Types Of Emcc Logic; Emcc Fail-Safe; Emcc Break-In Procedure; Emcc Inhibits - Mitsubishi Eclipse Technical Information Manual

Types of EMCC Logic

No EMCC Logic -This is when the torque converter
clutch is off.
Partial EMCC Logic - This logic will modulate the
converter clutch application. Partial EMCC operation
Full EMCC Logic - This increases the LR/CC sole-
noid duty-cycle to full "on", after partial EMCC control
brings the engine speed to within the desired slip
Gradual to No EMCC from Full or Partial Logic -
This logic is designed to soften the change from
Full or Partial EMCC to No EMCC, at mid-throttle,

EMCC Fail-safe

A malfunction of the EMCC system is detected from
a lengthy partial EMCC operation near the maximum
allowable duty-cycle, except at heavy throttle. If a
diagnostic trouble code is reported, the TCM will

EMCC Break-in Procedure

With the vehicles odometer reading from 0 to 500
miles, there will be no torque converter EMCC. From
500 to 1500 miles, the TCM will gradually decrease
EMCC from a 200 rpm slip to a 60 rpm slip. When
vehicle mileage is above the EMCC break-in period
and a malfunction occurs with the torque converter,

EMCC Inhibits

The TCM is provided with EMCC inhibits to prevent
EMCC from occurring under specific conditions. The
following are times when EMCC will not occur.
Transaxle Temperature - When the transaxle tem-
perature range is cold or supercold, EMCC is inhib-
ited (kept from occurring). In the event of a CCD
Bus failure, -3 degrees F. is substituted for the initial
Brake Signal (on) - This will cancel and prevent
EMCC as long as a brake signal is "on". If a bus
failure occurs, the "brake on" signal is not received,
and EMCC is still possible.
Solenoid Switch Valve - If a solenoid switch valve
(SSV) malfunction is detected, EMCC will not occur.
A SSV diagnostic trouble code will only be stored
EMCC Fault - Any reported EMCC diagnostic
trouble code will prevent any type of EMCC from
occurring.
POWER TRAIN
- Automatic Transaxle
is maintained until full EMCC logic is called for and
actuated.
range of transaxle input speed relative to engine
rpm (crankshaft speed).
by gradually decreasing the LFUCC solenoid duty-
cycle.
not operate the torque converter clutch. It will remain
unapplied until the next restart. Diagnostic trouble
code 38 will be stored in memory.
the new replacement torque converter must go
through the same EMCC break-in procedure. The
TCM must be re-programmed to allow for (restart)
the break-in period. To do this, use the scan tool
(MUT-II).
temperature. This initial value is incremented up
to normal engine operating temperature based on
engine running time. This will result in delayed
EMCC operation under start-up conditions.
Throttle Position Sensor - Any throttle value less
than 2 or 3 degrees (closed throttle) will cancel
EMCC. If a throttle position sensor failure is identified
by the TCM, EMCC will not occur.
if the transaxle operating temperature range is hot,
and the malfunction occurs at least three times.
The fault counter is reset during the start routine.