Transfer Case Assembly: Overview Kia Sportage II

Scheme 1

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Scheme 3

1. Normal driving situation: 2WD base driving
2. 4WD driving in driving situations (rapid activation, cornering etc.)
3. Input the information from each sensor in vehicle Input torque (Throttle position sensor) Cornering situation (Steering angle sensor) Vehicle speed and different wheel speed front & rear (Wheel speed sensor) Braking situation (Brake signal and ABS signal)
4. Distributed the required driving force after 4WD ECU operates.
5. EMC (Electric Magnetic Clutch) operates the primary clutch.
6. Control the cam's opening gap by operation of primary clutch.
7. Control the slip of inner & outer plate. Control variably the driving force distribution to optimize front & rear driving force.

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Scheme 7

1. NON-ABS controller
2. ABS/TCS controller
3. ESP controller

Scheme 8

1. Based on a driver request for lock mode, the system will supply a fixed torque to the ITM-I clutch.
2. When the vehicle exceeds 30KPH the system will begin to disable lock mode by ramping down the ITM clutch torque. When the vehicle exceeds 40 KPH the ITM clutch is reduced to its minimum torque value. Lock mode is re-enabled following the same speed-to-torque map.
3. Lock mode is activated based on part number.
4. Lock mode will override all other system requests except for during an ABS event. During an ABS event the ITM clutch is turned off.
5. If there is a speed sensor signal fault, the speeds are no longer considered reliable and lock mode will be disabled.

GENERAL DESCRIPTION

Steering wheel sensor which is contactless and analog type measures the absolute pressure by using the "MR" effect, you must execute initialization by using SCAN TOOL after installing new or reinstalling old steering wheel angle sensor. This signal which is a angle velocity of steering wheel is made use of sensing the rotating direction & neutrality of steering wheel. In case ESP system is applied to the vehicle steering angle sensor signal is sent to 4WD-ECM(TCCU) by CAN communication.

Scheme 9

DTC DESCRIPTION

This failure code is related to the TCCU communication line of the ESP application system and is set if input signal to TCCU is in "Loss of signal out of range".

Steering wheel sensor which is contactless and analog type measures the absolute pressure by using the "MR" effect, you must execute initialization by using SCAN TOOL after installing new or reinstalling old steering wheel angle sensor. This signal which is a angle velocity of steering wheel is made use of sensing the rotating direction & neutrality of steering wheel. In case ESP system is applied to the vehicle steering angle sensor signal is sent to 4WD-ECM(TCCU) by CAN communication.

Scheme 10

This failure code is related to the steering angle sensor #1 and is set if input signal to TCCU is in "Loss of signal out of range".

This failure code is related to the TCCU communication line of the ESP(ABS CONTROL MODULE) application system and is set if input signal to TCCU is in "Loss of signal out of range".

Steering angle sensor is a hole plate between the photo-controller LED and the photo transistor. As the hole plate rotates during steering wheel rotation, an electrical signal will be generated depending on whether the LED light passes through the plate to the photo-transistor or not.

This signal which is a angle velocity of steering wheel is made use of sensing the rotating direction & neutrality of steering wheel. In case ABS(ESP) system is applied to the vehicle steering angle sensor signal is sent to 4WD-ECM(TCCU) by CAN communication.

Scheme 11

This failure code is related to the Steering angle sensor #2 and is set if input signal to TCCU is "Loss of signal out of range".

This failure code is related to the TCCU communication line of the ESP(ABS CONTROL MODULE) application system and is set if input signal to TCCU is in "Loss of signal out of range".

Refer to DTC P1718 STEERING WHEEL ANGLE SENSOR 2-INPUT SIGNAL

This failure code is related to the Steering angle sensor N and is set if input signal to TCCU is "Loss of signal out of range". This failure code is related to the TCCU communication line of the ESP(ABS CONTROL MODULE) application system and is set if input signal to TCCU is in "Loss of signal out of range".

The TPS signal is transmitted to the 4WD ECU via CAN communication with the engine ECU. This signal is used as one of the criteria for determining the amount of torque distribution between the front and rear wheel.

Scheme 12

This DTC code is related to TPS and is set If there is no input signal to TCCU or the signal is out of specified range.

