MITSUBISHI COLT 2006 Service Repair Manual

CVT
CONTINUOUSLY VARIABLE TRANSMISSION (CVT)23-3
ELECTRONIC CONTROL SYSTEM
EEPROM
M2231012000024
Because EEPROM has been used, even if the bat-
tery terminals or control unit connectors are discon-
nected, the necessary learned values are stored in
the engine-CVT-ECU to prevent a loss of shift qual
-
ity. (Initialisation is available by M.U.T.-III).
CONTROLLER AREA NETWORK (CAN)
COMMUNICATION
M2231017000018
CAN* communication has been adopted for commu-
nication with other ECUs in order to decrease the
number of wires and ensure information transmis
-
sion. For CVT control, the engine-CVT-ECU receives
the following signals.
CAN COMMUNICATION INPUT SIGNAL TABLE
Input signalTransmitter ECU
Average vehicle speed signal from drive wheelsABS-ECU
Motor current signalEPS-ECU
EPS warning lamp illumination request signal
Compressor signalMeter and A/C-ECU
NOTE: *: For more information about CAN (Control-
ler Area Network), refer to GROUP 54C P.54C-2.
RATIO PATTERN
M2231013000061
AC403740
AE
Engine speed
(r/min)
Vehicle speed (km/h)
0
100 150
50
1,000 2,000 4,000
3,000 5,000
7,000
6,000
OD
LOW
Accelerator
fully closed, 20% 40%
Accelerator
fully open
60%80%

CVT
CONTINUOUSLY VARIABLE TRANSMISSION (CVT)23-4
DIAGNOSIS CLASSIFICATION TABLE
M2231015000056
ItemDiagnosisData listActuator
test
Code No.Trouble symptomsItem No.Display
Crank angle sensor−−01r/min−
CVT fluid temperature sensor15Open circuit08°C−
16Short circuit
Line pressure sensor18Open circuit09MPa−
19Short circuit
Turbine speed sensor22Open circuit02r/min−
Primary speed sensor23Open circuit03r/min−
26System failure
Secondary speed sensor24Open circuit04r/min−
25System failure
Accelerator pedal position sensor (APS)−−06mV−
Primary pressure sensor27Open circuit11MPa−
28Short circuit
Gear ratio−−12Displays the
gear ratio.−
Line pressure control solenoid valve31Open circuit/short
circuit 16%01
Shift control solenoid valve32Open circuit15%02
36Short circuit
Damper clutch control solenoid valve33Open circuit14%03
37Short circuit
Clutch pressure control solenoid valve34Open circuit17%04
38Short circuit
Shift system42System failure−−−
Damper clutch system44System failure10r/min−
45
Clutch system46System failure−−−
48
Inhibitor switch51Open circuit26P/R/N/D/Ds/L−
52Short circuit
Stop lamp switch53Open circuit33ON/OFF−
54Short circuit
Battery voltage−−24V−
CVT control relay56Open circuit25V11
Steel belt system59System failure−−−
Line pressure system57System failure−−−
71
72

CVT
CONTINUOUSLY VARIABLE TRANSMISSION (CVT)23-5
ATF WARMER (ATF COOLER)
M2230000600082
AC403052AC
AT F
Engine coolant
Sectional view
ATF Warmer
(ATF Cooler)
Thermo valve
AC403006
CVT CVT CVT
Thermostat
Thermo
valve
ATF warmer (ATF cooler)ATF warmer (ATF cooler)
: Engine coolant
: AT F
85˚C or more>
Engine coolant flows through
all the sections.
75 - 85˚C>
Engine coolant flows through
the heater and the ATF warmer.
75˚C or less>
Engine coolant flows through
the heater only.
AC
: Valve open
: Valve closed
Thermostat
Thermo
valve
ATF warmer (ATF cooler)Thermo
valve
Thermostat
Radiator
Engine Heater
Radiator Engine Heater
Radiator
Engine Heater
The A TF warme r (A TF cooler) is adop ted. (th e A TF
cooler in
corpo r ating the rad i ator is n o t ado pted)
At the st art of runn ing, th e tempe r ature of th e engine
coolant rises earlier tha
n that of the A T F . The A TF
war
m er ut ilizes this ch aract e ristic to raise the A TF
tempe
r ature a s ea rly a s po ssible to an a ppropriate
leve
l (70 - 80
°C). It also contro ls fluid temperature st ably and reduces A TF agit a tion resist ance to
imp r ove f uel consump t ion ra tio.
In addition
, a the r mo-valve has bee n adop ted to
restrict the eng
ine coolan t supply to the A TF warmer
(A
TF coole r) until the engine co olan t temperature
reach
e s th e appro p riat e temperature when low tem
-
perature st art in winter , giving the priority to th e heat-
ing pe rformance .

