PDM Ground Circuit Inspection

Check short at ground terminal of PDM
1. IG "ON" & ENG "OFF".
2. Measure voltage between ESCL ground terminal of PDM and chassis ground.
  (Measure the voltage while ESCL doesn't work.)
  
  Specification: Approx. 0 V
  
  Fig 1: Measuring Voltage Between ESCL Power Terminal Of PDM And Chassis Ground
  Courtesy of HYUNDAI MOTOR CO.
3. Is the measured voltage within specifications?
  YES
  - Go to "Check short to power on ESCL GND circuit " procedure.
  NO
  - Check open or short on the ground circuit between PDM and ESCL.
    Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR "
Check short to power on ESCL GND circuit
1. IG "ON" & ENG "OFF"
2. Disconnect the connectors of IPM, PDM, ESCL.
3. Measure voltage between ESCL ground terminal and chassis ground.
  Specification: Approx. 0 V
  
  Fig 2: Measure Resistance Between ESCL Power Terminal And Chassis Ground
  Courtesy of HYUNDAI MOTOR CO.
4. Is the measured voltage within specifications?
  YES
  - Substitute with a known-good ESCL and check for proper operation.
    If the problem is corrected, replace the unit and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
  - Substitute with a known-good PDM and check for proper operation.
    If the problem is corrected, replace the unit and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
  NO
  - Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR ".