SSANGYONG Y200 Manual page 1195

5A-100 AUTOMATIC TRANSMISSION
DIAGNOSTIC TROUBLE CODE (DTC) P1721
Circuit Description
The Controller Area Network (CAN) connects various
control modules by using a twisted pair of wires, to
share common information. This results in a reduction
of sensors and wiring. TCM obtains the actual engine
speed and throttle position, vehicle speed and
accelerator etc. from ECM via CAN without any
additional sensors.
The DTC P1721 sets when the throttle signal via CAN
is out of range. The throttle is greater than 254 steps.
Conditions for Setting the DTC
•
DTC P1719 is not set.
•
The throttle is greater than 254 steps. The malfunc-
tion triggers immediately after the above condition
occurs.
Action Taken When the DTC Sets
•
The throttle signal is defaulted to 100 %.
•
Shift quality is degraded.
•
All shifts will be firm as full throttle and hence high
engine torque is assumed.
•
Line pressure will always stay high (S6 OFF) to cope
with the assumed high throttle/ torque.
•
Manual 1 gear selection is inhibited.
Conditions for Clearing the DTC
•
The DTC will clear if the malfunction is not present
for 30 seconds.
THROTTLE SIGNAL ERROR
•
•
Diagnostic Aids
•
•
•
Test Description
The number(s) below refer to the step number(s) on
the Diagnostic Table.
A history DTC will clear after 40 TCM power-up
cycles with a warm transmission (>50 ° C) and
without a fault.
History DTCs can be cleared by using a scan tool.
Inspect the wiring for poor electrical connections
at the TCM and ECM connectors. Look for possible
bent, backed out, deformed or damaged terminals.
Check for weak terminal tension as well. Also check
for chafed wires that could short to bare metal or
other wiring. Inspect for broken wire inside the
insulation.
If diagnosing for a possible intermittent short or
open condition, move or massage the wiring harness
while observing test equipment for a change.
When ECM finds a fault on the throttle signals, ECM
will adopt a default mode and send the default value
and trouble message to TCM via CAN.
3. Check if there are any DTCs related to the throttle
position sensor on the ECM side.
4. Check for a poor connection at the ECM and TCM
connectors.
YAD5A060
SSANGYONG Y200