Location of elements of the electronic control system of an automatic transmission on a car
1 - starter blocking switch; 2 - locking solenoid; 3 – speed sensor No. 1; 4 - coolant temperature sensor; 5 - electrical connector data 1; 6 - ECM block; 7 - throttle position sensor; 8 – O/D switch; 9 - switch; 10 - indicator; 11 – a combination of devices; 12 - DLC2 (data output connector #2); 13 - stoplight switch; 14 - speed sensor No. 2; 15 - ignition coil
The electronic transmission control system has a self-diagnostic function. If there are faults in the transmission, they are recorded in the ECM in the form of codes, and the control lamp lights up. The definition of fault codes for an 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 the contacts E1 and TE1 in the control connector.
4. To determine the DTC, count the number of flashes of the warning lamp. The number of flashes of the control lamp before the pause determines the first number of the DTC, and the number of flashes after the pause determines the second number of the DTC.
5. After troubleshooting, to erase the fault code from the memory, turn off the ignition and remove the EFI1 fuse for more than 10 seconds.
Fault codes
Fault code | Defect |
42 | defective speed sensor No. 1, speedometer drive sensor or their electrical circuits |
61 | defective speed sensor No. 2 or its electrical circuit |
62 | Faulty lock solenoid No. 1 or its electrical circuit |
63 | faulty lock solenoid No. 2 or its electrical circuit |