Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
PDM Ground Circuit Inspection
■ Check short at power terminal of PDM
- IG "ON" & ENG "OFF".
- Measure voltage between ESCL power terminal of PDM and chassis ground.
(Measure the voltage while ESCL doesn't work.)
Specification: Approx. 12 V
- Is the measured voltage within specifications?
YES
- Go to next procedure.
NO
- Check open or short on the power circuit between PDM and ESCL.
Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR "
■ Check short to ground on ESCL power circuit
- IG "ON" & ENG "OFF"
- Disconnect the connectors of IPM, PDM, ESCL.
- Measure resistance between ESCL power terminal and chassis ground.
Specification: ∞ Ω
- 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 ".
- Substitute with a known - good ESCL and check for proper operation.
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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