OEM 2002 Chevrolet Suburban 1500 Engine Control Module

2002 Chevrolet Suburban 1500 Engine Control Module Parts and Q&A

• Q: What is the purpose of the Service Programming System (SPS) in programming the Engine Control Module on 2002 Chevrolet Suburban 1500?

  A: The service programming system (SPS) lets technicians program control modules by using the data link connector (DLC) while they access diagnostic information that dtcs and data through the same serial data circuit as scanning tools. A control module maintains two memory types including electrically erasable programmable read only memory (EEPROM) that stores information like vehicle identification number (VIN) and crankshaft variation learned position and control module security data among others and flash read only memory for larger storage capacity that programmer completely replaces during programming operations. Programming with tech 2 uses remote and pass thru methods while obpa enables remote and off-board pass thru methods but needs the control module in place according to the specified protocols. The vehicle demands a battery voltage range from 12 to 16 volts with no charging problems before programming and all systems loading the battery must be disabled including daytime running lights and hvac systems and engine cooling fans. A programming session needs the Ignition Switch set precisely as the scan tool indicates and requires firm rs-232 cable connections and all dlc connections to remain stable. Tool harness disturbance during programming should be avoided to prevent failures and protect the hardware. The powertrain modifications from programming cause the control module to perform learn procedures for fuel trim correction along with idle air control (IAC) learned position and automatic transmission shift adapts. Replacement of a control module will require service personnel to perform a crankshaft variation learn procedure together with engine oil life reset procedure and idle learn procedure while following the inspection/maintenance complete system set procedure, vehicle theft deterrent password learn procedure, and throttle position (TP) sensor learn procedure.