Mitsubishi ECLIPSE Technical Information Manual

1-44 ENGINE <NON-TURBO> - Control Svstem
To control air/fuel ratio feedback, the PCM uses
short term correction and long term memory. Before
the PCM can alter the programmed injector pulse
width, it must enter closed loop operation. The re-
quirements for closed loop operation are listed be-
low:
l AN timers have timed out -following the START
to RUN transfer (The length of these timers
varies with engine temperature)
l Engine temperature exceeds 35°F
l OS sensor is in the readv mode
35°F - 41 sec.
50°F - 35 sec.
70°F - 22 sec.
13) are used only during idle. Each cell represents
167°F - 11 sec.
d
a manifold pressure and rpm range and can be
Once in the closed loop control, the feedback sys-
tems begin to operate. Short term memory works
with the long term memory, which is broken down
accessed with the MUT-II diagnostic scan tool.
into 14 different cells. Two of these cells (12 and
Long Term Memory Cells
ABOVE
2048
RPM
BELOW
Map Voltage
1
3
5
Purge
Free*
0
2
Purge
Free*
4
7 9
T
6
11
10
1.38
2.0
2.64
3.26
3.9
13
Idle
Neutral
Manual
Transaxle
Purge
Free*
*PCM disables the canister purge function in these cells to gather data used for purge control and diagnostics.
J
For example:
If the PCM were in cell 3, the MAP voltage must
be between 1.38 and 2.OV and engine rpm must
be greater than 2048. This is the cell that the control
system would update.

Mitsubishi ECLIPSE Specifications

General

Brand	Mitsubishi
Model	ECLIPSE
Category	Automobile
Language	English