Automatic Transaxle Push-Button Shifter Diagnosis Guide for Hyundai

Quick Guide: Symptoms and Diagnostics

This bulletin provides diagnostic procedures for push-button shifter operation issues. If a vehicle exhibits any of the following symptoms, follow the service procedure outlined below:

• "Shifter System Malfunction" displayed in the cluster.
• Vehicle will not shift into or out of gear, or will not shift out of Park.
• Incorrect gear display in the cluster or the vehicle will not start.

Technicians should first perform a GDS Fault Code search to identify relevant Diagnostic Trouble Codes (DTCs). Common DTCs include P060148, P065713, P07FF00, P0705**, P0706**, P106D00, P106D13, P106D14, P106D71, P28E214, P28E577, P28E592, P28EA71, P28EA77, U110382, and U110400.

Service Procedure

Follow these steps to diagnose the shifter system:

1. Fault Code Search: Attach a GDS, select Fault Code searching, and record/delete any DTCs. If DTCs are found, refer to the DTC list or shop manual for repair guidance.
2. Data Analysis (A/T Menu): Start the engine, select Data Analysis and A/T menu. Push shift buttons to change gears (P, R, N, D). If the cluster and GDS show the correct gear, the SBW lever and harness are functioning correctly. If not, the SBW lever or harness may be faulty.
3. Data Analysis (SCU Menu): Select Data Analysis and SCU menu. Check Target Lever Position and Actual Lever Position. If these do not match the requested gear, the SCU, SBW actuator, or harness may be faulty.
4. Actuation Test: Turn the engine off, turn ignition ON, and press the brake pedal. Select Actuation Test and SCU menu. Test the Target position for P, R, N, and D. If the test fails, the SCU, SBW actuator, or harness may be faulty.

Note: The Motor Feedback Current should briefly show electrical current when a shift button is pressed. The sum of Position sensor 1 and 2 should be approximately 100%.

Wiring Harness Inspection

If previous steps do not identify a fault, visually inspect the wiring harness between the PCM/TCU and the transmission for damaged wires, open/short circuits, or damaged pins.

• Santa Fe (TMa) 2.5L (VINs with 5NM): Unwrap the harness protector and check for insulation damage caused by contact with the battery tray.
• Tucson (NX4) 2.5L (VINs with KM8): Unwrap the harness protector and check for insulation damage caused by contact with the metal bracket.

If damage is found, repair or replace the control harness. Ensure the replacement harness does not contact the battery tray or other components to prevent future damage.

Parts Information

Refer to the parts catalog using the PNC (Part Number Component) to order correct parts. Key components include the SBW Lever (46700), SBW Control Unit (42950/42951), SBW Actuator (42910), Position sensor (42700), and ECU/TCU (39110/95440).

SBW Operation

Four components are required to shift to P, R, N, and D: Electric shift button, SBW Control Unit (SCU), Electric shift actuator, and Position sensor. Additionally, the PCM or TCU must select the correct transmission solenoids.