Diagnosis Procedure: Notes

WARNING: This page is about a different car, the 2019 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.

The specification (SP) value indicated at "Reference" of "Data Monitor" mode indicates the tolerance of the ECM input/output valve when the engine control system operates normally.

NOTE: The SP value is indicated when "DISPLAY TYPE" is "Line Graph".

When the indicated value on "Data Monitor" mode is within the SP value, the engine control system is confirmed OK. When the indicated value on "Data Monitor" mode is not within the SP value, the engine control system may have one or more malfunctions.

The SP value is used to detect malfunctions that may affect the engine control system, but will not illuminate the MIL.

The SP value will be displayed for the following three items:

B/FUEL SCHDL (The fuel injection pulse width programmed into ECM prior to any learned on board correction)
A/F ALPHA-B1/B2 (The mean value of air-fuel ratio feedback correction factor per cycle)
MASS AIR FLOW SENSOR (Hz) (The frequency of the mass air flow sensor)