Faulty Signal
Faulty signal
Checking function passenger compartment temperature selector
- Ignition on.
- Read off the current passenger compartment temperature selector position.
Turn blower fan switch slowly between limit positions several times and check that all the values shown are correct in relation to the position indicated on the control panel text section.
Is temperature selector switch OK?
Yes - Intermittent fault
No - Reading off data and replacing components
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Reading off data and replacing components
Note! Before replacing a control module, the programmed data must be read off first if this is possible.
- Ignition on.
- Use Programming function to read out all data from ECC control module and note down the values. These values must be used to program the new control module. For further information about programming, see Description of ECC programmed data Programming The ECC Control Module.
Then try a new ECC control module according to Replacing ECC control module Removal and Replacement.
Continue - Programming data
Programming the ECC control module
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Programming the ECC control module
Programming the ECC control module
General information about programming
Note! Before replacing a control module all programmed data must be read out first if this is possible. This is so that the new control module can be programmed with the same data. Check all the variable parameters for the new climate control module.
The ECC control module can be programmed with certain information. The purpose of the programming is to adjust the control module to the car version or when the requests of the driver for certain adjustments to the settings.
For more information about the values, see Description of ECC programmed data Programming The ECC Control Module.
- Set the blower fan speed selector switch to AUTO.
Programming procedure
Select the desired setting from the list box and then press Continue to program the different settings and to receive more information about the different alternatives.
Other procedures:
1. Begin the programming procedure. Make one setting at a time. Work from the top of the list box to the bottom
2. Read off all programmed alternatives
3. Exit without programming.
Select an alternative.
1 - Programming driver position (LHD or RHD)
2 - Reading off the programmed values
3 - DONE
Numeric Result 0 - Programming driver position (LHD or RHD)
Numeric Result 1 - Programming the engine type
Numeric Result 2 - Programming the passenger compartment ventilation filter
Numeric Result 3 - Programming the passenger compartment temperature
Numeric Result 4 - Programming the blower fan speed
Numeric Result 5 - Selection of control module sensor version when programming the sun sensor
Numeric Result 6 - Selection of control module sensor version when programming the speed signal
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Reading off the programmed values
- Ignition on
- Use the Programming function to read off the programmed values.
For more information about the values, see Description of ECC programmed data Programming The ECC Control Module.
Continue - General information about programming
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Programming driver position (LHD or RHD)
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 with 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.
- Ignition on
- Use the Programming function to read out and program the ECC control module. Programmable data is: left-hand drive or right-hand drive . If the control module was not previously programmed no data can be read off.
Read off the driver position. Note the value. If the programming is not correct, program in the correct version.
Any further programming to be carried out?
Yes - Programming the engine type
No - Information
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Programming the engine type
Note! 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.
- Ignition on
- Use the Programming function to read off and program the ECC control module. Programmable data is: gasoline or diesel engine . If the control module was not previously programmed no data can be read off.
Read off the engine type. Make a note of the value. If the programming is not correct, program in the correct version.
Any further programming to be carried out?
Yes - Programming the passenger compartment ventilation filter
No - Information
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Programming the passenger compartment ventilation filter
Note! 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 interior of the windows. However 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.
- Take off the cover panel over the blower fan air intake to determine if the car has a passenger compartment ventilation filter installed
- Ignition on
- Use the Programming function to read off and program the ECC control module. 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.
Read off if a passenger compartment ventilation filter is programmed. Make a note of the value. If the programming is not correct, program in the correct version.
Any further programming to be carried out?
Yes - Programming the passenger compartment temperature
No - Information
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Programming the passenger compartment temperature
Note! The relation between the temperature in the passenger compartment and the temperature setting on the selector knob can be reprogrammed. The passenger compartment temperature can be increased or reduced by a maximum of 2°C from the normal setting. This allows some account to be taken of the driver's wishes regarding the temperature settings in the car.
- Ignition on
- Use the Programming function to read off and program the ECC control module. Programmable temperature is: between ±2°C in steps of 0.5°C .
Make a note of the programmed passenger compartment temperature. Program as necessary.
Any further programming to be carried out?
Yes - Programming the blower fan speed
No - Information
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Programming the blower fan speed
Note! 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.
- Ignition on
- Use the Programming function to read off and program the ECC control module. Programmable blower fan speed is: between ±8 l/s in steps of 4 l/s .
Make a note of the programmed blower fan speed. Program as necessary.
Any further programming to be carried out?
Yes - Selection of control module sensor version when programming the sun sensor
No - Information
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Selection of control module sensor version when programming the sun sensor
Note! The sensitivity of the sun sensor cannot be programmed on certain older control module variants. The P/N of the control module must be read off to identify the control module version.
- Ignition on
- Read off the P/N of the ECC control module. Compare it with the P/N below.
The sensitivity of the sun sensor cannot be programmed on the following control modules (P/N):
- 9134783
- 9134784
- 9171404
- 9171405
- 9171551
- 9171552.
Is the control module P/N different from the above list?
Yes - Programming the sensitivity of the sun sensor
No - Information
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Programming the sensitivity of the sun sensor
Note! 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 sunlight). 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 sensitivity can be set in 7 stages from -4 to +2. 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 slightly. 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.
Note! The setting should only be changed if it is definitely the sun compensation that the customer is dissatisfied with.
- Ignition on
- Use the Programming function to read off and program the ECC control module. Programmable compensation is: between -4 and +2 in steps of 1 .
Make a note of the programmed sun sensor value. Program as necessary.
Any further programming to be carried out?
