The HMP1 is the most complete tool for mechanics testing, reading and/or emulating almost all car sensors.
It is so complete that it becomes the essential tool for servicing internal combustion vehicles.
Among its functions, we can highlight its ability to read and generate CKP & double CMP pulses simultaneously and the complete test of motorized throttle bodies and many more functions.
There are 3 types of possible actions for each sensor.
[T] Test. It means that the HMP1 can check the operation with the sensor/actuator outside the car (or disconnected)
[R] Reading. It means that you can read the operation without disconnecting it from the car and read/monitor its operation that way.
[E] Emulate. It means that the HMP will act as if it were the sensor so that the injection “believes” that the sensor is in place and working.
The HMP1 has 2 ways to test throttle bodies.
There are 2 functions of the HMP1 that allow you to test a throttle body, they are "Throttle" and "Search". Both functions are completely different in their internal functioning although they are similar in handling. Throttle . It is based on increasing the power on the engine and the movement is the consequence of the applied power. It is ideal for cleaning the throttle body, to test that the gears are not binding, and to appreciate a smooth and continuous movement. Hand movement can be assisted. Search . It is based on reading the TPS and applying the necessary power to fix the shutter in the place selected with the “+” or “-” buttons. It allows a more precise positioning of the shutter. The system takes the position of the reading of the TPS sensors, so a failure in these can cause erratic movement of the shutter. This test mode is ideal for checking the status of the TPS for skips or cuts in the tracks.
-Test that the butterflies open and close manually
-Test that the butterflies open and close automatically
-Informs the status of the TPS1 sensor
-Informs the status of the TPS2 sensor
-Informs the consumption of the motor coil
-Allows to open the butterfly for cleaning.
-Generate a complete report informing:
-Full range of motion of the TPS1 sensor
-Full range of motion of the TPS2 sensor
-Maximum difference between TPS1 & TPS2 sensors and place where it occurred
-Continuity of the tracks
-Maximum motor current consumption
-Polarity of the motor
-Consumption of set of TPS sensors
-Detect short circuits.
-Internal thermal protection
-Helps to diagnose mechanical problems in the acceleration body.
-Helps to diagnose sensor problems.
-Helps to clean the acceleration body.
Usage Mode
The following steps are what you must follow to test a throttle body
1) Engine MUST BE OFF before testing, Testing with the engine running may damage the engine. 2) Connect the throttle body using the appropriate connector or connect according to the following diagram:
You can use the section “pre-assembled cable selection” as a guide and check the connections, especially the M1 and M2 motor.
3) Connect the 12v and wait for the menu to appear on the screen.
Use the "+" and "-" buttons until you see "THROTTLE" or "Search " on screen and press OK 4) On the screen you will see 4 information similar to those in the image:
Please note that:
Top right: TPS1 shows 82% open
Bottom right: TPS2 shows 16% of closure
Top left: 0.5 is the difference between the ideal and real ratio of the TPS1 & TPS2 of 0.5%
Bottom left: Icoil = 0.46, It is the current consumption of the motor. 0.46 means a consumption of 0.46 Amps 5) Move the butterfly from end to end using the “+” button and the “-” button. The system will record the data that comes from the sensors in order to facilitate finding a problem if there is one. 6) Automatic mode:
In "Throttle" mode: If you press "+" and "-" simultaneously the throttle will automatically start to move from end to end. It will continue like this until you touch a button.
In "Search" mode: If you press "+" and "-" simultaneously you will be asked between which points the shutter should move. It is ideal for extensively testing an area of the TPS where you suspect an error.
This test will stop when you press any button 7) By pressing the OK button, you will see a complete report. Note: The throttle body must be connected BEFORE starting the test. Note: If the TPS are not recognized, the “Search” mode does not work
Report Reading
Report
Pressing OK the HMP1 will show a repport with all collected data.
Tracks type
Here is shown the type of accelerator and the formula applied to calculate the difference
Possible values are
t1 + t2 = 100
Standard throttle body
x2
Standard accelerator pedal
Toyota
Toyota Throttle Body
Unknow
Unknown throttle type, difference is always 0
Tps1
TPS1 integrity report with the following data.
Top left
You are looking at TPS1
Top right
Maximum continuity jump of the track.
Bottom left
Minimum measured value of the track.
Bottom right
Maximum measured value of the track.
The equipment makes 2000 readings per second at the TPS, continuity is the sharpest jump between 2 consecutive measurements, the objective is to try to discover if there is damage to the sensor track. In the image, the 2 most common TPS faults are marked with the letter C
All values are expressed in percentage
Todos los valores son expresados en porcentage
(The number in the photo is an example and is different for all throttle bodies)
Tps2
The data is similar to TPS1 but with data collected from TPS2.
Top right Maximum continuity jump of the track.
Bottom left Minimum measured value of the track.
Bottom right Maximum measured value of the track.
(The number in the photo is an example and can change in different accelerators)
Diff
Maximum difference: TPS1 and TPS2 have a ratio (different depending on the car). The difference is the error between the ideal relationship between TPS1 & TPS2 and what is actually measured in these sensors.
The HMP1 permanently monitors this difference and records what was the maximum difference and what was the position of both TPS when it occurred.
B
Max difference found
C
TPS1 Position
D
TPS2 Position
Note that different ECUs have different tolerances, but all factory tested throttles have less than 4% difference.
Isens
It is the current consumption of the TPS sensor set. This allows you to see if there is a cut track
TPS swap
The equipment can detect if TPS1 and TPS2 are reversed.
Generally it is an unalterable property of the throttle body, but a bad assembly could be exposed on this screen.
"no-swap"
It means TPS1 = TPS1 and TPS2 = TPS2
"Swap"
It means TPS1 = TPS2 and TPS2 = TPS1
Icoil max
Is the max current reached by motor during the test. To check overloads, shortcircuits or gear rusted.
Pol coil
Polarity of motor connections.
M1+ M2-
Means that throttle open when the voltage on M1 is greater than M2
M1- M2+
Means that throttle open when the voltage on M2 is greater than M1
Result
Is the final result taking care the max difference reached.
Diff<5%
Good
5<diff<8
Regular
Diff>8
Bad
NOTE: The result is only orientative, do not pretend replace the reading of other values.
There are throttle body like New Beatle or Chevrolet spark that are mixed, half electronic and half mechanic. In this case the TPS1 and TPS2 has no relationship so you need to check the numbers of report carefully.
