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DUAL CLUTCH TRANSMISSION ( DCT ) ( CTX
700 D / ND )
DCT
TROUBLESHOOTING
INFORMATION
GENERAL TROUBLESHOOTING
Intermittent Failure
The
term
"
intermittent failure
"
means a system
may
have had a failure
,
but it
checks
OK now
. If the shift i n d i c a t o r d o e s
not come
on
,
check
for
poor contact or loose pins at all connectors related to the circuit that you are troubleshooting
. If the
shift indicator
was on , but then went
out ,
the original problem may be intermittent
.
Opens and Shorts
"
Opens "
and
" Shorts "
are
common electrical
terms
.
An open is a break in a wire or at a connection
.
A short is an accidental
connection of a wire
to ground or to
another wire . In simple electronics
,
this usually means something will
not
work
at
all . With
PCMs this
can
sometimes
mean something works , but not the way it
'
s supposed to
.
If the shift i n d i c a t o r h a s come on
Refer
to DTC
READOUT
( page 12
-
9 )
.
If the shift indicator
did
not stay on
If the shift i n d i c a t o r d i d not
stay on , but
there is a driveability problem
,
do the
SYMPTOM TROUBLESHOOTING (
page
12
-
5 )
.
1
SYSTEM
DESCRIPTION
SELF - DIAGNOSIS SYSTEM
The DCT system is equipped with the self
-
diagnostic system
. When
any
abnormality occurs in the DCT system , the PCM have the shift indicator [ 1 ]
blinking
and stores a
DTC in its erasable memory
for
the relevant
system failure
.
/ /
v
.
v
>
:
V
/
r
\
HI
FAIL
-
SAFE FUNCTION
The
DCT system is provided with a fail
-
safe function to secure a minimum running capability even when there is trouble in the
system .
When the
PCM detects a problem in the DCT system
,
the PCM stops the gearshift function , and hold the gear position
.
Also , the
shift indicator blinks
to
indicate
the DTC
.
DTC ( Diagnostic Trouble Code )
•
The DTC is composed of a main code and a sub code and it is displayed as a hyphenated number when retrieved from the PCM
with the MCS .
The digits in front of the hyphen are the main code
,
they
indicate the
component of
function failure .
The digits behind the hyphen are the sub code
,
they detail the specific symptom
of
the component or function failure .
For example , in the case
of the shift spindle angle sensor :
-
DTC 21
—
1
= ( Shift spindle angle
sensor voltage )
-
( lower than the specified value )
-
DTC 21
-
2
=
( Shift spindle angle sensor voltage )
-
( higher than the specified value )
12
- 7
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Table of Contents
Troubleshooting
