Checking connectors and wiring
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 for loose connections.
Check the signal cable (-) between heated oxygen sensor (HO2S) terminal #5 and control module terminal #A42 (#A42). Check the cable for calibration current between heated oxygen sensor (HO2S) terminal #2 and control module terminal #A28 (#A28). Check for an intermittent open-circuit.
Check the cable for calibration current between heated oxygen sensor (HO2S) terminal #2 and control module terminal #A28 (#A28). Check the cable for pump current between heated oxygen sensor (HO2S) terminal #6 and control module terminal #A24 (#A24). Check for an intermittent short-circuit to each other.
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 the C70, S70, V70 -2000 and V70XC, see Adapter wiring switch, replacing . For other models, see Heated oxygen sensor (HO2S), replacing
- For information about signals on 5 cylinder engines, see Signal specification
- For information about signals on 6 cylinder engines:
- For 6 cylinder engines -2001, see Signal specification
- For 6 cylinder engines 2002-, see Signal specification
- For 6 cylinder engines -2004, see Signal specification
- For 6 cylinder engines 2005-, see Signal specification .
- See Contents .
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Refer to Information