Innova 3150b update software#

The electronic control module electronically controlled vital parts of the engine and transmission through the adjustment of actuators and solenoids. On early vehicles built in the 1980's, by plugging in the scan tool connector to a connector located under the vehicle's dashboard, the scan tool could communicate with the vehicle electronic control module.

Innova 3150b update software#

Just after GM started using in-house scan tools, most other manufacturers followed suit and developed their own scanners and software that resided in the vehicle electronic control module (ECM). A particular fault might be 'no signal from the crankshaft position sensor'. The fault code was a short series of numbers and letters (P1021) that corresponded to a fault mode within the engine or transmission. The basis of early electronic vehicle powertrain diagnostics strategy was the fault code. The automotive industry continually improved the scan tool every year and then required dealership technicians to use scan tools to diagnose problems within the powertrain.

These scan tools generally used a blinking light ofraudible sound to alert the user to a problem. These scan tools were developed to assist the GM technicians and engineers in the factory to diagnose engine related problems with cars just assembled on the assembly line. Automotive OBD-I Diagnostic ScanTools were developed in the 1970's by technicians at General Motors Corporation.