With SST-Engine Signal Monitor

HEATED OXYGEN SENSORS (FRONT & REAR)
Inspection
Using SST-(Monitor, Engine Signal)
1. Remove the engine control module (ECM).




2. Connect the special service tools (SST)s to the ECM.
3. Warm up the engine to normal operating temperature.







4. Measure the voltage at the ECM terminal 3D, 3H, 31 and 3M.




5. If not as specified, inspect following.
- Intake-air system
- Fuel system
- On-board diagnosis system
If these systems are OK, replace the heated oxygen sensor.

Tightening torque: 30-49 Nm (22-36 ft.lb.)