Signal Too Low. Intermittent Fault

Signal too low. Intermittent fault

Checking connector and wiring

Caution! Do not apply rust solvent spray or grease to the heated oxygen sensor (HO2S) connector.

Check heated oxygen sensor (HO2S) connector for contact resistance and oxidation according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults and loose connections according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults
Check signal cable (-) between heated oxygen sensor (HO2S) #5 and control module #A42 (#A42) and the cable for calibration current between heated oxygen sensor (HO2S) #2 and control module (HO2S) #A28 (#A28) for an intermittent open-circuit according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults
Check calibration current power cable between heated oxygen sensor (HO2S) #2 and control module #A28 (#A28) and power supply for pump current between heated oxygen sensor (HO2S) #6 and control module #A24 (#A24) for an intermittent short-circuit to each other according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.

Other information
- Connecting the breakout box/accessing the control module, see Connecting the breakout box, B5234T9, B5244T7 Connecting The Breakout Box.
- For information about signals, see Signal specification Signal Specifications.














Continue - Fault-tracing information

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Fault-tracing information




Information

Fault-tracing information
If the fault is intermittent, do not verify fault-tracing if the fault does not recur.
It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

Do you want to view the information again?

Yes - Attempt New Test

No - FAULT FOUND

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Attempt New Test - Checking connector and wiring

FAULT FOUND - DONE

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