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externalsensorinput

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Table of Contents

Available ECU inputs

Note that the following lists out all the available inputs on the 1G and 2G DSM ECUs. Most of these have special cases associated with them to be useful as a general purpose analog input. The most freely available inputs are the EGRTemp input on a 1G ECU and the RearO2 and MDP inputs on the 2G ECU. The rest have special cases to consider with them. Some may even require a buffer circuit to be driven properly, depending on which sensors is connected to which input.

Reference: ECU Wiring Docs

1G ECU

  • EGR Temp Input (ECU Pin 15)
  • IAT Input (ECU Pin 8) - Requires GM MAFT w/Ignore IAT/Baro selected.
  • Baro Input (ECU Pin 16) - Requires GM MAFT w/Ignore IAT/Baro selected.
  • Front O2 (ECU Pin 4) - Only usable when “Open Loop” option is selected.
  • Park/Neutral switch (ECU Pin 104) – Available on MT ONLY. Used exclusively for clutch cut input.

2G ECU

  • Rear O2 (ECU Pin 75)
  • MDP (ECU Pin 73)
  • Baro (ECU Pin 85) - Requires GM MAFT w/Ignore IAT/Baro selected. Has internal pull down resistor making it unsuitable for certain sensors (see work around).
  • IAT (ECU Pin 72) - Requires GM MAFT w/Ignore IAT/Baro selected.
  • Park/Neutral switch (ECU Pin 91) - Available on MT ONLY. Used exclusively for clutch cut input.
externalsensorinput.1201629293.txt.gz · Last modified: 2008/01/29 12:54 by twdorris