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: ETC (Electronic Throttle Control) System Troubleshooting
Fail-Safe Mode ItemFail-SafeETC MotorThrottle valve stuck at 7°TPSTPS 1 faultECM looks at TPS2TPS 2 faultECM looks at TPS1TPS 1,2 faultThrottle valve stuck at 7°APSAPS 1 faultECM looks at APS 2APS 2 faultECM looks at APS 1APS 1,2 faultEngine idle state     When throttle v ...

Hyundai Tucson (LM) 2010-2015 Service Manual: 26 Brake Control Solenoid Valve(26/B_VFS) Specifications
Specifications Direct control VFS[26/B] x Control type : Normal low type Control Pressure kpa (kgf/cmx, psi) 9.81 ~ 500.14(0.1 ~ 5.1, 1.42 ~ 72.54)Current value(mA)50 ~ 850 Internal resistance(x)5.1 ...

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