TCM, FA 57 (502a)
| TCM, FA 57 (502a) | 
| Main use | 
Controlling shifting points, system pressure and engagement of lock up.
| Type | 
Microprocessor controlled IO device, working memory and one programmable EEPROM read memory.
| Power supply, ground and bus communication | 
The control module is powered on pin 33 (A) with +30 voltage and on pins 31 (A) and 22 (A) with +15 voltage. The module is grounded via pins 32 (A) and 23 (A) to grounding point G33T. Bus communication (P-bus) takes place on pins 25-26 (A) and 35-36 (A).
 
   
   | Pin no. | Interface | Description | 
| 33 (A) | + 30 | Power supply | 
| 31 (A) | + 15 | Power supply | 
| 32 (A) | ground | Grounding point G33T | 
| 23 (A) | ground | Grounding point G33T | 
| 25 (A) | Bus | P-bus | 
| 26 (A) | Bus | P-bus | 
| 35 (A) | Bus | P-bus | 
| 36 (A) | Bus | P-bus | 
 
   
    
   
   | Important | ||
| When handling the control module, it is important first to create a ground connection between yourself and for example the vehicle engine. Avoid touching the pins of the control module. | ||

 
     
		