MITSUBISHI COLT 2006 Service Repair Manual

OPERATION
CONTROLLER AREA NETWORK (CAN)54C-4
OPERATION
M2542000300313
AC206267
ECU-1A
AAA
BBB CCA
B
Interval "a"
Interval "b" Interval "c"
CCC BB
AAA
ECU-1
ECU-2
CAN bus
Data frames
AC206267
AD
Transmission
suspended by
mediation
Re-
transmission
The CAN commun ica t ion system is describe d below .
•Each ECU communicating with CAN pe riodically
se
nds several sensors’ inf o rmation on CAN bu s
as dat
a frame (calle d periodical send ing d a t a ).
For furt
her det ails, co nsult the dat a frame sectio n
.
•ECUs requirin g dat a on CAN bu s can receive
dat
a fra m es sen t from each ECU simult aneo usly .
•The dat a se nt from each ECU condu cting CAN
co
mmunicatio n is transmitted at 10-100 0 msec
in
terva l dep endin g on n e cessity of dat a.
NOTE: In the f i gure ab ove, th e dat a frame A is trans-
mitted in "a" intervals, while the d a t a frames B
and
C are tran smitted at int e rvals "b" and "c,"
respective
ly .
•A single ECU tra n smit s multiple dat a frames.
•When dat a frames conf lict with o ne ano ther
(when
plural ECUs tr ansmit signals simu lt ane
-
ously), data is prioriti sed for transmission b y
mediat
ion, t herefore , plu r al da t a frames are not
se
nt simult aneously . F o r furthe r det ails, consult
the
mediatio n se ctio n
.
•Data is transmitted no t by the conve n tion al volt-
age-using method b u t by volt a ge pot entia l dif f er-
ence. For further det ails, consu l t the section on
CAN
bus volt ag e transformation
.
•Reliability of each ECU transmitting sig nals via
CAN
commun ica t ion is secu red by several error
det
ection and reco very processes. For furth e r
det
ails, consult the sections on error detection
and
sy stem rec o very
.
MEDIA T I O N
Because ea ch ECU transmit s dat a indepe ndently o n
the CAN bus,
there a r e ca ses of da t a collision whe n
multiple dat
a frames that ECUs at temp t to tran smit
simult
ane ously (if mu ltiple ECUs tran smit at n early
the same
moment). At th is moment, p r ocessing of
the ECUs atte
mpting tra n smission is performed in
the followin
g way .
1.Dat a frame with high priority is tra n smitted first
accord ing to ID cod e s memo rize d in dat a frames.
2.T r ansmission of lo w-p r iori ty dat a (dat a frames) is
suspe nded b y the issuin g ECUs until the bus
clears (when no transmission da t a exist s on the
CAN bus).
NO TE: If th e su spen ded st a t e co ntinu e s fo r a sp e-
cific time, new d a t a (dat a frame content ) is cre-
ated and sent.
3.ECU cont aining suspende d dat a fra m es trans-
mits the dat a when t he bus become s available .
NOTE: The re is enou gh ca p a city on t he CAN bus,
wh
ich
neve r prevent s da t a f r ames from being se nt.

