SSANGYONG Y200 Manual page 1169

5A-74 AUTOMATIC TRANSMISSION
DIAGNOSTIC TROUBLE CODE (DTC) P1704
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 position etc. from ECM via CAN without
any additional sensors.
The DTC P1704 sets when the indicated drive shaft
speed signal via CAN is out of range or not feasible or
a shaft speed of 0 is present while other signals indicate
the vehicle is being driven.
Conditions for Setting the DTC
•
Immediately upon the test indicating malfunction
as follows.
•
The shaft speed signal is greater than 9000 rpm or
less than 0 rpm under the precondition that DTC
P1719 is not set.
•
The shaft speed indicates 0 rpm while all other sig-
nals indicate the car is moving under the following
precondition;
- Driving gear is selected.
- The transmission range sensor has not recently
changed state.
- The engine speed is greater than 2800 rpm.
- DTCs P0706, P0707, P0708, P1703 and P1719
are not set.
•
The shaft speed has dropped from above 2100 rpm
to 0 rpm within 20ms.
SHAFT SPEED SIGNAL ERROR
Action Taken When the DTC Sets
•
All skip downshifts disabled and fourth gear will
be in-hibited.
•
The torque converter will be unlocked at all times.
•
Gears are selected by the shift control lever but all
downshifts are inhibited by engine speed limits to
prevent over-revving.
•
D position selects 3rd gear.
•
1st and 2nd gears can be manually selected.
Conditions for Clearing the DTC
•
The DTC will clear when the malfunction has not
occurred for 30 seconds and a non-zero speed is
detected.
•
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.
Diagnostic Aids
•
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.
YAD5A010
SSANGYONG Y200