PDM Ground Circuit Inspection

■ Check short at ground terminal of PDM

IG "ON" & ENG "OFF".
Measure voltage between ESCL ground terminal of PDM and chassis ground.
(Measure the voltage while ESCL doesn't work.)

Specification: Approx. 0 V
Is the measured voltage within specifications?
YES
- Go to next 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

IG "ON" & ENG "OFF"
Disconnect the connectors of IPM, PDM, ESCL.
Measure voltage between ESCL ground terminal and chassis ground.
Specification: Approx. 0 V
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 ".