Checking wiring and components
Do not apply rust solvent spray or grease to the heated oxygen sensor (HO2S) connector.
Check signal cable (+) between control module #A42 (#A42) and heated oxygen sensor (HO2S) connector terminal #4 for an open-circuit according to Open-circuit, permanent faults and for a short-circuit to ground according to Short-circuit to ground, permanent faults .
HINT: With the ignition on and heated oxygen sensor (HO2S) connector disconnected, the voltage between terminal #4 and ground terminal should be approximately 0.1V.
Check signal cable (-) between control module #A41 (#A41) and heated oxygen sensor (HO2S) connector terminal 3 for an open-circuit according to Open-circuit, permanent faults and for a short-circuit to ground according to Short-circuit to ground, permanent faults .
If wiring is OK, try another heated oxygen sensor (HO2S).
Remedy as necessary.
Other information
- To connect the breakout box, see connecting the breakout box
- To access/replace the control module, see Replacing the engine control module (ECM)
- To access/replace the heated oxygen sensor (HO2S), see Heated oxygen sensor (HO2S), replacing
- For information about signals, see Signal specification .
- Continue
Refer to Verification