OPERATION
CONTROLLER AREA NETWORK (CAN)54C-5
VOLTAGE TRANSFORMATION ON THE
CAN BUS
AC204753
Voltage
transformation
in CAN_L
State:
Logic value:Recessive Recessive
Dominant 3.5 V
2.5 V
1.5 V
0
1
AC
Voltage
transformation
in CAN_H
Dat
a f r ame t r ansmissio n throu gh the CAN bu s line
i
n vo lve s vo lt ag e tran sfo r ma ti on (for o u t p u t sign al s) in
the distinctive CAN profile a
s follows. The ECU
transmitting th
rough t he CAN_ H and CAN_L bus
line
s sends 2.5-3.5 V sig nals to th e CAN_H side and
2.5-1.5V sign
als to the CAN_L sid e . The receivin g
ECU read
s the dat a from the CAN_H and CAN_L
potential d
i f f e r ence . "Recessive" re fers to the st ate
whe
r e both CAN_H an d CAN_ L are u nder th e 2.5-V
st
ate, an d "Dominant" r e fers to the st ate where CAN_H is u nder the 3.5 - V st a t e and CAN_L is un der
the 1.5 - V st ate. By transforma t ion mainly to 2.5V ,
even in cases when volt age is rend ered 0 from fault y
ground ing o r the like (causing a prob lem of an
approximate 0.5 volt ag e incre a se on the co mmu nica
-
tions line), communication ca n be continued unint er-
rupted. Emplo y in g dua l co mmunicatio n s lines
imp
r oves reliability to pre v en t the pre s ence of noise,
comp
a r ed to t he co nven tion al communication
metho
d .
DAT A FRAMES
AC204754
ID region CRC
regionACK
region
Control
region Data region
Data Frames
AC204754AC
SOF
EOF
SOF (St a rt of Fra m e)
•Indi cat e s th e st art o f the fra m e
ID (I dentifier) regi on
•Iden tifies th e dat a content wh ile specifying prior-
ity rank in case of mediation
Cont rol re gion
•Specifies the frame type , dat a le ngth, e t c.
Data region
•Va lues used for d a t a con t rol, e t c.
Cyclic Redun dancy Che ck (CRC) reg i on
•Region wh er e to che c k fo r e r r o rs in se nt da t a , t h e
t
r a n s m it t i ng EC U ca l c u l at e s da t a re g i on s by
app
lying pre s cribed operations and stores the
result
s. The receiving ECU de tect s e rroneou s
communicatio
n by comp a r ing the CRC regio n
with
the da t a r egion .
ACK (Acknowledge) region
•Region where to co nform the reception of sent
dat
a
EOF(End of Fra m e)
•Indi ca tes th e end of the frame

SELF-DIAGNOSIS
CONTROLLER AREA NETWORK (CAN)54C-6
ERROR DETECTION AND RECOVERY
CAN protocol secures its reliability of communication
by providing several error detection function such as
CRC shown in data frame, and the recovery function
(recovery is performed by resending, from abnormal
state such as transmission errors). If an error is
detected but it is not resolved even after recovery,
communication is stopped. This state is called "Bus
Off."
SELF-DIAGNOSIS
M2542000400280
•CAN self-diagnosis is performed by each ECU
connected to the CAN bus.
•diagnosis codes related to communication are
named with the capital letter U, and are called
"U-codes."
•A summary of the CAN self-diagnosis system is
presented below.
TIME-OUT
Each ECU transmits data frames periodically. If the
data frame is not received within the specified period,
the intended receiving ECU transmits a diagnosis
code indicating communication time-out for the ECU
that failed to transmit.
BUS OFF
Related to a communication error that persists even
after the transmitting ECU attempts recovery for a
specified number of attempts or that persists for a
specified period after recovery, communication is
stopped and this diagnostic code is issued.
FA I L U R E D ATA
When the transmitting ECU detects failure of a sen-
sor directly connected to it, this is the pertinent data
used to inform the ECU.
DATA LENGTH ERROR
When the number of data bytes received is different
from the prescribed number of bytes, this diagnosis
code is issued.
DYNAMIC RANGE ERROR
When the data received is more or less than the pre-
scribed range, this diagnosis code is issued.
CAN BUS DIAGNOSTICS
M2542000500179
As ECUs are connected via CAN bus (including
M.U.T.-III), always diagnose CAN bus to confirm its
normality when inspecting. Simply by performing
M.U.T.-III screen operations, the following inspec
-
tions can be performed automatically, and the result
can be used to verify the CAN bus status.
•Voltage measurement between the CAN_L and
CAN_H and the body earthing terminal
•Resistance measurement between the CAN_L
and CAN_H
•Confirmation of communication of all ECUs

