Checking components and wiring: Notes
CAUTION:
Do not apply rust solvent spray or grease to the heated oxygen sensor (HO2S) connector.
Check the signal cable (+) between heated oxygen sensor (HO2S) terminal #1 and control module terminal #A41 (#A41). Check the signal cable (-) between heated oxygen sensor (HO2S) terminal #5 and control module terminal #A42 (#A42). Check for a short-circuit to each other.
Check the power supply to heated oxygen sensor (HO2S) terminal #3 and the signal cable between heated oxygen sensor (HO2S) terminal #4 and control module terminal #A18 (#A18). Check for a short-circuit to the other cables for the heated oxygen sensor (HO2S).
Try a new heated oxygen sensor (HO2S) if the wiring is OK.
Remedy as necessary.
Other information
- To connect the breakout box / access the control module, see Connecting the breakout box
- To access or replace the heated oxygen sensor (HO2S):
- For B5xx4T -2004, see Heated oxygen sensors (HO2S), replacing
- For B5xx4T 2005-, see Heated oxygen sensor (HO2S), replacing .
- For information about signals:
- For 5 cylinder turbocharged engines -2001, see Signal specification
- For 5 cylinder turbocharged engines 2002, see Signal specification
- For B5254T2 -2004, see Signal description
- For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see SIGNAL SPECIFICATION (B5204T5, B5234T3, B5234T7 AND B5244T3 -2004)
- For B5254T4 2004, see SIGNAL SPECIFICATION (B5254T4 2004)
- For 5 cylinder turbocharged engines 2005-, see Signal specification .
- See Checking wiring and terminals .
- Continue
Refer to Verification