The location of the elements of the electronic control system of the automatic transmission on the car
1 – starter lock switch; 2 – locking solenoid; 3 – speed sensor #1; 4 – coolant temperature sensor; 5 – electrical data connector 1; 6 – ECM block; 7 – throttle position sensor; 8 – O/D switch; 9 – switch; 10 – indicator; 11 – instrument cluster; 12 – DLC2 (data output connector #2); 13 – brake light switch; 14 – speed sensor #2; 15 – ignition coil
The electronic transmission control system has a self-diagnosis function. If there are any faults in the transmission, they are recorded in the ECM unit as codes, and the control lamp lights up. The definition of fault codes of the automatic transmission can be done as follows.
1. Turn on the ignition.
2. Move the main O/D switch to the operating position.
3. Using an additional wire, connect contacts E1 and TE1 in the test connector.
(This material is taken from a resource www.ToyotaMan.ru)
4. To determine the fault code, count the number of flashes of the indicator lamp. The number of flashes of the indicator lamp before the pause determines the first number of the fault code, and the number of flashes after the pause determines the second number of the fault code.
5. After troubleshooting, to erase the trouble code from memory, turn off the ignition and remove the EFI1 fuse for more than 10 seconds.
Error codes
| Fault code | Defect |
| 42 | speed sensor #1, speedometer drive sensor or their electrical circuits are faulty |
| 61 | speed sensor #2 or its electrical circuit is faulty |
| 62 | the solenoid of lock #1 or its electrical circuit is faulty |
| 63 | the solenoid of lock #2 or its electrical circuit is faulty |