12-26 FI SYSTEM DIAGNOSIS
Example of trouble
Three data; value 1 (past data 1), value 2 (past data 2) and value 3 (current data 3); can be made in compar-
ison by showing them in the graph. Read the change of value by comparing the current data to the past data
that have been saved under the same condition, then you may determine how changes have occurred with
the pass of time and identify what problem is currently occurring.
With DTC not output, if the intake negative pressure is found to be higher than the data saved previously,
the possible cause may probably lie in the hardware side such as O-ring damage, etc.
Abnormal value of manifold absolute pressure
No DTC output
