Finishing the Aveo and FLD

This week in class we found the J1939 connector on the FLD. We also took the coolant temp sensor out and tested it. We took a lighter to it and watched as the resistance went down as the temp went up on the sensor. After that we put it back in the series 60. Don't forget the pipe dope and to plug the connector back in. In the other class we removed the thermostat out of the Aveo. First time i have seen that type of thermostat. It was weird!! then we tested it with a pan of water and a cutting torch. We recorded the data at the opening temp and closing temp. After that we put it back together and filled it with coolant.

ECMs and Thermostats

Why in the world is the drain plug for the radiator on a 2010 Chevy Aveo LT located at the very bottom on the side. Not just in a annoying place but behind some A/C lines and sits right behind the core support. So after fitting your hand into space about three inches wide you then have to put a 13mm wrench on it to break it loose. Well after that struggle the radiator can be trained and the thermostat can be removed from its housing. Make sure to spray down the bolts on the housing. Hate when manufacturers connect aluminum parts to cast iron parts with aluminum bolts. Welcome to snap city! ECMs oh the good and hard to find ECMs. You figure they would be mounted inside the cab or another location where they wouldn't be exposed to the elements. But nope not on a 1191 Freightliner FLD. Right inside the frame is where you can find it, covered with dirt and grease. Along side labeling the sensors and outputs, finding the J1939 wires can be a challenge in the dirt and grease. But my team and I did.

The basics of HVAC and electronic engine controls by Jacob Williams

This week in class we started on the basics of HVAC learning and electronic engine controls. During the engine control class we had to fine the ecu and label some important sensors. Unfortunately the ecu was not in the location we thought it was and we were not able to get on the computer to locate it before class ended. In the HVAC class my team and I worked on a 2010 Chevy Aveo Lt. We performed a leak test on the cooling system but did not realize we had to use the leak test dye so we still have to perform that. We also tested the pH level of the coolant and made sure the radiator cap relieved pressure at the right psi. The radiator cap was weird on this cat because it wasn't actually on the radiator but on the reservoir tank. Next week we get to finish our test and continue on our mission of greatness.