SSANGYONG Rexton Y200 Manual page 978

5A-6 AUTOMATIC TRANSMISSION
Maintaining good shift feel through the transmission
life span is dependant on having an accurate measure
of the engine throttle position. To achieve this the TCU
continuously monitors the maximum and minimum
throttle potentiometer voltages and, if a change occurs,
stores the new voltage values.
However these limits will be lost and will require
relearning should a new TCU be installed, or the throttle
calibration data is cleared by the execution of a
particular sequence. This last instance depends on
the installation, and reference should be made to the
Diagnostics Section of this manual. The relearning will
happen automatically.
Gear Position Sensor
The gear position sensor is incorporated in the inhibitor
switch mounted on the side of the transmission case.
The gear position sensor is a multi-function switch pro-
viding three functions;
•
Inhibit starting of the vehicle when the shift lever is
in a position other than Park or Neutral
•
Illuminate the reverse lamps when Reverse is se-
lected
•
Indicate to the TCM which lever position has been
selected by way of a varying resistance.
Readings for Resistance / Shift Lever Positions
Shift Lever Position
Manual 1
Manual 2
Manual 3
Kickdown Switch
The Kickdown Switch is used to signal the TCM that
the driver has pressed the acclerator to the floor and
requires a kickdown shift. When this switch is used,
the POWER light comes ON and the POWER shift
pattern is used.
Diagnostic Inputs
The diagnostic control input or K-line is used to initiate
the outputting of diagnostic data from the TCM to a
diagnostic test instrument. This input may also be used
to clear the stored fault history data from the TCM's
retentive memory. Connection to the diagnostic input
of the TCM is via a connector included in the vehicle's
YAD5A250
wiring harness or computer interface.
Battery Voltage Monitoring Input
The battery voltage monitoring input is connected to
the positive side of the battery. This signal is taken
from the main supply to the TCM.
If the battery voltage at the TCM falls below 11.3 V,
the transmission will adopt a low voltage mode of
operating in which shifts into first gear are inhibited.
All other shifts are allowed but may not occur because
of the reduced voltage. This condition normally occurs
only when the battery is in poor condition.
If the battery voltage is greater than 16.5 V, the trans-
mission will adopt limp home mode and all solenoids
are turned OFF.
When system voltage recovers, the TCM will resume
normal operation after a 30 seconds delay period.
TCM Outputs
KAA5A060
The outputs from the TCM are supplied to the compo-
nents described below;
•
Solenoids
•
Mode Indicator Light
Drive
Neutral
Reverse
Park
Resistance (kΩ Ω Ω Ω Ω )
1 ~ 1.4
21.8 ~ 2.2
3 3 ~ 3.4
4.5 ~ 4.9
6.8 ~ 7.2
10.8 ~ 11.2
18.6 ~ 19
SSANGYONG Y200