October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.
Engine Controls Schematics
WARNING: This page is about a different car, the 2005 Saturn Ion 3, 2005 Saturn Ion 2, and 2005 Saturn Ion 1. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Power, Ground, MIL, and Serial Data Schematics
Courtesy of GENERAL MOTORS CORP.
Fig 2: Engine Data Sensors - 5-Volt and Low Reference Bussing Schematics
Courtesy of GENERAL MOTORS CORP.
Fig 3: Engine Data Sensors - Pressure, Temperature, and MAF/IAT Schematics
Courtesy of GENERAL MOTORS CORP.
Fig 4: Engine Data Sensors Schematics - HO2S
Courtesy of GENERAL MOTORS CORP.
Fig 5: Engine Data Sensors - APP and TAC Schematics