TRX-4 79 K5 Blazer Manual
32 
•
 TRX-4
TQ
i
 ADVANCED TUNING GUIDE
LED Color / Pattern Name Notes
Solid green Normal Driving Mode See page 15 for information on how to use your transmitter controls.
Slow red (0.5 sec on / 0.5 sec off) Binding See page 17 for more information on binding.
Flashing fast green (0.1 sec on / 0.15 sec off) Throttle Trim Seek Mode
Turn the Multi-Function knob right or left until the LED stops flashing. 
See the sidebar for more information.
Flashing medium red (0.25 sec on / 0.25 sec off) Low Battery Alarm Put new batteries in the transmitter. See page 13 for more information.
Flashing fast red (0.125 sec on / 0.125 sec off) Link Failure / Error
Transmitter and receiver are no longer bound. Turn the system off and then 
back on to resume normal operation. Find source of the link failure (i.e., out of 
range, low batteries, damaged antenna).
Programming Patterns
Counts out number (green or red), then pauses Current menu position See Menu Tree for more information.
Fast green 8 times Menu setting accepted (on SET)
Fast red 8 times Menu SET invalid User error, such as trying to delete a locked model.
LED Color / Pattern Name Notes
Solid green Normal Driving Mode See page 15 for information on how to use your transmitter controls.
Slow red (0.5 sec on / 0.5 sec off) Binding See page 17 for more information on binding.
Flashing fast red (0.125 sec on / 0.125 sec off) Fail-Safe / Low Voltage Detect
Consistent low voltage in the receiver triggers Fail-Safe so there is enough 
power to center the throttle servo before it completely loses power.
x
8
x
8
or
TRANSMITTER LED CODES
RECEIVER LED CODES
The recommended (default) 
setting for TSM is to rotate the 
knob to the 12:00 position (the 
zero mark on the dial). 
Turn the knob clockwise to 
increase assistance; turn the knob 
counterclockwise to decrease 
assistance. Turn the knob 
counterclockwise to its stop to 
turn TSM completely off. 
Note: TSM is deactivated 
automatically when driving or 
braking in reverse. 
When driving on surfaces with 
some traction, decrease the TSM 
setting to allow the vehicle to 
feel more “loose”. On surfaces 
with very little traction (loose 
dirt, smooth concrete, ice/snow), increase TSM to maximize acceleration 
and control. TSM should be disabled when precise wheel placement is 
needed, such as during rock crawling or scaling extreme terrain.
Note: TSM must be completely turned off while adjusting steering trim.
Steering and Throttle End Points
The TQi transmitter allows you to choose the limit of the servo’s travel 
range (or its “end point”) independently for left and right travel (on the 
steering channel) and throttle/brake travel (on the throttle channel). 
This allows you to fine-tune the servo settings to prevent binding 
caused by the servo moving steering or throttle linkages (in the case 
of a nitro model) farther than their mechanical limits. The end point 
adjustment settings you select will represent what you wish to be the 
servo’s maximum travel; the Steering Percentage or Braking Percentage 
functions will not override the End Point settings. 
Steering and Throttle Sub-Trim
The Sub-Trim function is used to precisely set the neutral point of the 
steering or throttle servo in the event that simply setting the trim knob 
to “zero” does not completely center the servo. When selected, Sub-Trim 
allows finer adjustment to the servo output shaft’s position for precise 
setting of the neutral point. Always set the Steering Trim knob to zero 
before making final adjustment (if required) using Sub-Trim. If Throttle 
Trim has been previously adjusted, the Throttle Trim will need to be 
reprogrammed to “zero” before making final adjustment using Sub-Trim.
Failsafe
Your Traxxas radio system is 
equipped with a built-in failsafe 
function that returns the throttle 
to its last saved neutral position 
in the event of a signal loss. The 
LED on the transmitter and on the 
receiver will rapidly flash red.
In order to re-acquire the signal 
after the failsafe has activated, 
you will need to walk a longer 
distance closer to the model than 
the distance the model travelled 
out of range. Simply keep walking 
towards the model until you re-
acquire the signal.
Throttle Trim Seek Mode
When the Multi-Function knob is 
set to throttle trim, the transmitter 
remembers the throttle trim 
setting. If the throttle trim knob 
(Multi-Function knob) is moved 
from the original setting while 
the transmitter is off, or while the 
transmitter was used to control 
another model, the transmitter 
ignores the actual position of 
the trim knob. This prevents the 
model from accidentally running 
away. The LED on the face of the 
transmitter will rapidly blink green 
and the throttle trim knob (Multi-
Function knob) will not adjust the 
trim until it is moved back to its 
original position saved in memory. 
To restore throttle trim control, 
simply turn the Multi-Function 
knob either direction until the LED 
stops blinking. 
Recommended setting
Decrease 
assistance
Increase 
assistance
TSM o










