Verify the electronic control module (ECM) calibration is correct. Check the calibration revision history found on QuickServe® Online for applicable fixes to the calibration stored in the ECM. If necessary, recalibrate the ECM.
High voltage on the 5 volt supply wire can be caused by a short circuit to a power supply, a damaged sensor, or a damaged ECM power supply.
Possible repairs:
1)Repair or replace the OEM harness.
2)Replace the ECM.