2020-2023 Hyundai Push-Button Shifter Malfunction TSB

Hyundai has released Technical Service Bulletin (TSB) 23-AT-006H-1 to address concerns with the automatic transaxle push-button shifter in several models. This TSB supersedes TSB 23-AT-006H, adding an applicable model and the diagnostic trouble code (DTC) P0706**, while also modifying a step in the service procedure. The bulletin provides comprehensive information to diagnose and resolve issues related to the push-button shifter operation, which can manifest as various symptoms and diagnostic trouble codes.

Symptoms of a Hyundai Push-Button Shifter Malfunction

Owners may experience several noticeable symptoms indicating a problem with the automatic transaxle push-button shifter. These can impact the vehicle's ability to shift gears or even start.

Common symptoms include:

• A message stating "Shifter System Malfunction” displayed in the instrument cluster.
• The vehicle won't shift into or out of gear.
• The vehicle won't shift out of Park.
• An incorrect gear display in the cluster.
• The vehicle won't start.

Fault Codes / DTCs

When diagnosing a Hyundai push-button shifter malfunction, technicians may find specific diagnostic trouble codes (DTCs) stored in the vehicle's system. These codes pinpoint potential electrical or mechanical issues within the shifter system or related components.

DTC	Description
P060148	Functional Safety Level 2 SW failure (See TSB 21-AT-008H-1)
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 (See TSB 21-AT-008H-1)
P106D13	SBW actuator stuck - open/short
P106D14	SBW system Error - UVW open/short
P106D71	SBW actuator stuck (See TSB 21-AT-008H-1)
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 (See TSB 21-AT-008H-1)
U110400	Lost communication with TGS lever

Diagnosis and Trigger Conditions

Diagnosing the Hyundai push-button shifter malfunction involves a systematic approach using the Global Diagnostic System (GDS). Technicians will look for specific conditions and monitor data to identify the root cause.

The diagnostic process, as outlined in TSB 23-AT-006H-1, includes:

1. GDS Fault Code Search: Attach a GDS, select "Fault Code searching," choose "All," and press "OK." Record any Diagnostic Trouble Codes (DTCs) and their descriptions, then delete the DTCs. If no DTCs are found, proceed to step 3 of the GDS procedure.
2. GDS Data Analysis (A/T Menu): Start the engine. From the GDS home screen, select "Data Analysis" and then the "A/T" menu. Monitor the parameters shown. Push the shift buttons to change gears (P, R, N, D). If the cluster and GDS data show the correct gear, the TCU is receiving correct signals, and the SBW lever and related harness are functioning correctly without open/short circuits. If the correct lever position is not shown, the SBW lever or related harness may have a fault. If no damage or loose pins are found, replace the SBW lever.
3. GDS Data Analysis (SCU Menu): Start the engine. From the GDS home screen, select "Data Analysis" and then the "SCU" menu. Monitor the parameters shown. Push the shift buttons to change gears. If the GDS data shows correct "Target Lever Position" and "Actual Lever Position," the SCU commanded the SBW actuator to shift correctly, and the actuator and position sensors are functioning properly. If the "Target Lever Position" is not correct, the SCU did not command the SBW actuator. If the "Actual Lever Position" is not correct, the SBW actuator did not select the requested gear. In both cases, the SCU or related harness may have a fault. The "Motor Feedback Current" should briefly show electrical current when a shift button is pressed. Also, the sum of "Position sensor 1" and "Position sensor 2" should be approximately 100%.
4. GDS Actuation Test: Turn the engine off and push the Start/Stop button (SSB) twice to turn the ignition ON. Press the brake pedal. From the GDS home screen, select "Actuation Test" and the "SCU" menu. Test the "Target Position" for P, R, N, and D. Press the arrow to change the selection. If the GDS and cluster show the correct "Target Position," the SCU sent electrical current, and the SBW actuator and related harness are operating correctly. If the correct "Target Position" is not shown, the SCU, SBW actuator, or related harness may have a fault.

