OEM 2002 GMC Safari Engine Control Module

2002 GMC Safari Parts Questions & Experts Answers

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

  A: Through the service programming system (SPS) control modules can be programmed using the data link connector (DLC) that works with the same serial data circuit as diagnostic scan tools do for retrieving diagnostic trouble codes and displaying data. Control modules use electrically erasable programmable read only memory (EEPROM) for storing information from the vehicle identification number (VIN) and crankshaft variation learned position and software/calibrations identification numbers and control module security information and flash read only memory for its larger storage capacity and complete data replacement during programming. Installing the control module determines whether programming methods based on (Tech 2), (Tech 2) or (OBPA), (OBPA) can be used with the vehicle absent or present. The programming process requires a vehicle battery voltage between 12 and 16 volts and no charging system problems while all systems responsible for battery loading such as daytime running lights, hvac systems and engine cooling fans should be switched off. The tool demands the Ignition Switch to match the specified position and all connections starting from the rs-232 cable through the dlc need to stay securely in place. Disturbing tool harnesses during programming operations should be avoided to maintain system reliability. The control module needs to carry out re-learning procedures for fuel trim correction and idle air control (IAC) learned position and automatic transmission shift adapts since the powertrain behaves differently following programming. When replacing a control module the system requires additional service procedures including crankshaft variation calibration and engine oil reset parameters as well as idle calibration and inspection/maintenance system reset and vehicle theft check procedure and Throttle Position Sensor calibration.