GROUP 42
BODY
CONTENTS
GENERAL INFORMATION . . . . . . . .42-2
MAIN BODY . . . . . . . . . . . . . . . . . . . .42-3
BODY PANELING . . . . . . . . . . . . . . . . . . . . 42-3
BODY SHELL . . . . . . . . . . . . . . . . . . . . . . . 42-4
QUIETNESS . . . . . . . . . . . . . . . . . . . . . . . . 42-9
BODY COLOUR CHARTS . . . . . . . . . . . . . 42-9
HOOD <4G1> . . . . . . . . . . . . . . . . . . .42-10
STRUT TOWER BAR <4G1>. . . . . . .42-10
DOOR . . . . . . . . . . . . . . . . . . . . . . . . .42-11
DOOR LOCK . . . . . . . . . . . . . . . . . . . . . . . . 42-11
KEYLESS ENTRY SYSTEM . . . . . . . . . . . . 42-13
POWER WINDOW . . . . . . . . . . . . . . . . . . . 42-15
WEATHERSTRIP . . . . . . . . . . . . . . . . . . . . 42-17
PROTECTOR FILM. . . . . . . . . . . . . . .42-17
WINDOW GLASS . . . . . . . . . . . . . . . .42-18
SUNROOF. . . . . . . . . . . . . . . . . . . . . .42-20
LOOSE PANELS <4G1> . . . . . . . . . .42-22

GENERAL INFORMATION
BODY42-2
GENERAL INFORMATION
M2420000100842
FEATURES
WEIGHT REDUCTION AND HIGH RIGID-
ITY
•Application ranges of high tension steel plate,
antirust steel plate, and uneven thickness steel
plate have been expanded.
•The upper frame outer and front pillar connection
has been strengthened by adopting the upper
frame-to-front pillar brace.
•The radius of each opening corner for the doors
and tailgate has been enlarged.
•Cowl top lower panel and spring house panel are
directly joined for higher rigidity.
•Strut tower bar has been adopted <4G1>.
•A front suspension axle side plate has been
adopted <4G1>.
•The air outlet garnish has been installed to the
hood, improving the sporty image and cooling
efficiency in the engine compartment. <4G1>
REDUCTION OF VIBRATION, NOISE, AND
AERODYNAMIC NOISE
•Straight frame structure has been adopted.
•Curved front floor and uneven thickness steel
plate have been adopted.
•Rigidity of the suspension installation part has
been improved.
IMPROVEMENTS IN SAFETY
•RISE (Reinforced Impact Safety Evolution) has
been used for the main body.
•Features a side door beam to boost safety upon
side impact.
•Direct combination key cylinder and inside lock
cables for the front doors have been adopted to
improve safety upon impact.
IMPROVEMENTS IN OPERATION
QUALITY
•The central door locking system, which
locks/unlocks all the doors and the tailgate, is
adopted.
•"P" position shift linked door-unlock function has
been introduced to the central door locking sys
-
tem(F1C1A).
IMPROVEMENTS OF PRODUCT
PACKAGE AND APPEARANCE
•Rigidity of door sash bottom section has been
improved.
•By improving the engaging sound between the
door latch and striker, the door locking sound
quality has been enhanced.
•UV & heat protect glass has been used for the
windshield.
•UV-reducing glass has been used for the front
door window glasses and rear door window
glasses.
•Privacy glasses have been used for rear door
window glasses, quarter window glasses, and
tailgate window glass (Option).
•Multi-mode keyless entry system (with door mir-
ror retraction/return control function) has been
adopted.
•Protector film has been attached on side sill
.
•Sunroof has been installed (Option).

MAIN BODY
BODY42-3
MAIN BODY
BODY PANELINGM2420002000636
AB200766
AB400640AD : High-tensile steel panels : Anti-corrosion steel panels

