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
...

Other information:

Hyundai Tucson (LM) 2010-2015 Service Manual: In car sensor Repair procedures
Inspection 1. Ignition "ON" 2. Blow air with changing temperature to the in car sensor air inlet. Measure sensor resistance between 1 and 2 terminals. 1. Sensor Ground2. Incar Sensor Signal Specification Temperature [°C(°F)] Resistance between terminals 1and 2 (kx)-20(-4)290.21-10(1 ...

Hyundai Tucson (LM) 2010-2015 Service Manual: Oil Seal Repair procedures
Replacement [Right side] 1. Remove the driveshaft assembly. (RH side) (Refer to Driveshaft and axle - "Front Driveshaft ") 2. Remove the dust cover (A). 3. Remove the oil seal (A, B). 4. Install the oil seal with special service tools.     • Apply lithium t ...

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