Harness Inspection Procedures

Measure the power supply voltage of the heated oxygen sensor.

Fig 1: Measuring Power Supply Voltage Of Heated Oxygen Sensor
Courtesy of HYUNDAI MOTOR CO.
- Connector: Disconnected
- Ignition switch: ON
- Voltage (V): Battery voltage
OK : Go to step 2

NG : Repair the harness.
Check for open-circuit, or a short-circuit to ground between the ECM and the oxygen sensor.

Fig 2: Checking Short-Circuit To Ground Between ECM And Oxygen Sensor
Courtesy of HYUNDAI MOTOR CO.
- Oxygen sensor connector: Disconnected
- ECM connector: Disconnected
OK: Go to step 3

NG : Repair the harness.
Check for continuity of the ground circuit.

Fig 3: Checking Continuity Of Ground Circuit
Courtesy of HYUNDAI MOTOR CO.
- Connector: Disconnected
OK : END

NG : Repair the harness.