MAIN BODY
BODY42-4
•RISE (Reinforced Impact Safety Evolution) has
been adopted for the main body in order to
ensure all-round impact safety at high level.
•The use range of rust-resistant steel plates has
been expanded and high strength steel plates
have been optimally arranged. In addition,
rust-resistant steel plates are adopted for items
such as the hood, doors, inner panels of tailgate,
and reinforcements in order to improve the rust
resistance of the main body and to reduce its
weight.
•Sealer has been applied to the entire folded area
of the flanges for the doors, hood, and tailgate in
order to improve rust resistance.
BODY SHELL
M2420003000651
IMPACT SAFETY BODY RISE (REIN-
FORCED IMPACT SAFETY EVOLUTION)
AB201266
AB201267AB502015
AB400214
AB
1
2
4
Front sidemember inner
Front sidemember outer
B AA
B
Section B – B Section A – A
Front sidemember inner
Front sidemember outer
3
The fron
t and re ar st ructure s to abso r b hig h ener gy ,
and the
high ly tough cabin str u cture reduce the risk
of p
a ssenger inju ries at fron t-, rear-, and side-imp a ct
collisions, se
cure the sp a c e fo r life protection , and
facilit
ate rescuing p a sse ngers. The structures also
have
the followin g feat ures:1.The front side of the front sidemember , for wh ich
oct a gonal section stru cture is a dopted , has been
enlarged for improved rigidity .
2.The rear side o f the fr ont sidememb e r , for which
8-shape cross section struct ure is adop ted, ha s
bee n enlarged for improved rig i dity .

MAIN BODY
BODY42-5
3. The dash side brace has been manufactured as an unit in order to strengthen the joint between
the front sidemember and the front pillar, increas
-
ing the rigidity of the entire body.
4. The installation position of the steering gearbox has been lowered, and the sidemember from the
front to the rear has been straightened in order to
improve rigidity of the entire body.
UNEVEN THICKNESS STEEL PLATE
AB400963
AB400941
AC
The rear door inner panel
is thicker toward the front of the vehicle.The front sidemember rear
is increasingly thicker toward
the front of the vehicle.The front floor pan
is thicker at the inner part.
The front door inner panel
is thicker toward the front of the vehicle.
The centre pillar reinforcement
is thicker at the upper part. (With the side outer panel removed) The tailgate inner panel
is thicker at the upper part.
The rear floor sidemember
is thicker at the front part.
Uneven thickness steel plate* wit h inte grate d uneven
thickness structure ha
s bee n ado pted fo r imp r ove d
safet
y upo n imp a ct an d redu ced weight.NOTE: *: S t ee l p l a t es with di ffer ent th ickn ess welded
togethe
r to make one steel plate .

MAIN BODY
BODY42-6
DRIVING STABILITY
AB502016
AB400213
A
A
Cowl top lower panel
Spring house panel
Corner of door opening
Corner of tailgate opening
AB
Section A – A
1.
The cowl t op lo we r p a nel a nd the spring ho use
p a n e l h a ve be en dire ct ly inst alled , a n d th e rigidity
of the fro n t suspen sion inst allation area ha s b een
in creased, in orde r to improve drivin g st abilit y .2.In o r der to imp r ove h andling st ability , th e radius
of t he ope ning corne r s for the do or and t a ilgat e
has bee n enlarged t o driving rigidity of the frame
connection s.

MAIN BODY
BODY42-7
DRIVING STABILITY
AB400932
AB400232AB400233
AB400213A
A
Cowl top lower panel
Spring house
panel
Corner of door opening
Corner of tailgate opening
AB
Section A – A1
2
2
4,5
3
Upper frame to
front pillar brace
Front upper
outer plate
Front upper
frame outer
Cowl top extension lower
1.
The cowl t op lo we r p a nel a nd the spring ho use
p a n e l h a ve be en dire ct ly inst alled , a n d th e rigidity
of the fro n t suspen sion inst allation area ha s b een
in creased, in orde r to improve han dling st ab ility .
2.In o r der to imp r ove h andling st a b ility , the radius
of t he ope ning corne r s for the do or and t a ilgate
has bee n enlarged t o increase rigidity of th e
frame connection s.
3.The cowl t op extension lower has bee n adde d to
the cowl t op p anel and d i rectly secured t o the
sp ring house p anel. This improves rigidity a t the
su spen sio n mo untin gs.
4.Driving st ability has bee n improved by jo ining the
fron t uppe r frame outer a nd the front p illar by the
upp er frame-to-fro nt pillar b r ace . (RALL I AR T V e r
-
sion-R)
5.Rigidity has been impr ove d at the suspension
mountings b y joining the front u pper fra m e ou ter
and the cowl top lower p a n e l by the t h icker fro n t
upp er oute r plat e.