Lexus - Toyota OBD1 Diagnostic Trouble Code
31
Volume Air Flow Meter Signal
Mass Air Flow Signal
Vacuum Sensor Signal
Area
Open or short in volume air flow meter(AFM) circuit
Volume air flow meter (AFM)
Manifold absolute pressure(MAP) sensor or circuit
Engine Control Module(ECM)
Diagnosis
Open or short circuit in manifold pressure sensor signal (PIM).
At idling, open or short detected continuously for 0.5 second or more in volume air flow meter circuit.
* Open – VC
* Short – VC – E2