Hyundai Palisade Quiz
Automatic Transmission System (A8LF1)

Transmission Control Module (TCM)

In this manual: Automatic Transmission System (A8LF1)
General Information — 10Engine Mechanical System — 56Engine Electrical System — 28Emission Control System — 21Engine Control System/Fuel System — 42Automatic Transmission System (A8LF1) — 33All-Wheel Drive (AWD) System — 16Drive Shaft and Axle — 19Suspension System — 28Steering — 17Restraints — 20Brake System — 39Body (Interior and Exterior) — 142Body Electrical System — 171Heating, Ventilation, and Air Conditioning — 47Advanced Driver Assistance System (ADAS) — 44
13steps
~78min
3/5difficulty
Done 0 of 13

Components and Component Location

Component Location

Hyundai Palisade. Components and components location
1. Transmission Control Module (TCM)

Description and Operation

Description

  • Monitors vehicle driving conditions to determine the optimal gear setting.
  • Performs a shift if the current gear setting differs from the determined optimal gear setting.
  • Determines whether to engage and release the damper clutch (D/C) accordingly.
  • Calculates the optimal line pressure level by constantly monitoring the torque level and adjusts the pressure accordingly.
  • Diagnoses the automatic transmission (A/T) for malfunctions and failures.
    Hyundai Palisade. Description and operation

Circuit Diagrams

TCM Connector

Hyundai Palisade. Schematic diagrams

TCM Terminal Function

Pin Description Pin Description
1 UD Clutch Control Solenoid Valve (UD/C_VFS) 34 Input Speed Sensor Signal
2 46 Clutch Control Solenoid Valve (46/C_VFS) 43 CAN High
3 Line Pressure Control Solenoid Valve (LINE_VFS) 52 CAN Low
5 Torque Converter Control Solenoid Valve (T/CON_VFS) 56 Output Speed Sensor Power
7 28 Brake Control Solenoid Valve (28/B_VFS) 57 Mid Speed Sensor Power
8 37R Clutch Control Solenoid Valve (37R/C_VFS) 58 Input Speed Sensor Power
9 OD Clutch and LR Brake Control Solenoid Valve (OD/C and LR/B_VFS) 65 Power Solenoid Valve 1 (2, 5, 7, 8)
17 IG1 66 Power Solenoid Valve 2 (1, 3, 9, 27)
25 Transmission Fluid Temperature Sensor (+) 67 Power
26 Oil Temperature Sensor (-) 68 Power
27 SS-A Solenoid Valve (SS-A_ON/OFF) 71 Ground
31 Mid Speed Sensor Signal 73 Ground
32 Output Speed Sensor Signal 74 Ground

