How do electronics assist maintenance technicians? How do the electronic fault finding capabilities work?
The World Transmission electronic control system is programmed to inform the operator of a problem with the transmission system and automatically take action to protect the operator, vehicle, and transmission. When the Electronic Control Unit (ECU) detects a problem condition, the ECU restricts shifting, turns on the CHECK TRANS light on the instrument panel, and registers a diagnostic code. Diagnostic codes are numerical indications relating to a malfunction in transmission operation. Each code consists of a two-digit main code and a two-digit subcode. These codes are logged in a list in the ECU memory with the most severe or otherwise most recent code listed first. A maximum of five codes (numbered d1-d5) may be listed in memory at one time. Diagnostic codes are accessed through the pushbutton and lever shift selectors or the diagnostic data reader. The procedure to retrieve diagnostic codes is listed in the transmission operator’s manual. A maintenance technician will use these code
