Checking Components And Wiring
CAUTION:
Do not apply rust solvent spray or grease to the heated oxygen sensor (HO2S) connector.
- Check the heated oxygen sensor (HO2S) connector. Check for contact resistance and oxidation.
Check the cable for calibration current between heated oxygen sensor (HO2S) terminal #2 and engine control module (ECM) terminal #A69 (#B9). Check the cable for pump current between heated oxygen sensor (HO2S) terminal #6 and engine control module (ECM) terminal #A25 (#A25). Check for a short-circuit to each other.
Check the cable for an open-circuit.
Check between:
- Heated oxygen sensor (HO2S) terminal #5 and engine control module (ECM) terminal #A44 (#A44)
- Heated oxygen sensor (HO2S) terminal #2 and engine control module (ECM) terminal #A69 (#B9).
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