Scan Tester Procedure (Except California)

Check continuity of ground signal circuit to ECM. Ensure ignition is off. Disconnect O2 harness connector and ECM harness connector. Connect jumper wire between ECM harness connector terminal No. 9 (White wire) connector No. C50-1 and vehicle ground. See Fig 1 and Fig 2 . Using ohmmeter, check resistance between sensor harness connector terminal and vehicle ground. If continuity does not exist, inspect and repair circuit as needed.

Fig 1: Identifying ECM Connector (California)

Courtesy of HYUNDAI MOTOR CO.

Fig 2: Identifying ECM Connector (Federal)

Courtesy of HYUNDAI MOTOR CO.