Power Circuit Inspection

Check Voltage
1. Ignition "OFF"
2. Disconnect PCM connector
3. Ignition "ON" & Engine "OFF"
4. Measure voltage between memory power terminal of PCM harness connector and chassis ground.
  Specification : B+
5. Is the measured voltage within specifications?
  YES:
  - Substitute with a known - good PCM and check for proper operation.
  - If the problem is corrected, replace PCM and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
  NO:
  - Check for open or short to ground in harness.
  - Check whether fuse is installed or blown off.
  - Repair or replace as necessary and then, go to "VERIFICATION OF VEHICLE REPAIR " procedure.
  NOTE: There is a memory reset function on scantool that can erase optional parts automatically detected and memorized by PCM. After testing PCM on the vehicle, use this function before reusing the PCM