Signal Too Low. Intermittent Fault

Signal too low. Intermittent fault

EFI-121 Mass air flow (MAF) sensor

Checking cables and terminals




- Check that the fresh air intake is intact and properly connected.
- Check cable between main relay (2/32) terminal 3 and mass air flow (MAF) sensor terminal 3 for an intermittent open-circuit according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
- Check cable between mass air flow (MAF) sensor terminal 4 and engine control module (ECM) #A4 for an intermittent open-circuit according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults , and an intermittent short-circuit to ground according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.





Continue - Fault-tracing information
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 cables and terminals

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