Front Heated Oxygen Sensor Heater

DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE

DIAGNOSTIC TROUBLE CODE DETECTING CONDITION
WITH CONSULT
1) Turn ignition switch "ON" and select "DATA MONITOR" mode with CONSULT.
2) Start engine and run it for at least 35 seconds at idle speed.

OR

WITH GST
1) Start engine and run it for at least 35 seconds at idle speed.
2) Select "MODE 3" with GST.

OR

WITH NO TOOLS
1) Start engine and run it for at least 35 seconds at idle speed.
2) Turn ignition switch "OFF", wait at least 5 seconds and then turn "ON".
3) Perform "Diagnostic Test Mode II" (Self-diagnostic results) with ECM.




WIRING DIAGRAM




DIAGNOSTIC PROCEDURE

COMPONENT INSPECTION
Front heated oxygen sensor heater




Check resistance between terminals (1) and (3).

Resistance: 3.3 - 6.3 Ohms at 25°C (77°F)

If NG, replace front heated oxygen sensor.

CAUTION:
- Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a hard surface such as a concrete floor; use a new one.