Hyundai Tucson Quiz
AUTOMATIC TRANSMISSION SYSTEM

Troubleshooting

In this manual: AUTOMATIC TRANSMISSION SYSTEM
General Information — 17Engine Mechanical System — 51Engine Electrical System — 26Emission Control System — 23Engine/Fuel Control System — 44Clutch System — 12MANUAL TRANSMISSION SYSTEM — 12AUTOMATIC TRANSMISSION SYSTEM — 42Four-Wheel Drive (4WD) System — 14Drive Shaft and Axle — 22Suspension System — 30Steering System — 16Restraint — 21Braking System — 47Body Work (Interior and Exterior) — 145Body Electrical System — 162Heating, Ventilation and Air Conditioning — 39
7steps
~42min
3/5difficulty
Done 0 of 7

▶Troubleshooting

Fail-safe mechanism that maintains 4th gear for emergency driving so the vehicle can be driven to the owner or dealer.

▶Troubleshooting

Symptom Suspected Area REMEDY
Delayed Engagement Clutch / Brake damaged Replace the brake or clutch.
Faulty hydraulic control Check the solenoid valve.
Faulty hydraulic supply Check the fluid level.
TCM learning is not performed. TCM learning is required.
Vehicle vibration during shifting Clutch / Brake damaged Replace the brake or clutch.
TCM learning is not performed. TCM learning is required.
Faulty hydraulic control Check the solenoid valve.
Faulty hydraulic supply Check the fluid level.
Fixed gear (unable to shift) Faulty hydraulic control Check the solenoid valve.
Replace the solenoid valve or valve body.
Faulty harness and connector Check the transmission wiring harness and connector.
Faulty TCM Replace the TCM.
Faulty CAN communication Check the CAN communication line.
Limited speed (speed change possible) Faulty Lock-up Switch Check the lock-up switch.
Faulty Output and Input Speed Sensor Check the output and input speed sensors.
Faulty harness and connector Check the transmission wiring harness and connector.
Poor acceleration Faulty hydraulic control Check the solenoid valve.
Faulty hydraulic supply Check the fluid level.
Faulty oil pump Replace the oil pump.

▶Self-diagnosis

The Transmission Control Module (TCM) constantly communicates with the control system components (sensors and solenoids). If an abnormal signal continues for longer than the specified time, the TCM detects a malfunction, stores the Diagnostic Trouble Code (DTC) in memory, and then outputs the fault signal through the self-diagnosis terminal. These DTCs are stored independently and are not erased even if the ignition switch is turned off, the battery is disconnected, or the TCM connector is disconnected.INSPECTION PROCEDURE (SELF-DIAGNOSIS)Inspection Procedure (Using GDS)
  1. Turn the ignition switch to the OFF position.
  2. Connect the GDS to the data link connector on the lower edge of the instrument panel.
  3. Turn the ignition on.
  4. Use the GDS to check the diagnostic trouble code.
  5. Using the diagnostic chart, repair the faulty part.
  6. Erase the diagnostic trouble code.
  7. Disconnect the GDS.

Test yourself

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