MCC
The motor is connected to MCC unit pins 15 (K42) and 14 (K42). The output polarity is reversed in order to change motor rotation direction. The MCC unit applies a B+ feed on pin 15 and grounds pin 14 in order to operate the motor for fresh air setting and conversely in order to operate the motor for cabin air retrieval.
Connection, motor/MCC unit for LHD car: MCC unit pin 15 towards motor pin 5 MCC unit pin 14 towards motor pin 6
Scheme 449
Connection, motor/MCC unit for RHD car: MCC unit pin 15 towards motor pin 6 MCC unit pin 14 towards motor pin 5 Illustration interface
To quickly electrically heat the seat when starting in cold temperatures.
Scheme 450
The heating pad consists of two circuits, one circuit is the heating element and the other circuit provides information about the temperature in question. The temperature sensor consists of a NTC resistor whose resistance varies with the temperature of the heating pad.
If the heating pad is connected to the ACC unit
Heating element
Relay 511R is fed with +15 from fuse 16 in the rear electrical center. The circuit continues through the seat and backrest cushion and is ground at grounding point G34P.
The relay is connected to pin 24 (K32) on the ACC control module, when pin 24 is ground the relay makes and the heating circuit is activated.
Scheme 451
Wiring diagram, Back and seat heating pad
Scheme 452
Wiring diagram, Heating pad temperature sensor.
Scheme 453
Temperature sensor circuit
The sensor (254) is ground internally in the ACC unit via pin 31 (K32) and the sensor is fed from pin 21 (K32) with 5V via an integrated 10 kOhm resistor in the ACC unit. The NTC resistor characteristics mean the at the resistance drops as the temperature rises. This means that the voltage measured across the resistor will at the same time drop with a rising temperature.
The voltage level from the A/D sensor is converted and is then available in digital form. The digital voltage level is then converted to a temperature value which is stored in the ACC unit operating memory. Voltage levels near 0 V or 5 V are determined as circuit faults.
If the heating pad is connected to the MCC
Heating element
Relay 511FL is fed with +15 from fuse 16 in the rear electrical center. The circuit continues through the seat and backrest cushion and is ground at grounding point G34P.
The relay is connected to pin 3 on the MCC control module, when pin 3 is ground the relay makes and the heating circuit is activated.
Temperature sensor circuit
The sensor (254) is ground internally in the MCC unit via pin 9 and the sensor is fed from pin 15 with 5V via an integrated 10 kOhm resistor in the ACC unit. The NTC resistor characteristics mean the at the resistance drops as the temperature rises. This means that the voltage measured across the resistor will at the same time drop with a rising temperature.
The voltage level from the A/D sensor is converted and is then available in digital form. The digital voltage level is then converted to a temperature value which is stored in the ACC unit operating memory. Voltage levels near 0 V or 5 V are determined as circuit faults.
To quickly electrically heat the seat when starting in cold temperatures.
The heating pad consists of two circuits, one circuit is the heating element and the other circuit provides information about the temperature in question. The temperature sensor consists of a NTC resistor whose resistance varies with the temperature of the heating pad.
If the heating pad is connected to the ACC unit
Heating element
Relay 511FL is fed with +15 from fuse 15 in the rear electrical center. The circuit continues through the seat and backrest cushion and is ground at grounding point G33P.
Wiring diagram, Back and seat heating pad
Scheme 454
Scheme 455
Wiring diagram, Heating pad temperature sensor.
Scheme 456
The relay is connected to pin 8 (K32) on the ACC control module, when pin 8 is ground the relay makes and the heating circuit is activated.
Temperature sensor circuit
The sensor (254) is ground internally in the ACC unit via pin 31 (K32) and the sensor is fed from pin 23 (K32) with 5V via an integrated 10 kOhm resistor in the ACC unit. The NTC resistor characteristics mean the at the resistance drops as the temperature rises. This means that the voltage measured across the resistor will at the same time drop with a rising temperature.
The voltage level from the A/D sensor is converted and is then available in digital form. The digital voltage level is then converted to a temperature value which is stored in the ACC unit operating memory. Voltage levels near 0 V or 5 V are determined as circuit faults.
If the heating pad is connected to the MCC
Heating element
Relay 511FL is fed with +15 from fuse 15 in the rear electrical center. The circuit continues through the seat and backrest cushion and is ground at grounding point G33P.
The relay is connected to pin 2 on the MCC control module, when pin 2 is ground the relay makes and the heating circuit is activated.
Temperature sensor circuit
The sensor (254) is grounded internally in the MCC unit via pin 9 and the sensor is fed from pin 21 with 5V via a 10 kOhm resistor integrated in the MCC unit. The NTC resistor characteristics mean the that the resistance drops as the temperature rises. This means that the voltage measured across the resistor will at the same time drop with a rising temperature.
The voltage level from the A/D sensor is converted and is then available in digital form. The digital voltage level is then converted to a temperature value which is stored in the ACC unit operating memory. Voltage levels near 0 V or 5 V are determined as circuit faults.
The control unit controls ventilation fan motor speed with input from the MCC unit.
Scheme 457
The control unit contains electronics which receive and process the MCC unit's control signal regarding fan speed. The control unit grounds the ventilation fan motor and controls fan speed by increasing or decreasing the power supply.
Scheme 458
The control unit has one connector which is connected to the MCC unit and two separate outputs for ventilation fan motor power supply and ground.
Four pin connector.
Control unit B+ feed to pin 1 from fuse 23 (fuse board 22) and ground connection through pin 3 on grounding point G41.
From MCC unit pin 27, fan speed is controlled by control unit pin 2 with 0-5 volts.
The ventilation fan motor is connected with 2 separate inputs from the control unit.
The fan motor is connected to ground on pin 2 through the fan motor control unit on grounding point G41.
The fan motor receives current on pin 1 and the speed is controlled by the control unit through an increase or decrease of the power supply.
Wiring diagram, control signal.
Scheme 459
Wiring diagram, power supply.
Scheme 460
The motor is connected by linkage and controls the floor, panel and defroster distribution damper.
The DC motor has a fixed position sensor (potentiometer) which provides information regarding damper position.
Scheme 461
DC motor
The motor is connected to MCC unit pins 29 and 31. The output polarity is reversed in order to change the motor rotation direction.
Scheme 462
Scheme 463
Potentiometer
The position sensor consists of a potentiometer with a 5 V power supply from MCC pin 28 to potentiometer pin 3 and which is connected to ground via pin 1 from MCC unit pin 8. Potentiometer pin 2 supplies a voltage for MCC pin 20 between 0-5 volts which represents the motor position.
The motor is connected by linkage which controls the air mixing damper.
The DC motor has a fixed position sensor (potentiometer) which provides information regarding damper position.
Scheme 464
DC motor
The motor is connected to MCC unit pins 13 and 16. The output polarity is reversed in order to change the motor rotation direction.
Scheme 465
Scheme 466
Potentiometer
The position sensor consists of a potentiometer with a 5 V feed from MCC pin 12 to potentiometer pin 1 and which is connected to ground via pin 3 from MCC unit pin 7.
Potentiometer pin 2 supplies a voltage for MCC pin 6 between 0-5 volts which represents the motor position.
The control panel processor receives information from the heating/air distribution knob potentiometers, calculates and ensures that the DC motors for heating/air distribution positions correspond to the selections made by the user.
