Input Test Procedure

Enter diagnostics. See ENTERING DIAGNOSTIC MODE . Depress "LO" button on CCP to by-pass trouble codes. This Will place diagnostic service mode in the system select level. Depress "LO" button until desired system is displayed. Select that system by depressing the "HI" button. After desired system is selected, "DATA" will be displayed. Depressing "LO" button will place system in the "INPUT" test level. Select that test level by depressing the "HI" button.
When troubleshooting a malfunction, the ECM, BCM or Lighting input display can be used to determine if switched inputs can be properly interpreted. When one of various input tests is selected, the state of that device is displayed as "HI" or "LO".
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.
The "X" will only appear once per selected input, although the "Hi/Lo" indication will continue to change as input changes. Some tests are momentary and the "X" can be used as an indication of a change.

ECM INPUT DISPLAY PARAMETERS