Toyota Corolla car engine can not start
A driving range of about 130,000 km, the model for the ASU40L, equipped with 1AR engine 2010 Toyota Gaslamp Highlander sport utility vehicle. Users reflect: The car made in the block, the transmission will be issued "magnetic, magnetic" sound.
Inspection and Analysis: Maintenance car fans c800 personnel test found that when the shift lever from P to N block, the transmission will be issued abnormal sound, but the road test found that the transmission gear shift normal. Further test found that if the shift lever back and forth in the P, N block toggle, the sound becomes a continuous sound.
Remove the working oil pressure test plug on the right side of the transmission and connect the hydraulic gauge. Start the engine to preheat the carkeydeals transmission and set the diagnostic meter to the active test state. After the transmission oil temperature reaches the normal temperature, perform the test of the oil pressure regulating solenoid valve S LT. When the solenoid valve is working, the working oil pressure reaches the standard oil pressure when the transmission is no-load. After the solenoid valve is closed, the working oil pressure reaches the maximum value and meets the standard. This will eliminate the hydraulic control problems.
After the vehicle is lifted to simulate the driving status of the road, and the active test function of the diagnostic instrument is used to control the shift process of the transmission, it is found that the shift of each gear is normal. The vehicle speed increased to 65 km / h, with the diagnostic instructor torque converter lock-up clutch, and then light on the accelerator pedal, you can feel no significant changes in engine speed, lock function normally.
According to the sound characteristics of abnormal sound judgments, it may come from linear pressure regulating solenoid valve. So xhorse key cutting machine through the diagnostic instrument one by one off the linear solenoid valve, when closed to lock the oil pressure regulating solenoid valve SLU, the sound disappeared immediately.
Remove the oil pan to find the SLU solenoid valve, the vehicle maintenance staff to open the ignition switch, and then the shift lever from the cadaver to N block, then the solenoid valve issued a "magnetic" sound. Touching the surface of the solenoid valve by hand can feel the temperature significantly higher than other solenoid valves. Remove the solenoid valve, until the temperature cooled to 20'c after measuring the coil resistance, resistance is 12.6Ω, higher than the normal resistance, indicating that the coil has been burned out.
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