SSANGYONG Y200 Manual page 1163

5A-68 AUTOMATIC TRANSMISSION
DIAGNOSTIC TROUBLE CODE (DTC) P0790
NORMAL/PERFORMANCE SWITCH CIRCUIT MALFUNCTION
Circuit Description
The driving mode selector switch is located on the
center console and allows the driver to select the
driving mode.
When NORMAL mode is selected upshifts will occur
to maximize fuel economy. When POWER mode is se-
lected, upshifts will occur to give maximum
performance and the POWER mode indicator light is
switched ON.
When WINTER mode is selected, starting in second
gear is facilitated, the WINTER mode indicator light is
switched ON and the POWER mode indicator light is
switched OFF.
The DTC P0790 sets when an intermittent connection
in the mode selector switch (mode switch) circuit has
been detected. The mode switch input is rapidly
changing states. The switching frequency is greater
than 8.3 Hz.
Conditions for Setting the DTC
•
The mode switching frequency is greater than 8.3
Hz.
•
The above condition must be continuously present
for 4 state changes.
Action Taken When the DTC Sets
•
All shifts will occur as if the mode is set to NORMAL.
•
The mode indicator will always be OFF indicating
that NORMAL mode is selected.
•
The mode indicator will not respond to the changes
in switch setting.
Conditions for Clearing the DTC
•
The DTC will clear after 3 seconds without the fault.
•
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
•
This fault is caused by too many changes in the
mode input signal over a period of time.
•
Typical causes would be an intermittent connection
in the switch or wiring or an intermittent short to
ground in the wiring.
Test Description
The number(s) below refer to the step number(s) on
the Diagnostic Table.
3. Check mode switch signal circuit for an
intermittent open / short
5. Check mode switch ground circuit for an
intermittent open / short
8. Check mode switch feed circuit for an intermittent
open / short
YAD5A040
SSANGYONG Y200