What is the sudden slow response of Lexus automatic gear with one button start?

The reasons for the sudden slow response of Lexus automatic transmission in Pacific Auto Network are: 1, the spark plug is damaged; 2. The voltage is too weak because the distributor contacts are burnt out; 3. The dry igniter is damaged, resulting in weak ignition; 4, high voltage line leakage.

Maintenance of Lexus automatic gearbox: the influence of gear shift

I. Vehicle details: Date: 20191KLOC-0/28 October Customer: Mr. Zhao from Huizhou, model: Toyota LS40.

0. Gearbox model: A34 1E, mileage: 1 1 ten thousand kilometers.

Second, gearbox failure: the car was overhauled in the repair shop because it didn't run. When the car is cold after repair, especially when the car is started for the first time in the morning, the shift lever is put into D gear, and the automatic gearbox is delayed for too long, then the car can start driving after an abnormal collision. When the hot car starts to shift, the automatic gearbox shifts normally, and there is no impact sound.

Lexus automatic gearbox maintenance, Guangzhou Chuanxing automatic gearbox specialized.

Third, gearbox failure analysis: The failure phenomenon of gear impact during the maintenance of Toyota automatic gearbox is relatively common, which is generally caused by oil pressure adjustment failure, especially when it is cold.

Although the automatic gearbox has been overhauled, the inspection should start from the foundation. First, check whether the oil level and oil quality of the automatic transmission are normal, and check whether the throttle wiring adjustment is normal. The control unit of automatic transmission was diagnosed, but no fault code was output. Possible reasons for failure are:

1, the clutch clearance of automatic transmission is too large, the viscosity of automatic transmission oil is high when the car is cold, and the clutch engagement time is prolonged, which has a great impact on the gear position;

2. The accumulator fails. The function of accumulator is to make the clutch move softly when it is engaged, and it can also cause gear impact after damage;

3. Valve body failure. Valve groups such as shift valve, regulating valve and changeover valve are issued with cards. When the car is cold, the viscosity of automatic transmission oil is high, and the slide valve moves slowly, causing impact.

Four. Maintenance process of gearbox: Based on the principle of maintenance from simplicity to complexity, the valve body was just disassembled, and it was found that it was dirty (not completely disassembled in the original repair shop), and two slide valves and sliding holes were slightly strained. The analysis was that the car got stuck when it was cold. Gently grind the tightened slide valve in the valve hole with automatic transmission oil to make it move smoothly, then clean, assemble and test, and troubleshoot.

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(Photo/Text/Photo: Pacific Auto Network Q&A called Beast)