Ground Circuit Inspection

Ignition "OFF"
Disconnect ECT sensor connector.
Ignition "ON" & Engine "OFF"
Measure voltage or resistance between terminal 2 of sensor harness connector and chassis ground.
Specification: below 0.5V or below 1Ω

Fig 1: Measuring Resistance Between Terminal 2 Of Sensor Harness Connector And Chassis Ground
Courtesy of HYUNDAI MOTOR CO.
Is measure voltage or resistance within Specification?
YES
- Go to "COMPONENT INSPECTION " procedure.
NO
- Open circuit between ECTS harness connector and PCM harness connector.
- Open circuit between PCM harness connector and chassis ground.
- Repair as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure
  NOTE:
  In case, when measuring resistance of ground circuit, the resistance is over 1 ohm.
  - Possible cause: Short circuit between ECM ground point and PCM terminal 35