must be programmed for the correct type of speed signal. The new combined instrument panel has the text "Max" instead of a digit at the maximum fuel level in the fuel gauge.
On older combined instrument panels the ECC control module must be programmed for 48 pulses .
On new combined instrument panels the ECC control module must be programmed for 12 pulses .
Note. The function is not available on all climate control modules (dependent on the P/N).
Parameter read off, ECC
Note. Certain values can differ from values in Signal specification ECC , which is because the values as follows are often calculated and filtered by the control module. In addition in certain cases the control module displays substitute values when a diagnostic trouble code (DTC).
Note. With the air distribution selector in the AUTO position the control module controls some functions, which can be seen by checking certain parameters. For this reason do not use the AUTO position, select another position.
| No. | TEXT Units of measurement | Remarks |
|---|---|---|
| 1 | D+= OFF/ON | Generator (GEN) voltage D+, status OFF=Generator not charging ON= Generator charging |
| 2 | FAN SELECT= AUTO/0/ON/MAX | Blower fan switch, position AUTO= AUTO selected 0= Position 0 selected ON= Fan on MAX= Fan at maximum speed |
| 3 | SELECT= DEFR/FL-DEFR/FLOOR/BI-LEVEL/VENT/AUTO | Air distribution selector, position Note! Several positions on the selector can have the same description |
| 4 | LTEMP KNOB= MAX/27-17°C (80.6-62.6°F)/MIN/ERR | Left temperature selector, position ERR= Shows there is a fault on the passenger compartment temperature selector signal. |
| 5 | RTEMP KNOB= MAX/27-17°C (80.6-62.6°F)/MIN/ERR | Right temperature selector, position ERR= Shows there is a fault on the passenger compartment temperature selector signal. |
| 6 | REC= OFF/ON/NOT ACT | Recirculation switches, status OFF= REC-OFF depressed ON= REC-ON depressed NOT ACT= No buttons depressed |
| 7 | AC= OFF/ON/NOT ACT | Damper Motor Position Sensor recirculation, position OFF= A/C-OFF pressed in ON=A/C-ON pressed in NOT ACT= No buttons depressed |
| 8 | REC SHUTT= % | Damper Motor Position Sensor air distribution, position Measurement range: 0-100% 0%= DEF position 100%= FLOOR position The blower fan must be operating, or the engine must be idling in order for the control module to active the damper motor when the selector is turned. |
| 9 | MODE SHUTT= % | Voltage generator (GEN) D+, status Measurement range: 0-200% 0%= Position DEF 100%= Position FLOOR 200%= Position VENT VLJ= The blower fan must be operating, or the engine must be idling in order for the control module to active the damper motor when the selector is turned. |
| 10 | DTEMP SHUTT= % | Position sensor temperature damper motor driver, position Measurement range: 0-100% 0%= Minimum temperature 100%= Maximum temperature The blower fan must be operating, or the engine must be idling in order for the control module to active the damper motor when the selector is turned. |
| 11 | PTEMP SHUTT= % | Position sensor temperature damper motor passenger, position Measurement range: 0-100% 0%= Minimum temperature 100%= Maximum temperature The blower fan must be operating, or the engine must be idling in order for the control module to active the damper motor when the selector is turned. |
| 12 | SUN INTEN= W/m2 | Sun intensity, value Sun intensity calculated on the basis of the solar sensor signal. |
| 13 | CAB TEMP= °C (°F) | Passenger compartment temperature, value Temperature based on passenger compartment temperature sensor signal. |
| 14 | ECT= °C (°F) | Engine coolant temperature (ECT) The control module derives temperature from engine control module's (ECM) signal. |
| 15 | AMB.TEMP= =°C (°F) | Outside temperature, value Derived temperature based on signal from outside temperature sensor signal. |
| 16 | TID= XXHXXM | Time since ignition ON. Shows hours and minutes. |
| 17 | SPEED= km/h (mph) | Vehicle speed, value Calculated speed based on signal from combined instrument panel |
| 18 | CAB TEMP FAN= OFF/ON | Fan passenger compartment temperature sensor, status OFF= Fan off ON= Fan on The fan is mounted in the passenger compartment temperature sensor. |
| 19 | FAN UNIT= OK/NOT OK/ERR | Communication with blower fan power unit, status OK= Communication OK NOT OK= Communication not OK, a diagnostic trouble code (DTC) may be stored ERR= The blower fan control module has registered a fault in the fan and a diagnostic trouble code (DTC) may be stored. |
| 20 | BLOWER= % | Control module control of blower fan, value Measurement range 0 - 100%. The value indicates how much the control module wishes the fan to be activated, the signal goes to the power module which regulates the blower fan motor to the control module requirements. The higher the value the higher the speed required by the control module. |
Component resistance values
The resistance values stated below are at +20°C unless otherwise indicated.
| Component | Remarks |
|---|---|
| Outside temperature sensor | Resistance: 4 °C: approximately 1.2 kohms 20 °C: approximately 500 ohms |
| Coolant temperature sensor | Resistance: 10 °C: approximately 20 kohms 20 °C: approximately 11 kohms 30°C: approximately 8 kohms 75 °C: approximately 1.5 kohms 90 °C: approximately 900 ohms |
| Combustion fan | Resistance in the winding between terminals: 1-10 ohms |
| Water pump | Resistance in the winding between terminals: 1-10 ohms |
| Fuel pump (FP) | Resistance in the winding between terminals: approximately 8 ohms |
| Glow plug | Resistance: approximately 1 ohms |
| Overheat protection thermostat | Resistance: Not tripped < 3 ohms Tripped 10 kohms |