Initialization Test of O2 Sensors
Throttle by Cable, SmartLink Software
1. Connect computer interface cable to the module.
2. Turn ignition switch ON.
3. Link to the module.
4. Select ‘Monitor’ to begin monitoring.
5. Turn ignition switch OFF
6. Wait until a dialog displays….. “Monitor Stream Lost – Searching….”
7. Locate and watch AFR values in both Front and Rear cylinders.
8. Turn ignition switch ON.
9. Verify both AFR values now change to 22.05.
10. Verify that after several seconds both values change to 19.36
11. Start the engine.
12. Verify that after the engine starts, both Front and Rear AFR values become quickly changing values
(approximately AFR values of 11.00 – 15.00).
If the above conditions are displayed then the O2 sensors appear to be working normally.
**If either the FRONT or REAR or BOTH sensors do not meet the above initialization test, then an O2 Sensor
system fault is occurring.
**Proceed to investigate further.
Reference AFR readings while the engine is idling normal and stable
Reference Determine which is bad, O2 Sensor or O2 Harness
