Code No.P0777: Clutch control solenoid No.1 system (ON sticking)

OPERATION

Refer to

DIAGNOSIS CODE SET CONDITIONS

While the engine is running, when the fluid temperature is 20°C or more, the engine coolant temperature is 40°C or more, the drive mode selector position is in other than 4L/4LLc, and the mode is in other than sport mode (1st/2nd/3rd), if a status is detected with which the gear ratio (1st/2nd/3rd/5th) does not change according to the shift pattern due to the ON seizure of clutch control solenoid No.1 (2 drive cycle), code No.P0777 is set.

note

When the ON seizure of clutch control solenoid No.1 is detected, the normal gear ratio cannot be obtained because the gear does not change as shown in the table when the gear is in 1st/2nd/3rd/5th.

Shift range (gear ratio)	Shift range (gear ratio) at ON seizure
1st (3.520)	1st (3.520)
2nd (2.042)	Neutral
3rd (1.400)	3rd (1.400)
4th (1.000)	4th (1.000)
5th (0.716)	5th (0.716)

PROBABLE CAUSES

Malfunction of valve body (clutch control solenoid No.1)
Damaged harness wires and connectors
Malfunction of the A/T-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III actuator test

Item 6: Clutch control solenoid No.1

OK: Operating sound can be heard.

Q. Is the check result normal?

	Go to Step 2.

	Replace the valve body (clutch control solenoid No.1) and solenoid harness.

STEP 2. Check whether the diagnosis code is set again.

Check again if the diagnosis code is set.

Q. Is code No.P0777 set?

	Replace the A/T-ECU.

	Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).