Checking The Components And Wiring
CAUTION:
Do not apply rust solvent spray or grease to the heated oxygen sensor (HO2S) connector.
Check the power cable between the engine control module (ECM) and heated oxygen sensor (HO2S) connector terminal #3. Check for a short-circuit to the other signal cables for the heated oxygen sensor (HO2S).
Check the ground lead between engine control module (ECM) terminals #A70 (#B10) and heated oxygen sensor (HO2S) connector terminal #4. Check for a short-circuit to the other signal cables for the heated oxygen sensor (HO2S).
Try a new heated oxygen sensor (HO2S) if the wiring is OK.
Remedy as necessary.
Other information
- see CONNECTING THE BREAKOUT BOX
- For 5 cylinder turbocharged engines -2004, see SIGNAL DESCRIPTION
- For 5 cylinder turbocharged engines 2005-, see SIGNAL SPECIFICATION .
- For 6 cylinder engines -2004, see SIGNAL SPECIFICATION
- For 6 cylinder engines 2005-, see SIGNAL SPECIFICATION .
- For B5xx4T, see HEATED OXYGEN SENSOR (HO2S), REPLACING
- For B6xx4T, see HEATED OXYGEN SENSOR (HO2S), REPLACING .
- see CHECKING WIRING AND TERMINALS
- Continue
Refer to VERIFICATION