Table of Contents E70 Climate Control Workbook Subject Page Climate Control System .4 IHKA .5 IHKA with FKA.6 IHKA with FKA Rear Automatic Air Conditioning System (4-zone).6 Air Distribution Adjustment.7 Automatic Programs (Gentle, Medium, Intensive).7 Rain/Light Solar Sensor.7 IHKA with FKA and 3rd Row Heating A/entilation .9 Heating/Ventilation forThird Row of Seats .9 System Circuit Diagram- IHKA 2-zone.12 System Circuit Diagram- IHKA FKA, 4-zone.14 Actuator Motors Locations .16 Initial Print Date: 12/06 Revision Date: Table of Contents Subject Page C limate C ontrol Workbook Model: E70 Production: From Start of Production ■BIECIIMB After completion of this module you will be able to: • Demonstrate the function and operation of IHKA and IHKA w/FKA systems. • Identify and locate the different components in the IHKA and IHKA w FKA systems. E70 Climate Control Workbook 3 4 E70 Climate Control Workbook Climate Control System The E70 X5 climate control system has been extensively enhanced and re designed compared with that of the E53 X5.The overall performance of the system was increased with respect to cooling and heating output.The E70's Climate Control system is designed as a water based temperature control and has Four Temperature Zone capability, depending on equipment variant. There are three equipment options available for U.S. vehicles: • IHKA, integrated automatic heating / air conditioning system (2-zone) • IHKA with FKA rear automatic air conditioning system (4-zone) • Optional 3rd row heating and ventilation system on the 5+2 seat package IHKA allows the temperature and the air flaps at the left and right sides of the vehicle to be controlled separately for the driver and the front passenger. The vehicle interior is controlled in two zones (2-zone) in accordance with these individual settings. FKA is the rear automatic air conditioning system and has its own operating and control module in the rear. This control module is used to operate individual heating/air conditioning adjusting facili¬ ties for the rear passengers. The optionally available FKA gives the rear passengers the oppor¬ tunity to make separate temperature settings for the left and right sides of the vehicle and control the blower in the rear. The vehicle interior is controlled in four zones (4- zone) in accordance with these four individual settings. Stand-alone heating and ventilation system forthe third row of seats is also available forthe optional 5+2 seat package. Heating is realized with the use of a PTC electrical heater and ventilation through the use of a blowerfan located inside the 3rd row heating and ventilation unit. Note: In efforts to reduce C02 emissions, all E70 vehicles will be fitted with A/C compressors with magnetic clutches. Vehicles with the N62 engine will initially be equipped with clutchless A/C compressors, but in later production will come with magnetic clutches. IHKA IHKA has ten actuator motors in total with four separate motors for airflap control. Fresh air or recirculated air can be routed directly to the air ducts via the evaporator and appropriate bypass, without being routed through the system's heater core. The airflow (fresh air or recircu¬ lated air) is first routed via the evaporator in the heating/ air-condi¬ tioning housing, provided that the A/C compressor has been acti¬ vated, cooled and then heated to the required temperature via the heating system. Due to its dual section heater core, the IHKA allows separate and individual 2- zone, right/left temperature control. This is achieved in part, through the use of left and right temperature sensors. The desired temperature is fine tuned via two water control valves (left/right). The water flow through the heater core is aided with the use of an auxiliary water pump in the case of vehicles with the N62 engine (the N52 engine has an electric water pump thus no auxil¬ iary pump is needed) Index Explanation Index Explanation 1 IHKA, 2-zone 6 Ventilation air outlet, front center, left/right 2 IHKA controls module, temperature setting fortwo zones 7 Ventilation air outlet, front left/right 3 Two inlet pipes to HWT, 5two water valves 8 Footwell air outlet, front left/right 4 Fresh air intake 9 Footwell air ducts, rear left/right 5 Defrost air outlet 10 Ventilation air outlet, rear left/right E70 Climate Control Workbook 5 6 E70 Climate Control Workbook IHKA with FKA ! 