Signal Missing. Intermittent Fault

Checking Cables And Terminals
- Check engine control module (ECM) and engine speed (RPM) sensor connectors for loose connections and contact resistance and oxidation.
- Check cable between engine speed sensor terminal 2 and control module # A6 for an intermittent open-circuit.
- Check cable between engine speed sensor terminal 1 and engine control module # A20 for an intermittent short-circuit to supply voltage, intermittent short-circuit to ground and an intermittent open-circuit.

Fault-tracing Information
For intermittent faults fault-tracing is not followed by a verification because the fault is not present at this moment.

- Do you want to repeat fault-tracing?

Yes:
^ Return to Checking Cables And Terminals section above.

No:
^ Operation done.