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Input Display Procedure

  1. When troubleshooting a malfunction, the ECM, BCM, or IPCC input display can be used to determine if switched inputs can be properly interpreted. When one of various input test is selected, the state of that device is displayed as "HI" or "LO".
  2. In general, "HI" and "LO" refer to input terminal voltage for that circuit. The display also indicates if input changed state so that a technician can activate or deactivate any listed device and return to display to see if it changed state. If a change of state occurred, an "X" will appear next to "Hi/Lo" indicator, otherwise a "O" will remain displayed.
  3. The "X" will only appear once per selected input, although the "Hi/Lo" indication will continue to change as input changes. Some test are momentary and the "X" can be used as an indication of a change.
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