Toyota Corolla (E120): Brake booster assy

Overhaul

On–vehicle inspection

Other materials:

Problem symptoms table
The suspected circuits or parts for each problem symptom are shown in the table below. Use this table to troubleshoot the problem when a normal code is displayed in the diagnostic trouble code chart but the problem is still occurring. Numbers in the table indicate the order in which the circ ...

Driving
►  Automatic transmission or continuously variable transmission 1 With the brake pedal depressed, shift the shift lever to D. (, 174, 176) 2 Release the parking brake. 3 Gradually release the brake pedal and gently depress the accelerator pedal to accelerate the vehicle. ► ...

Circuit description
Shifting from 1st to o/d is performed in combination with on and off of the shift solenoid valve s1 and s2 controlled by ecm. If an open or short circuit occurs in either of the solenoid valves, the ecm controls the remaining normal solenoid valve to allow the vehicle to be operated smoothly ...