- a) Turn on the ignition. Do not start the engine.
- b) Connect the voltmeter to the diagnostic connector contacts "TT" and "E1".
Models before 1996. | 
Models since 1996. |
- c) By pressing the accelerator pedal smoothly, check the voltage change. If the voltage does not change as shown in the figure, the sensor or its circuit is faulty.
Models before 1996. | 
Models since 1996. |
2. Check the purpose of the brake light switch.
- a) Press the accelerator pedal all the way down, the voltage on the "TT" contact should be. The voltage
- models before 1996: 6V
- models since 1996: 8V
- b) Press the brake pedal and check the voltage at the "TT" contact. Voltage:
- brake pedal pressed: 0 V.
- brake pedal released: pre-1996 models: 6V; models since 1996: 8 V.
- c) If there is a deviation from the specified voltages, then the fault is in the brake light switch circuit.
3. Check the moments of upshifting.
- a) Warm up the engine to a coolant temperature of 80°C.
- b) Set the overdrive switch to the "ON" position.
- c) Set the selector to position "D" and the automatic transmission mode switch to the "NORMAL" position.
- d) During road tests (speed over 10 km/h) check the voltage change at the "TT" terminal of the automatic transmission and engine control unit connector during upshifts.
- d) If the voltage increases from 0 V to 7 V, then everything is normal.
Models before 1996.
| 0 B | First gear | |
| 2 B | Second gear | |
| 4 B | Third gear | |
| 5 V | Third gear with torque converter lock-up (only A241E) | |
| 6 B | Overdrive | |
| 7 B | Overdrive with lock-up torque converter |
A245E
| 0 B | First gear |
| 1 B | Second gear |
| 2 B | Third gear |
| 3 B | Third gear with controlled slip of torque converter lock-up clutch |
| 4 B | Third gear with torque converter lock-up |
| 5 V | Overdrive |
| 6 B | Overdrive with controlled slip of torque converter lock-up clutch |
| 7 B | Overdrive with lock-up torque converter |
Models since 1996. (A540N, A241E)
| 0 B | First gear |
| 2 B | Second gear |
| 3 B | Second gear with torque converter lock-up |
| 4 B | Third gear |
| 5 V | Third gear with torque converter lock-up |
| 6 B | Overdrive |
| 7 B | Overdrive with lock-up torque converter |
Note: Shifting to the next gear can be determined by a slight jolt or change in engine speed.
See the source on the internet resource toyotaman.ru