TRANSMISSION CONTROL
CONTINUOUSLY VARIABLE TRANSMISSION (CVT)23-6
TRANSMISSION CONTROL
GENERAL INFORMATIONM2232000100447
•A smart shift type selector lever has been
adopted in order to facilitate walkthrough
between the seats.
•A gun grip type selector lever knob has been
adopted for better operation and easier visual
recognition of the switches arranged in the centre
panel.
•The selector lever assembly has been a single
unit made by aluminium die casting for better
accuracy and fewer parts, resulting in the light
-
weight and compact structure.
•The selector lever has been designed to be com-
pact and appropriately configured not to interfere
with the energy absorbing mechanism on the
steering column upon impact of the vehicle.
•In order to prevent abrupt start by erroneous
operation of selector lever, a CVT erroneous
operation prevention mechanism (the shiftlock
mechanism and key interlock mechanism) has
been adopted.
COMPONENT VIEW
AC206842
AC206864
AC207638
AB
P R
ND
Ds
L
Inhibitor switch Transmission
control cable
Selector lever
assembly

TRANSMISSION CONTROL
CONTINUOUSLY VARIABLE TRANSMISSION (CVT)23-7
SELECTOR LEVER ASSEMBLY
M2232002000190
AC206896AC206898
AC206897AC206899
AC207644AB
Selector lever
(P position)
Push button
Lock cam
A
Detent pin
Front of vehicles
Selector lever
(except for P position)
Detent pin
Detent block
Operation
1.Whe n the sele ctor leve r is in th e P positio n, the
det ent pin is enga ged with the lock cam. Whe n
the push button on the selecto r lever is pressed ,
the detent pin moves in the d i rection A as illu s
-
trated in the figure to rot a te the lock cam.
2.Whe n the d e tent p i n rot a te s the lock cam t o dis-
engage, th e se lector lever can go over the pro-
truding p a rt of the d e tent b l ock. Th is e nables
sh
if ting the selector lever .

TRANSMISSION CONTROL
CONTINUOUSLY VARIABLE TRANSMISSION (CVT)23-8
CVT ERRONEOUS OPERATION PREVENTION MECHANISMS
M2232003000104
SHIFT LOCK MECHANISM
Only when the following two conditions are satisfied,
the selector lever can be shifted from the P position
to another position:•When the brake pedal is depressed
•When the ignition key is in other than the LOCK
(OFF) position
When the brake pedal is not depressed
AC206902
AB
Brake pedal
Shiftlock cable
Stopper
Lever
Rod
Lock cam
Detent pin
When the se lect or lever is in the P po sit i on wit h the
brake
pedal not d epressed, the shif tlock cable sto p
-
per keep s the lever lo cke d so that th e rod a nd lo ck
cam do no
t move.
As a result of this, th e pushbutto n of th e select or
lever linked
to the detent pin canno t be p r essed and
the selector le
ver canno t be shif ted f r om th e P posi
-
tion to anot her position.
When the brake pe dal is depressed
AC206903
AB
Brake pedal
Shiftlock cable
Stopper
Lever
RodLock cam
Detent pin
When th
e brake ped al is dep ressed, th e sto pper is
pulled by the shif
tlo c k cable so that t he le ver
beco
m es unlo c ked.
Then the lock cam linked to the ro d can also rot a te
so th
at the sele ctor leve r can be shif ted fro m th e P
position
to ano ther po sition by pressing the push but
-
ton.
NOTE: Whe n the b r ake pedal is depressed with th e
ignition key in th e LOCK (OFF) po sition, th e select or
le
ve
r ca nn ot b e sh if te d fro m th e P p o sition t o an oth e r
position .

