Troubleshooting

Troubleshooting

Limp Home Mode

Has a fail-safe function that prevents dangerous situations in the event of a transmission failure. The vehicle will drive in fail-safe mode if the transmission malfunctions. In this mode the transmission operates at minimum function level (fixed gear, limited shifting, reverse, neutral), allowing the vehicle to reach a service center.

Limp Home Mode: Limited Shifting Mechanical Fail-Safe Mode: Fixed Gear (mechanical part failure, solenoid valves, TCM, CAN communication)

Troubleshooting

Symptom of Malfunction	Suspected Area	Remedy
Shift Delay, Shift Shock, Poor Acceleration	Clutch/brake damaged	Replace the brake or clutch.
	Faulty hydraulic control	Inspect the solenoid valve.
	Faulty hydraulic supply	Check the fluid level.
		Check fluid cleanliness.
		Replace the oil pump.
	TCM learning not performed	Perform TCM adaptive learning values.
Mechanical Fail-Safe Mode (locked in 4th gear, manual shifting disabled)	Faulty solenoid valve	Inspect the solenoid valve.
		Replace the valve body.
	Faulty TCM	Replace the TCM.
	Faulty CAN communication	Inspect the CAN communication line.
Limp Home Mode (locked in 4th gear, manual shift 2nd to 4th enabled)	Faulty input and output speed sensor	Replace the input and output speed sensors.
Limp Home Mode (1st to 2nd shift disabled, 3rd to 6th shift enabled)	Faulty lock switch	Replace the inhibitor switch.
Manual shift disabled	Faulty TCM	Replace the TCM.
	Faulty connector connection	Check the connection of the manual mode connector.
	Faulty manual mode switch	Replace the manual mode switch housing.