h16: Check HEGO Circuit For Short to Ground
| Steps | _Key Off
_Breakout box installed, processor disconnected _HEGO disconnected _DVOM on 200,000 ohm scale _Measure resistance between Test Pin 29 and Test Pin 40 at the breakout box _For vehicles with dual HEGO also measure resistance between Test Pin 43 and Test Pin 40 at the breakout box. |
| Result | Is resistance greater than 10,000 ohms? |
| Direction | YES
GO to Continue NO Remove breakout box. Reconnect processor and HEGO sensor. Service short circuit. Rerun Quick Test. |
| Component | Heated Exhaust Gas Oxygen Sensor |
| Description | The HEGO sensor supplies the EEC with a signal that indicates a rich or lean condition during engine operation. |
| Location | Threaded into the turbo outlet elbow |
| Wire Colors | Dark Green with Purple stripe
Grey with Yellow stripe Black with Light Green stripe |
| Image |   "> |