2021-2024 Hyundai Shifter Malfunction TSB 23-AT-006H-2

Hyundai has issued Technical Service Bulletin (TSB) 23-AT-006H-2 to address concerns related to the automatic transaxle push-button shifter system in various 2021-2024 models, including the Hyundai Tucson shifter malfunction. This TSB supersedes the previous bulletin, 23-AT-006H-1, by adding crucial information regarding harness damage repair, particularly for the Tucson (NX4A). The bulletin outlines a comprehensive diagnostic process for technicians to identify and resolve issues affecting the push-button shifter's operation.

This TSB is critical for owners experiencing a Hyundai Tucson shifter malfunction or similar problems, as it provides the official manufacturer-recommended steps to diagnose and repair the underlying cause.

Symptoms of a Shifter System Malfunction

Owners of affected Hyundai vehicles may observe one or more of the following symptoms, indicating a potential issue with the push-button shifter system:

• A warning message, "Shifter System Malfunction," displayed in the instrument cluster.
• Inability to shift the vehicle into or out of gear, or difficulty shifting out of Park.
• An incorrect gear display shown in the cluster, or the vehicle may not start.

Fault Codes / DTCs

Technicians will perform a fault code search using a Global Diagnostic System (GDS) tool. The following Diagnostic Trouble Codes (DTCs) may be present, indicating specific issues with the automatic transaxle push-button shifter system:

DTC	Description
P060148	Functional Safety Level 2 SW failure
P065713	SBW actuator power relay error
P07FF00	SBW system Error – Abnormal power voltage
P0705**	Transmission range circuit malfunction
P0706**	Transmission range circuit range/performance
P106D00	SBW actuator stuck
P106D13	SBW actuator stuck - open/short
P106D14	SBW system Error - UVW open/short
P106D71	SBW actuator stuck
P28E214	Shift motor UVW circuit – open
P28E577	SBW actuator commanded position not reached - Short
P28E592	SBW motor performance
P28EA71	SBW actuator stuck
P28EA77	SBW actuator commanded position not reached
U110382	Lost communication with TGS lever
U110400	Lost communication with TGS lever

Note: DTCs with "**" may have additional digits for specific fault conditions.

Diagnosis and Trigger Conditions

The diagnostic process for a Hyundai Tucson shifter malfunction or related issues involves several steps using a GDS tool to analyze data from the vehicle's control units.

1. Initial Fault Code Scan: A GDS is used to search all vehicle systems for fault codes. Any recorded DTCs and their descriptions are noted, and then the codes are cleared. If DTCs persist, technicians refer to the detailed DTC list in the TSB or the relevant shop manual sections for the E-Shifter or SBW Control Unit.
2. Shifter Lever Data Analysis: With the engine running, technicians access the A/T menu in the GDS Data Analysis section. They push the shift buttons to change gears (P, R, N, D) and observe if the instrument cluster and GDS data show the correct gear. If the gear display is incorrect, it indicates a potential fault in the SBW lever (push-button shifter) or its related harness. If no damage or loose pins are found in the harness, the SBW lever may need replacement.
3. SBW Control Unit (SCU) Data Analysis: Still with the engine running, technicians move to the SCU menu in GDS Data Analysis. They again push the shift buttons and check for correct "Target Lever Position" and "Actual Lever Position" values. Correct values suggest the SBW actuator, position sensors, and harness are functioning. Incorrect values point to a fault in the SCU or its harness. The "Motor Feedback Current" is also checked; a lack of current when shifting suggests an SCU or harness fault.
4. Actuation Test: With the engine off and ignition ON (after pressing the SSB button twice and the brake pedal), an Actuation Test is performed via the GDS SCU menu. Technicians test the "Target Position" for P, R, N, and D. If the GDS and cluster show the correct target position, the SCU, SBW actuator, and harness are likely functioning correctly. If not, a fault in the SCU, SBW actuator, or related harness is indicated.

Repair Procedure Summary

If the initial diagnostic steps (3-5) do not reveal a fault, or if the issue is intermittent, the next critical step is a visual inspection of the wiring harness.

1. Wiring Harness Inspection: Technicians must visually check the wiring harness connecting the PCM or TCU to the transmission for any signs of damage, open circuits, short circuits, or damaged/loose pins in the connectors.
2. Harness Repair or Replacement:
   • If damage or an open/short circuit is found, the related harness must be repaired or replaced.
   • For Santa Fe (TMa) 2.5L or Tucson (NX4/NX4A) 2.5L (VINs beginning with "5NM"): The harness protector in a specific area must be unwrapped. Technicians will check for insulation damage caused by contact with the battery tray. If damage is found, the control harness is repaired or replaced.
   • For Tucson (NX4/NX4A) 2.5L (VINs beginning with "KM8" or "5NM"): The harness protector in specific areas must be unwrapped. For NX4 (KM8) models, insulation damage from contact with a metal bracket is checked. For NX4A (5NM) models, broken wires in the area of a 90-degree bend in the harness are inspected. Any damage requires repair or replacement of the control harness.
3. Intermittent Issues: If no faults are found after these steps and the issue cannot be duplicated, the problem may be intermittent, and technicians are advised to contact Hyundai Techline for further guidance.

Required Tools or Parts

Diagnosis and repair of the Hyundai Tucson shifter malfunction and related issues require specific tools and potential replacement parts.

• Global Diagnostic System (GDS): Essential for fault code searching, data analysis, and actuation tests.
• Replacement Parts (if necessary):
  • SBW Lever (Push button shifter) - PNC 46700
  • SBW Control Unit (SCU) - PNC 42950, 42951
  • SBW Actuator - PNC 42910
  • Position sensor - PNC 42700
  • ECU (Unified ECU/TCU) - PNC 39100, 39101, 39110, 39111, 39116, 39131, 39132
  • TCU - PNC 95440, 954A1

Note: Specific part numbers may vary and are typically identified by the last few digits (e.g., 467W0-*****).

Important Warnings

Owners and technicians should be aware of the following critical information:

• This TSB, 23-AT-006H-2, supersedes TSB 23-AT-006H-1. Owners searching for the older bulletin should refer to this updated document.
• Warranty Claims: Normal warranty applies to these repairs. If a part requiring replacement is still under warranty, a separate claim should be submitted using the same repair order. For out-of-warranty parts, a Prior Approval request for goodwill consideration may be submitted.
• Harness Replacement Caution: "If replacing the control harness, make sure the replacement harness does not contact the battery tray or other components. Otherwise, the harness may become damaged again."
• Hidden Damage: "Damage to the wiring harness may still be present, even if there is no external damage to the harness protector. Even slight damage to the wiring harness can cause these faults." This means a thorough inspection is crucial, even if external signs of damage are absent.

Owner Action

If you are experiencing a "Shifter System Malfunction" message, difficulty shifting, or an incorrect gear display in your 2021-2024 Hyundai, it is recommended to schedule an appointment with an authorized Hyundai service center. Inform them about the symptoms you are experiencing and mention Technical Service Bulletin 23-AT-006H-2. The diagnostic and repair procedures outlined in this TSB will help technicians accurately identify and resolve the issue with your automatic transaxle push-button shifter.

---

Source: NHTSA ID: 10245580