4WD ECM(TCCU) uses voltage to control EMC (Electric Magnet Clutch). EMC distributes suitable toque with slippage of multi-plate clutch.

Scheme 13

This DTC code is related to the EMC and is set If EMS harness has an open or short to battery source.

Refer to DTC P1729 EMC SHORTED TO GROUND

Refer to DTC P1729 EMC SHORTED TO GROUND

The TPS signal is transmitted to the 4WD ECU via CAN communication with the engine ECU. This signal is used as one of the criteria for determining the amount of torque distribution between the front and rear wheel.

Scheme 14

This failure code is set if CAN BUS ERROR that means wrong TCCU installation is continued for more than 1sec.

Wheel speed sensor is active hall-sensor type. Frequency of duty wave is changed in proportion to rotation of tone wheel and HECU calculate vehicle speed by this frequency.

In case ABS(or ESP) system is applied to the vehicle, wheel speed sensor signal is sent to 4WD-ECM(TCCU) by CAN communication.

Scheme 15

This failure code is related to the TCCU communication line of the ESP(ABS CONTROL MODULE) and is set if there is no input signal to TCCU.

When the tone wheel rotates, adjacent to the sensor pole component, an alternating current signal is generated in the coil with a frequency proportional to the wheel speed.

Wheel Speed Sensor generates a signal which is sent to TCCU.

Scheme 16

Refer to DTC P1750A WHEEL SPEED SENSOR SIGNAL(FL)-WITH ABS

Refer to DTC P1750A WHEEL SPEED SENSOR SIGNAL(FL)-WITH ABS

Refer to DTC P1750A WHEEL SPEED SENSOR SIGNAL(FL)-WITH ABS

Refer to DTC P1750B WHEEL SPEED SENSOR SIGNAL(FL)-WITHOUT ABS

Refer to DTC P1750B WHEEL SPEED SENSOR SIGNAL(FL)-WITHOUT ABS

Refer to DTC P1750A WHEEL SPEED SENSOR SIGNAL(FL)-WITH ABS

Refer to DTC P1750A WHEEL SPEED SENSOR SIGNAL(FL)-WITH ABS

Refer to DTC P1750B WHEEL SPEED SENSOR SIGNAL(FL)-WITHOUT ABS

Refer to DTC P1750B WHEEL SPEED SENSOR SIGNAL(FL)-WITHOUT ABS

Refer to DTC P1750A WHEEL SPEED SENSOR SIGNAL(FL)-WITH ABS

Refer to DTC P1750A WHEEL SPEED SENSOR SIGNAL(FL)-WITH ABS

Refer to DTC P1750B WHEEL SPEED SENSOR SIGNAL(FL)-WITHOUT ABS

Refer to DTC P1750B WHEEL SPEED SENSOR SIGNAL(FL)-WITHOUT ABS

CAN communication is fitted to permit the exchange of multiple signals between electronic control units through the use of two common data lines.

Scheme 17

This failure code is related to the TCCU communication line between ECU and 4WD(ECU) and is set if there is no input signal to TCCU.

In case of the vehicle installed ESP & TCS(ABC CONTROL MODULE), ABS control module sends the wheel speed signal to 4WD(ECU) by CAN communication after ABS control module receives the wheel speed signal.

Scheme 18

This failure code is related to the communication line between ESP(ABC CONTROL MODULE) and TCCU and is set if there is no CAN signal to TCCU.

Refer to DTC P1764 TCU CAN MI-COM MALFUNCTION

This failure code is set if CAN BUS ERROR on TCCU is continued for more than 1sec which is caused by poor contact on CAN BUS or the failure of ECM and ABS(ESP).

In case of the vehicle installed ESP & TCS(ABC CONTROL MODULE), ABS control module sends the wheel speed signal to 4WD(ECU) by CAN communication after ABS control module receives the wheel speed signal.

Scheme 19

This failure code is related to the communication line between ESP(ABC CONTROL MODULE) and is set if CAN BUS ERROR that means wrong TCCU installation is continued for more than 1sec.

See also:
• PROPELLER SHAFT ASSEMBLY
• DRIVESHAFT