OEM 2002 Chevrolet Trailblazer Engine Control Module

2002 Chevrolet Trailblazer Parts Questions & Experts Answers

• Q: What are the key considerations for programming an Engine Control Module with the Service Programming System (SPS) on 2002 Chevrolet Trailblazer?

  A: Service programming system (SPS) lets technicians access control module programming through the data link connector (DLC) while using the same serial data system which enables dtc retrieval and data display. The control module features eeprom for storing learned data including vin and axle position memorization and crankshaft variations while using flash read only memory for extensive programming purposes by overwriting contents with fresh information during the steps. The programming methods for control modules include remote programming through the tech 2 (Tech 2), pass thru programming with the tech 2 (Tech 2), and off-board remote programming through off-board programming adapter (OBPA) and also off-board pass thru programming with the tech 2 (OBPA). Begin programming only after checking that the control module uses different software/calibration and when vehicle power voltage ranges from 12 to 16 volts and the charging system functions correctly and all tool connections such as the rs-232 cable and the dlc connection remain secure. All battery-draining systems like daytime running lights (DRL) and hvac need to be disabled before starting the procedure and maintaining the ignition switch at its proper position. Programming the powertrain can cause its operation to change following completion which forces the control module to reconnect values including fuel trim correction along with idle air control position. The replacement of a control module demands various follow-up service procedures which include crankshaft variation learning and engine oil lifetime reset as well as idle learning and complete system programming and vehicle theft deterrent password re-setting and Throttle Position Sensor learning.