Harness Inspection
- Disconnect EGR temperature sensor harness connector. Turn ignition on. Using DVOM, measure voltage between EGR temperature sensor harness connector terminal No. 1 and vehicle ground. See EGR TEMPERATURE SENSOR TERMINAL IDENTIFICATION table. Voltage should be 4.3-4.7 volts. If voltage is within specification, circuit is okay. If voltage is not within specification, turn ignition off.
- Disconnect ECM harness connector. Connect jumper wire between ECM harness connector terminal and vehicle ground. See EGR TEMPERATURE SENSOR TERMINAL IDENTIFICATION table.
- Using ohmmeter, check resistance between EGR temperature sensor harness connector terminal No. 1 and vehicle ground. If continuity does not exist, inspect and repair circuit as needed. If continuity exists, substitute ECM with known good unit and retest.
- Using ohmmeter, check resistance between EGR temperature sensor connector terminal No. 2 and vehicle ground. See EGR TEMPERATURE SENSOR TERMINAL IDENTIFICATION table. If continuity does not exist, inspect and repair circuit as needed.
EGR TEMPERATURE SENSOR TERMINAL IDENTIFICATION
| Application |
Wire Color |
Corresponding ECM Terminal No. |
| Power Supply Circuit |
| Terminal No. 1 |
| Sonata 4-Cyl. |
Yellow/Black |
22 |
| Sonata V6 |
Green/Blue |
14 |
| Ground Circuit |
| Terminal No. 2 |
| Sonata 4-Cyl. |
Black |
13 |
| Sonata V6 |
Black/White |
13 |