TF. MFI #7 Mass Air Flow (MAF) Sensor Signal Too High

TF. MFI#7

MFI#7 Mass air flow (MAF) sensor signal too high




Fault message conditions:
A fault message will be logged when voltage is above 6 V

Causes of fault:
Short circuit in the wiring between MFI#7 and the MAF sensor.
Poor connection of the MAF sensor to GND.
Short circuit in the MAF sensor.

Fault symptoms:
The engine runs rough. Uneven idling.

TF1




Monitor Test
- Start the engine.
- Check the load signal in Monitor Test.
Load should be approx. 2.3 V when the engine is unloaded and idling.

If this value is OK
Intermittent fault.
^ Check the MAF sensor GND point and its wiring for loose contacts in accordance with NA5. NA. Checking the Wiring
^ Check the wiring between MFI#7 and the MAF sensor for intermittent shorting in accordance with NA4. NA. Checking the Wiring

If the reading is incorrect
^ check the MAF sensor GND point and its wiring for breaks in accordance with NA2. NA. Checking the Wiring
^ Check the wiring between MFI#7 and the MAF sensor for short circuits in accordance with NA4. NA. Checking the Wiring