'e in. | * . . w LX • _S-l Index Explanation Index Explanation 1 IHKA with rear automatic air conditioning system, 4-zone. 7 Defrost air outlet 2 IHKA, dual front temperature controls 8 Ventilation air outlet, front left/right 3 FKA, dual rear temperature controls 9 Ventilation air outlet, front left/right 4 Two inlet pipes to heater core, two water valves 10 Footwell air outlet, front left/right 5 PTC heating element in footwell air ducts rear left/right 11 Rear ventilation air outlet, center, left/right 6 Rear blower (FKA) 12 Ventilation air outlet, B-pillar left/right IHKA with FKA Rear Automatic AirConditioning System (4-zone) The 4-zone air conditioning system consists of the standard 2-zone IHKA plus: • Its own FKA controls • Four additional outlet temperature sensors • A separate rear blower • Air ducts and outlets in the B-pillars • Two separate PTC heating elements in the rearfootwell air ducts • Three additional actuator motors for air flap control of the system (IHKA with FKA, total of thirteen actuator motors) The Climate Control Menu allows us to activate orde-activate the FKA rear climate control via the controller. A checked box next to "Activate Rear Climate Control" function will show the system acti¬ vated. The FKA control settings can be taken over by selecting the "Use Driver Settings” function that synchronizes FKA settings with the driver-side IHKA system settings. However, as soon as the FKA controls are operated by the rear occupants the rear controls become active once again. < 9t Rear Climate Control ► | uy Activate rear climate control Main Street □ Use driver's settings W~ 100m BAVERN3 TMC a 'Ti.ul 8:52 10:10 52 km Air Distribution Adjustment When the rocker button forthe vent selection is operated, an "Air distribution" pop-up menu appears on the control display. The air distribution may be tailored to preference The air stratification (ventilation temperature) can also be adjusted via the controller in this menu at the same time as the air distribu¬ tion is being adjusted. Air Distribution / Ventilation « 9t Vent Settings ► Driver r* Automatic Programs (Gentle, Medium, Intensive) The IHKA control module can be used to select and adjust the automatic program using the AUTO button as a rocker button or via the controller. The three different automatic programs: • Gentle • Medium • Intensive Each have their own characteristic curves for blower control, air dis¬ tribution and airflap control. This enables the occupant to select between three different IHKA programs that achieve the requested climate change at different levels of performance in automatic mode without having to switch to manual mode. Automatic Programs < it Automatic programs ► □ soft • □ medium = f CV intensive Rain/Light Solar Sensor The new rain/light solar sensor RLSS of the E70 is clipped into a retaining ring beneath the windshield mirror base cover. The rain/light solar sensor separately records the insolation acting upon the vehicle occupants forthe left and right halves of the vehicle. It generates two signals that are proportional to the insolation act¬ ing upon the vehicle occupants.The sensorsignal is read by the FZD via the LIN bus and relayed to the IHKA via the K-CAN. Index Explanation 1 Front window mirror base 2 RLSS rain/driving light solar sensor 3 BSS mist sensor E70 Climate Control Workbook 7 8 E70 Climate Control Workbook Workshop Exercise - Heating AirConditioning Systems E70 Operate the 4-zone Heating and Air Conditioning System (IHKA High with FKA). Which two operations activate the AUTO program? How can the residual heat function be activated? Name the three modes of the AUTO program? Which prerequisites are needed to activate the rest feature? What do these modes signify? How can the FKA be shut off? Which settings can be set individually forthe 4- zone heating/air conditioning system? Please check the correct answer(s). □ Temperature □ Blower speed □ Air stratification □ Air distribution IHKA with FKA and 3rd Row Heating /Ventilation Index Explanation Index Explanation 1 IHKA FKA, 4-zone 5 Controls for heating and venti¬ lation for 3rd row seats, HB3SR 2 IH KA control module, dual front temperature controls. 6 Heating and ventilation 3rd row of seats (blower, PTC heating element, adjusting flap for air distribution) 3 FKA control module, dual rear temperature controls. 