Control Circuit Inspection

IG "OFF"
Disconnect Cooling fan module connector.
IG "ON" & ENG "OFF"
Measure signal waveform at terminal 2 of cooling fan module.
REFERENCE SIGNAL WAVEFORM:

Fig 1: Fan Module Connector Terminals Waveform Signal Reference On Scantool
Courtesy of HYUNDAI MOTOR CO.
Is the measured signal waveform normal?
YES
- If the problem is corrected after substituting with a known - good Cooling Fan module, replace it. If the problem is pending, check for proper operating after substituting with a known - good PCM. and then if the problem is corrected, replace PCM and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
NO
- Check that harness connected at engine compartment junction block is disconnected or not.
- Check the line between terminal 2 of Cooling Fan module harness connector and terminal 66 of PCM harness connector for open.
- Repair or replace as necessary and 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 to reuse the PCM on the others