Yes - Selection of control module sensor version when programming the speed signal
No - Information
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Selection of control module sensor version when programming the speed signal
Note! The speed signal cannot be programmed on certain older control module variants. The P/N of the control module must be read off to identify the control module version.
- Ignition on
- Read off the P/N of the ECC control module. Compare it with the P/N below.
The type of speed signal cannot be programmed on the following control modules (P/N):
- 9134783
- 9134784
- 9171404
- 9171405
- 9171551
- 9171552
- 9171594
- 9171595
- 9459455
- 9459456.
Is the control module P/N different from the above list?
Yes - Programming the speed signal, ECC
No - Information
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Programming the speed signal, ECC
Note! In order for the new ECC control module to function correctly, the speed signal must be programmed. From production week 832 inclusive, 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.
- Ignition on
- Use the Programming function to read off and program the ECC control module.
Make a note of the current programming. Program the correct version.
Select "Continue" when the programming is complete.
Continue - Information
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Information
Is there any further programming or reading off to be carried out?
Yes - General information about programming
No - FAULT FOUND
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FAULT FOUND - Self-adjusting of shutter motor end position
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Self-adjusting of shutter motor end position
Self-adjustment of the shutter motor end position
Self-adjustment of the damper motor limit positions, ECC
Note! Self-adjustment must be carried out if the control module or damper motor is replaced or the damper motor or its linkage has been removed. A new control module will cause the green indicator LED on the air conditioning (A/C) switch to flash until self-adjustment has been carried out. The green LED on the air conditioning (A/C) switch will flash until the self-adjustment of a new control module has been carried out.
Hint: During self-adjustment the control module runs the damper motors to their limit positions. The control module then stores the value returned from the position sensor for the damper motor. The control module is then able to operate the motor between the limit positions during normal operation.
- Start the engine (the generator charges)
- Use the Adjusting Motors function to activate self-adjusting on the damper motors. This takes approximately thirty seconds.
When self-adjusting is complete the green indicator LED will stop flashing.
Select one of the following options:
1. Exit self-adjustment
2. Read data about problems during self-adjustment.
1 - FAULT FOUND
2 - Checking causes of no self-adjustment
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Checking causes of no self-adjustment
Checking causes of no self-adjustment
Checking causes of no self-adjustment
Check and/or remedy the following if damper motor self-adjustment is interrupted or is not possible.
Start the engine (the generator (GEN) charges). Climate control unit (ECC) terminal #B3 receives a signal from the generator indicating that there is charging. This is to supply the damper motors with maximum power supply during adjustment. If the signal is missing, the adjustment is not permitted to start. Read off the "Generator D+" parameter. Check that the signal is being transmitted.
Switch off the engine. Start the engine again. If self-adjustment has been carried out in the current ignition cycle, the control module will not perform a new self-adjustment until the ignition has been switch off and the engine re-started. Try to perform self-adjustment again.
Read off the diagnostic trouble codes (DTCs). Carry out any fault-tracing according to the instructions.
Check that the control module power supply (terminal #B5) and power ground (terminal #A23) is OK.
Check that the position sensor circuit is OK for both the temperature damper motors.
Check the signals to control module terminals #A7, #A13 and #A22 for the right temperature damper motor.
Check the signals to control module terminals #A7, #A12 and #A22 for the left temperature damper motor.
Check that the damper, linkage, cam discs, damper motors etc are correctly installed and can move freely and smoothly to the limit positions. Check the damper motor shaft and its mounting in the damper spindle in particular for damage and cracks etc.
Other information:
- For information about signals, see Signal specification ECC Signal Specification ECC
- To connect the breakout box, see Connection of breakout box ECC Connection of Breakout Box ECC.
Do you want to try self-adjustment again?
Yes - Attempt New Test
No - DONE
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Attempt New Test - Self-adjustment of the damper motor limit positions, ECC
DONE - FAULT FOUND
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FAULT FOUND - Verification
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Programming data
Note! The new control module must be programmed using the data read off from the old control module. If the new ECC control module is to function correctly it has to be programmed with the driver position. Before the control module is programmed the green LEDs in the REC and A/C buttons will flash.
- Ignition on.
- Set the blower fan speed selector switch to AUTO.
- Use Programming function to program the ECC control module. For further information about programming, see Programming the ECC control module.
- After programming in the driver position the green LED in the A/C button will flash and continue to do so until the automatic damper motor adjustment is completed. Press "Continue" to carry out automatic self-adjustment.
Continue - Self-adjusting of shutter motor end position
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Self-adjusting of shutter motor end position
Activate function Self-adjustment of the shutter motor end position.
Continue - Verification
DONE
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Verification
Hint: After carrying out the repair, check that the fault has been remedied.
- Ignition off.
- Reinstall connectors, components etc.
- Ignition on.
- Read off the current passenger compartment temperature selector position.
Turn blower fan switch slowly between limit positions several times and check that all the values shown are correct in relation to the position indicated on the control panel text section.
Is temperature selector switch OK?
Yes - FAULT FOUND
No - Fault-tracing information
No Fault Found
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Fault-tracing information
Information
Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.
Do you want to exit fault-tracing?
Yes - Exit fault-tracing
No - Attempt New Test
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Attempt New Test - Checking function passenger compartment temperature selector
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Intermittent fault
Fault-tracing indicates that the ECC control module registered a fault previously on the temperature selector switch but the fault is now no longer present.
Continue - Fault-tracing information
DONE
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Fault-tracing information
Information
Fault-tracing information
If the fault is intermittent, do not verify fault-tracing if the fault does not recur.
It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).
Do you want to view the information again?
Yes - Attempt New Test
No - FAULT FOUND
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Attempt New Test - Checking function passenger compartment temperature selector
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