7 Vehicle interior ventilation 4 Two inlet pipes to heater core, two water valves Heating/Ventilation forThird Row of Seats The optional 3rd row heating/ventilation blower is activated using a button located on the 3rd row center air outlet vent between the third row seats. The air distribution of the auxiliary unit can be selected up forthe center air vent and down forthe footwell (floor) air vents using a knurled wheel with control flap. A PTC heating element in the air duct is activated by a micro¬ switch when the DOWN limit stop of the air outlet knurled wheel is reached. •The heated airflows out the footwell vents of the 3rd row area. •The heating function can only be activated with the blower switched on. •The air volume cannot be controlled. Index Explanation Index Explanation 1 Controls forthe 3rd row heating and ventilating system 3 Knurled wheel for air distribution flap with end stop switch to acti¬ vate the PTC heating element 2 Blowerfor3rd row of seats ON/OFF button 4 Heating and ventilating control module E70 Climate Control Workbook 9 10 E70 Climate Control Workbook The control module for heating and ventilating the 3rd row of seats is connected to the IHKA via the LIN bus and controls the electrical heating element (output 300W) Index Explanation Index Explanation 1 Housing for heating and ventilating the 3rd row of seats 4 Air distribution flap knurled adjusting wheel 2 Blower ON/OFF button 5 Airduct 3 Limit position switch for knurled adjusting wheel to turn ON/OFF the PTC heating element 6 Lower warm air routing flap Index Explanation Index Explanation 1 Air delivery unit of the 3rd row heating and ventilation system 4 Auxiliary heating temperature sensor 2 Ventilation blower and recirculated air intake 5 HB3SR control module 3 PTC heating element The output of the heating element is controlled depending on inte¬ rior temperature in three stages from 0 - 100% (<20°C = 100%, > 20°C =50%, >30°C =0% PTC output). The DM E (ECM) (by means of a CAN signal to the IHKA and to the HB3SR control module via the LIN bus) can reduce the power of the heating element (power reduction of 50% or cut off) within the scope of power management. Workshop Exercise - Heating Air Conditioning Systems E70 Operate and observe the Heating and Ventilation 3rd Seat Row (HB3SR). What terminal is required to enable the heating function of the Heating Ventilation 3rd Seat Row (HB3SR)? □ KL 0 □ KL R □ KL 15 engine OFF □ KL 15 engine On Can heat be distributed to the face vent? Why? What terminal is required to enable the blower of the Heating Ventilation 3rd Seat Row (HB3SR)? □ KL 0 □ KL R □ KL 15 engine OFF □ KL 15 engine On Measure the temperature atfootwell outlets. Heater OFF °F °C Heater ON (after 2 minutes) °F °C E70 Climate Control Workbook 11 12 E70 Climate Control Workbook System Circuit Diagram- IHKA 2-zone 13 System C ircuit Diagram Legend for IHKA and IHKA w/FKA 14 E70 Climate Control Workbook System Circuit Diagram- IHKA FKA, 4-zone 15 System Circuit Diagram Legend for IHKA and IHKA w/FKA 16 E70 Climate Control Workbook Actuator Motors Locations Legend Actuator motors IHKA IHKA with FKA 1 Fresh air/recirculated air, actuator motor V V 2 Dynamic pressure compensation, actuator motor V V 3 Defrost, actuator motor V V 4 Left/right front ventilation, actuator motor V V 5 Right/left front footwell, actuator motor V V 6 Right/left front air stratification, actuator motor V V 7 Right front ventilation, actuator motor V V 8 Left front footwell, actuator motor V V 9 Right front air stratification, actuator motor V V 10 Left/right rear air stratification, actuator motor V V 11 Left rear footwell, actuator motor Not used V 12 Right rearfootwell, actuator motor Not used V 13 Right rear air stratification/s hut-off, actuator motor Not used V E70 Climate Control Workbook 17 18 E70 Climate Control Workbook Workshop Exercise - E70 Heating AirConditioning Systems Locate the following components at the vehicle and complete the table below. Component Mounting Location Condenser Dryer Compressor Water valves Expansion valve Evacuation & Service Port Pressure sensor M icro filter AUC sensor Solarsensor Condensation sensor Access the fresh air carbon activated filter. Access the recirculation air particle filter. □ Classroom Exercise - Review Questions As a Co2 emission reduction measure, a.will be installed with all engine options available on E70. Check the best possible answer. Clutch-less compressor □ Reduction Converter □ Electromagnetic Clutch □ Harmonic Balancer 2. Select the componentthatturns on the RearHeating and Ventilation PTC heater element. Check the best possible answer. 6 , 5 J 3 How many blower units are there in a fully equipped E70? (Including FKA and HB3SR) Check the best possible answer. □ Four □ Two □ One □ Three 4. What is the purpose forthe heating elements in the FKA? Check the best possible answer. □ Defrost function □ Enhance rear heating □ Windshield de-icing □ Parked car heating/ventilation E70 Climate Control Workbook 19