New for 2018! ETC Tester -
Electronic Throttle Control Tester
ETC Electronic Throttle Control test system for testing all drive-by-wire
twist grip sensors and throttle body actuators.
any PC for display. Includes software for Windows XP/Vista/7/8/10
Tester includes electrical harness, power supply and software.
The twist grip
assembly, throttle body
and TCFI6 ECU sold separately.
ETC Test Software main display:
Order online using Paypal or call us at 386-322-7390
(Monday-Friday 9 AM to 5 PM Eastern time) for credit card and COD
orders. For online orders, please email any
special instructions to
All products covered by our
1 year limited warranty.
Electronic Throttle Control Harness for TCFI Gen 6
(requires customer supplied TCFI Gen 6 ECU, usb interface, twist grip and
throttle body assembly).
Electronic Throttle Control Test System
includes TCFI 6 ECU and USB interface (requires customer supplied twist grip
and throttle body assembly).
The ETC Test has two main options that allow you to test the electronic
throttle control system without the engine running:
test. Throttle control actuator (TCA) throttle position follows twist grip
sensor (TGS) command. This option is useful for a quick check of TCA
operation. Click 'Manual Test' to enable ETC manual test mode. The program
will then display real time of the TGS and TPS data.
Characteristic curve. The system plots out the characteristic curve of TCA
throttle position versus TCA motor pulse-width modulated (PWM) drive. This
option allows detection of defects such as excessive friction, incorrect or
noisy TPS signals, and broken gear teeth. Click on the Start Characteristic
Test button to begin the test process that will require approximately 1
minute to complete. A typical characteristic curve for a properly
functioning throttle body is shown below. The red trace shows the primary
rising sensor (TPS1) voltage level versus TCA motor PWM drive. The green
trace shows the sum of the rising and falling sensors (TPS1 and TPS2) versus
TCA motor PWM drive. Test parameters including TPS1 levels corresponding to
zero, limp back and wide open position are also reported. Refer to the ETC
Tester instructions for more details.
Characteristic Curve Data:
The red trace shows the hysteresis loops
caused by friction and spring tension in two regions, above and below limp
back position (refer to the figure below). Each test cycle starts at zero
PWM with the TCA at limp back position (approximately 0.75V). TCA PWM is
stepped to 40%. At approximately 15% PWM, motor torque is sufficient to
overcome spring tension and friction and the throttle starts to open. TPS1
rises to approximately 4.75V (wide open throttle) at approximately 30% PWM.
Next, PWM is stepped back down to zero. As PWM drops down below
approximately 12%, friction effects are overcome and spring tension closes
the throttle back to limp back position. TCA PWM is then stepped in the
negative direction to -40%. At approximately -20% PWM, motor torque is
sufficient to overcome spring tension and friction and the throttle starts
to close. TPS1 falls to approximately 0.5V (closed throttle) at
approximately -23% PWM. At the end of each test cycle, TCA PWM is stepped
back to zero and the throttle returns to limp back position. The traces for
multiple test cycles should overlap closely.
trace showing the sum of TPS1 and TPS2 should always be very close to 5.0V.
The resistive TPS elements can wear out and become noisy, like a scratchy
volume control on an old radio. This noise will appear as wiggles or jumps
in the green trace.
gear tooth near limp back position is a common failure mode. The figure
below shows the effect.
ETC Test Instructions
ETC Test Software
The ETC Test
software runs under
Microsoft Windows XP/Vista/Win7/Win8/Win10.
We no longer support
older Windows versions. Minimum PC requirement is a 300
MHz Pentium with super VGA display (SVGA with 1024 x 768 pixel resolution). The
ETC Tester connects to the PC by means of a USB interface. A USB cable is
supplied with the unit. The PC must have a free USB port. If you have an older
PC without USB capability, you cannot use the ETC Tester.
more detailed product
information, we suggest that you download the ETC Test software and