TCM Terminal Input/Output Signal

Pin Description Condition Input/Output Value
Type Level
1 UD Clutch Control Solenoid Valve
(UD/C_VFS)		 - Output 0 V/Battery Voltage Level
9 V < Battery Voltage Level < 16 V
2 46 Clutch Control Solenoid Valve
(46/C_VFS)		 - Output 0 V/Battery Voltage Level
9 V < Battery Voltage Level < 16 V
3 Line Pressure Control Solenoid Valve
(LINE_VFS)		 - Output 0 V/Battery Voltage Level
9 V < Battery Voltage Level < 16 V
5 Torque Converter Control Solenoid Valve (T/CON_VFS) - Output 0 V/Battery Voltage Level
9 V < Battery Voltage Level < 16 V
7 28 Brake Control Solenoid Valve
(28/B_VFS)		 - Output 0 V/Battery Voltage Level
9 V < Battery Voltage Level < 16 V
8 37R Clutch Control Solenoid Valve
(37R/C_VFS)		 - Output 0 V/Battery Voltage Level
9 V < Battery Voltage Level < 16 V
9 OD Clutch and LR Brake Control Solenoid Valve (OD/C and LR/B_VFS) - Output 0 V/Battery Voltage Level
9 V < Battery Voltage Level < 16 V
17 IG1 On Power 0 V/Battery Voltage Level
Off 9 V < Battery Voltage Level < 16 V
25 Transmission Fluid Temperature Sensor (+) ON Input 0V/5V
OFF
26 Oil Temperature Sensor (-) - Ground 0 V
27 SS-A Solenoid Valve (SS-A_ON/OFF) High Output 0 V/Battery Voltage Level
Low 9 V < Battery Voltage Level < 16 V
31 Mid Speed Sensor Signal High Input 0.7 V/1.4 V
Low
32 Output Speed Sensor Signal High Input 0.7 V/1.4 V
Low
34 Input Speed Sensor Signal High Input 0.7 V/1.4 V
Low
56 Output Speed Sensor Power ON Power 0V/9V
OFF
57 Mid Speed Sensor Power On Power 0V/9V
Off
58 Input Speed Sensor Power On Power 0V/9V
Off
65 Power Solenoid Valve 1 - Power 0 V/Battery Voltage Level
9 V < Battery Voltage Level < 16 V
66 Power Solenoid Valve 2 - Power 0 V/Battery Voltage Level
9 V < Battery Voltage Level < 16 V
67 Power On Power 0 V/Battery Voltage Level
Off 9 V < Battery Voltage Level < 16 V
68 Power On Power 0 V/Battery Voltage Level
Off 9 V < Battery Voltage Level < 16 V
71 Ground - Ground 0 V
73 Ground - Ground 0 V
74 Ground - Ground 0 V

Repair Procedures

Inspection

  1. TCM Ground Circuit Inspection: Measure the resistance between the TCM and chassis ground. (Inspect the terminal connected to chassis ground at the rear of the harness connector as the check point on the TCM side.)

    Specification: Less than 1 ohm

  2. TCM Connector Inspection: Disconnect the TCM connector and visually inspect the ground terminals on the TCM side and harness side for bent pins or poor contact pressure.
  3. If no problem is found in steps 1 and 2, the TCM may be faulty. If so, replace the TCM with a new one, then recheck the vehicle. If the vehicle operates normally, the problem was most likely in the TCM.
  4. Recheck the original TCM: Install the original TCM (presumed faulty) into a known good vehicle and check the vehicle. If the problem recurs, replace the original TCM with a new one. If the problem does not recur, the problem is intermittent and another part may be faulty.

Removal

  1. Perform the oil pressure characteristics backup procedure with the diagnostic tool when replacing with a new TCM.
    Hyundai Palisade. Repair procedures
  2. Turn the ignition switch OFF and disconnect the negative (-) battery cable.
  3. Remove the glove box. (Refer to Body (Interior and Exterior) - Glove Box)
  4. Remove the Integrated Body Control Unit (IBU). (Refer to Body Electrical System - Integrated Body Control Unit (IBU))
  5. Remove the Integrated Control Module (ICM) relay block. (Refer to Body Electrical System - Fuse and Relay)
  6. Remove the TCM
    1. Disconnect the TCM connector (A).
      Hyundai Palisade. Repair procedures
    2. Remove the TCM (D) by loosening the mounting nuts (B) and then the bolts (C).
      Hyundai Palisade. Repair procedures
    3. Remove the TCM (F) by loosening the nuts (E) on the bracket.
      Hyundai Palisade. Repair procedures

Installation

  1. To install, reverse the removal procedure.
  2. Perform the oil pressure characteristics input procedure with the diagnostic tool when replacing with a new TCM.
    Hyundai Palisade. Repair procedures
  3. To avoid any problems, including a feeling of delayed transmission engagement and shock during acceleration and vehicle start, be sure to perform the TCM learning procedure after replacing the transmission/TCM. (Refer to Automatic Transmission Control System - Repair Procedures)

Test yourself

A quick Hyundai Palisade quiz: every answer comes with an explanation and a link to the manual page.