OEM 2002 Chevrolet Astro Engine Control Module

2002 Chevrolet Astro Parts Questions & Experts Answers

• Q: What is the purpose of the Service Programming System (SPS) in programming an Engine Control Module on 2002 Chevrolet Astro?

  A: A technician can use the service programming system (SPS) to program control modules by connecting through the data link connector (DLC) while using the same serial data circuit that scan tools use for dtc retrieval and data display. The control module combines electrically erasable programmable read only memory (EEPROM) storage for learned data including vehicle identification number (VIN) together with crankshaft variation learned position, software/calibrations identification numbers and control module security information while using flash read only memory for its higher storage capacity to store total programming information. The programming process involves remote programming using (Tech 2) and pass thru programming with (Tech 2) as well as off-board remote programming with (OBPA) and off-board pass thru programming with (OBPA) which need the control module present in the vehicle or absent for each particular approach. Programming must start only after verifying that the control module contains no current identical software/calibration packages and that the vehicle system voltage ranges between 12 and 16 volts with no charging system problems and all battery loads disabled. Maintain secure connections of the rs-232 cable and dlc as well as tool harness stability to minimize programming failures. After programming, the powertrain may operate differently, requiring the control module to re-learn values such as fuel trim correction, idle air control (IAC) learned position, and automatic transmission shift adapts, while additional service procedures may be necessary if the control module is replaced, including the crankshaft variation learn procedure, engine oil life reset, idle learn procedure, complete system set procedure, vehicle theft deterrent password learn procedure, and throttle position (TP) sensor learn procedure.