Repair Procedure Summary

If the GDS diagnostic steps (3-5) do not reveal any faults, a visual inspection of the wiring harness is required. This is a critical step in resolving the Hyundai push-button shifter malfunction.

1. Wiring Harness Inspection: Visually check the wiring harness between the PCM or TCU and the transmission for any damaged wires, open/short circuits, damaged pins, or pins not fully inserted into the connector.
2. Specific Vehicle Instructions: For Santa Fe (TMa) 2.5L (VINs beginning with “5NM”) and Tucson (NX4) 2.5L (VINs beginning with “KM8”) vehicles, carefully unwrap the harness protector in the specified areas. Check the insulation for damage caused by contact with the battery tray (Santa Fe) or metal bracket (Tucson). If damage is found, repair or replace the control harness.
3. Resolution: If damage or an open/short circuit is found, repair or replace the related harness. If no damage is found and the issue cannot be duplicated, the problem may be intermittent, and further advice from Techline may be needed.

Required Parts

Refer to the parts catalog using the PNC (Parts Number Code) to order the correct part numbers for components that may need replacement during this repair.

DESCRIPTION	PNC	PART NUMBER
SBW Lever	46700	467W0-*****
SBW Control Unit (SCU)	42950	42950-*****
	42951	42951-*****
SBW Actuator	42910	42910-*****
Position sensor	42700	42700-*****
ECU (Unified ECU/TCU)	39110	39100-*****
		39101-*****
		39110-*****
		39111-*****
		39116-*****
TCU	95440	39131-*****
		39132-*****
		95440-*****
		954A1-*****

Warranty Information

This TSB outlines specific warranty claim procedures for the repair of the automatic transaxle push-button shifter issues.

Model	OP Code	Operation	Op Time	Causal Code	Nature Code
2020~ Palisade (LX2)	42700R00	Range switch	Refer to	13A	ZZ3
2021~ Santa Fe (TMA) 2.5L/2.5T	46700R00	Electronic lever	WEBLTS
2021-2022 Santa Fe Hybrid (TM HEV)	42910R00	Parking Actuator	for
2023~ Santa Fe Hybrid (TMa HEV)	42950R00	SBW Control Unit	current
2020~ Sonata (DN8/DN8A)	39110R00	Engine control unit	LTS time
2020~ Sonata Hybrid (DN8 HEV)	95440R00	Transmission control unit
2022~ Tucson (NX4/NX4A) 2.5L
2022~ Tucson Hybrid (NX4 HEV) 1.6T
2021-2022 Santa Fe Hybrid (TM HEV)	42700RH1	Hybrid
2023~ Santa Fe Hybrid (TMa HEV)
2020~ Sonata Hybrid (DN8 HEV)
2022~ Tucson Hybrid (NX4 HEV)	42700RQ0	GDS

Important Warnings for Owners and Technicians

• NOTE 1: Normal warranty applies.
• NOTE 2: Submit claim on Claim Entry Screen as “Warranty” type.
• NOTE 3: Refer to the latest Digital Documentation Policy for repair validation requirements.
• NOTE 4: The incident parts are subject to callback through the normal Warranty Technical Center (WTC) parts return process. Claim is subject to debit if the parts requested are not returned.
• NOTE 5: If a part is found in need of replacement while performing this TSB and the affected part is still under warranty, submit a separate claim using the same repair order. If the affected part is out of warranty, submit a Prior Approval request for goodwill consideration prior to performing the work.
• Information: 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.
• NOTICE: If replacing the control harness, make sure the replacement harness does not contact the battery tray/other components. Otherwise, the harness may become damaged again.

SBW Operation Overview

The Shift-By-Wire (SBW) system relies on four main components to shift the vehicle into Park, Reverse, Neutral, and Drive. Additionally, the Powertrain Control Module (PCM) or Transmission Control Unit (TCU) plays a crucial role in selecting the correct transmission solenoids to execute the shift commands.

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Source: NHTSA TSB 23-AT-006H-1