TRANSMISSION CONTROL
CONTINUOUSLY VARIABLE TRANSMISSION (CVT)23-9
When the ignition key is in the LOCK (OFF) position or pulled out (With the selector
lever in the P position)
AC206911 AB
Slider
Ignition key 
LOCK (OFF) position
Projection of rotor
Key interlock cable
Lock cam
Rod
Lever
Engine starting
switch assembly
In the e
ngin e st arting switch a s sembly , the slider is
engage
d with t he groo ve o f the key interlock cab l e,
and the
slider is locked by the p r ojection of the rotor
so th
at the key interlock ca ble a s well as the lever ,
rod, and
lock cam d oes not move.As a result of this, an y att e mpt to sh if t the sele ctor
lever is prevented.
The pu shbu tton on the selector
lever can
not be pressed b e cau s e th e lock cam does
not rot
a te, then t he se lector le ver cannot be shif ted
from t
he P position to a nother position .

TRANSMISSION CONTROL
CONTINUOUSLY VARIABLE TRANSMISSION (CVT)23-10
When the ignition key is in other than the LOCK (OFF) posi tion (With the selector
lever in the P position)
AC206912 AB
A
Slider
Ignition key
ACC to START
position
Projection of rotor
Key interlock cable
Lock cam
Rod
Lever
Engine starting
switch assembly
The roto
r in th e engine st a r ting switch assembly has
a notch betwee
n ACC a nd ST AR T so that th e slider
beco
m es unlo c ked.
Then the slider can move in t he direction A as illus-
trated in the figure to allow the lock cam to rot a te so
that the se
lector lever can be shif ted fro m the P posi
-
tion to anoth e r position by pressin g the p u shb u tton.
NOTE: Whe n the ignition key is in oth e r than the
LOCK (OFF) position with the bra k e pe dal n o t
depressed , the sele ctor leve r cann ot be shif ted fro m
the P position to anothe r positio n.
KEY INTERLOCK MECHANISM
When the se lect or lever is not in th e P positio n, the
ignition
key cann ot be turned to the L O CK (OF F )
position
and pu lle d out.

TRANSMISSION CONTROL
CONTINUOUSLY VARIABLE TRANSMISSION (CVT)23-11
When pulling out the key with the selector lever in other than the P position
AC206912AC
B
A
A
Slider
Ignition key
ACC to START
position
Projection of rotor
Key interlock cable
Lock cam
Rod
Lever
Engine starting
switch assembly
The lo
ck cam is kep t in a rot a ted condition, and th e
key inte
rlock ca ble is kept p u lle d in direction A as
illustra
t ed in the figure. I n this st ate , the slider in the
e
ngine st a r ting swit ch asse mbly is moved and lo cked
in direction B as illustrated in the
figu re.As a result of th is, a n y at te mpt to t u rn th e ign i t i o n k e y
to the L
O CK (OFF) position is prevented beca u se
the slide
r prevent s the rotor fro m rot a ting, an d the
ignition key can only turn up to the
ACC position a nd
cann
ot be p u lle d out.

TRANSMISSION CONTROL
CONTINUOUSLY VARIABLE TRANSMISSION (CVT)23-12
When pulling out the key with the selector lever in the P position
AC206911AC
A
A
Slider
Ignition key
ACC to START
position
Projection of rotor
Key interlock cable
Lock cam
Rod
Lever
Engine starting
switch assembly
Detent pin
When re leasing the push button on t he selector leve r
with the se
lector lever in the P position , the lock ca m
is ro
t a t ed by the d e tent p i n. Th en the key inte rlock
cable
is moved by the lo ck cam in dire ction A as illus
-
trated in the figure .
As a result of this, th e slider in the engine st arting
switch assembly is unlocked. The rotor can then turn,
and the
ign i tion key ca n be p u lle d out b y turn ing it to
the LOCK (OFF)
position .