Hyundai Tucson: 4WD Control System / 4WD ECU Repair procedures

Replacement
1.
Prior to replacing the 4WD ECU, check the 4WD ECU's clutch learing with the GDS tool.
(Refer to 4WD Control System - "Adjustment")
2.
Disconnect the battery negative cable from the battery
3.
Disconnect the 4WD ECU connector (A).

4.
Loosen the nust (A) and then remove the 4WD ECU.

Tightening torque:
9.8 ~11.8N.m (1.0~1.2kgf.m, 7.2~8.7lb-ft)

Installation
1.
Install in the reverse order of removal.
2.
Prior to installing a new ECU, upload the original ECU’s clutch learing to the replacement ECU using the GDS tool.
(Refer to 4WD Control System - "Adjustment")
4WD ECU Schematic Diagrams
Circuit Diagram 4WD ECU Connector PinFunction1CAN communication line (Low)2CAN communication line (High)3-4Pressure sensor signal(+)5-6Lock mode switch7Oil pressure motor B8Oil pressure motor ...

Coupling Assembly
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Other information:

Hyundai Tucson (LM) 2010-2015 Service Manual: Overdrive Clutch Control Solenoid Valve(OD/C_VFS) Specifications
Specifications Direct control VFS[OD/C] x Control type : Normal high type Control Pressure kpa (kgf/cmx, psi) 500.14 ~ 9.81(5.1 ~ 0.1, 72.54 ~ 1.42)Current value(mA)50 ~ 850 Internal resistance(x)5.1 ...

Hyundai Tucson (LM) 2010-2015 Service Manual: Instrument Cluster Description and Operation
Description ECO driving system This system is designed to encourage eco-driving by providing real-time feedback to the driver. The ECO indicator light assists you to drive in the most economical way. The green indicator comes on when you drive with high fuel efficiency. The fuel efficiency d ...

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