Suzuki Grand Vitara Manual page 16

5A-12 Automatic Transmission/Transaxle:
2
2 Driving cycle detection logic
The malfunction detected in the first driving cycle is
stored in TCM memory (in the form of pending DTC and
freeze frame data) but the malfunction indicator lamp
does not light at this time. It lights up at the second
detection of same malfunction also in the next driving
cycle.
Pending DTC
Pending DTC means a DTC detected and stored
temporarily at 1 driving cycle of the DTC which is
detected in the 2 driving cycle detection logic.
Freeze frame data
TCM stores the engine and driving conditions at the
moment of the detection of a malfunction in its memory.
This data is called "Freeze frame data".
Therefore, it is possible to know engine and driving
conditions (e.g., whether the engine was warm or not,
where the vehicle was running or stopped) when a
malfunction was detected by checking the freeze frame
data.
For Vehicle with Engine Diagnosis Connector
For automatic transmission control system, TCM has the
following functions. Refer to "Inspection of TCM and Its
Circuits: ".
• When ignition switch is turned ON with no malfunction
in A/T control system is detected, transmission
warning light (1) lights for about 2 seconds after
ignition switch is turned ON and then goes OFF for
bulb check.
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• When TCM detects a malfunction in A/T control
system, it indicates transmission warning light (1) and
stores malfunction DTC in its memory.
• It is possible to communicate with TCM through data
link connector (DLC) (3) by using SUZUKI scan tool
(2). Diagnostic information can be checked and
erased by using SUZUKI scan tool.
• It is also possible to output DTC stored in TCM by
displaying DTC on digital display odometer (6) with
diagnosis switch terminal (5) of monitor connector (4)
grounded. If no DTC is stored in TCM memory, DTC
0000 is outputted repeatedly. If one or more DTCs are
stored in TCM memory, they are outputted starting
from smallest code number in increasing order. After
all DTCs are outputted, they are outputted again in the
same manner.
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