03 April 2011

Throttle Position Sensor replacement

My TPS sensor was giving erratic readings at times, which cause hesitation at low throttle.  This can be solved by using HONDATA TPS calibration function.  This can be quite irritation when the hesitation comes back and I dont have my laptop ready with me. 

With the TPS disconntected. The readings should within the following specification.
Pins 1 and 2 = 0.5K-0.9K ohms
Pins 2 and 3 = 3.6K-5.4K ohms

Pin 1 is the bottom pin.

My TPS sensor was out of range as expected.
Since Honda does not sell the TPS alone (You have to get the Throttle body with TPS as a package from Honda and it is very costly!!), I manage to get a Blox replacement instead.

There is only 2 screw holding the TPS in position. For those"virgin" throttle body, the original screw used by honda does not allow it to be remove using normal tools.  U can either try to unscrew it using "chipping" method or use a plier to turn the screw instead.


The installation is slightly tricky.  If u look as the sensor closely, u will notice the plastic tab protruding.  This is suppose to be align with the groove in the throttle-body, if not the readings will be way off.  

The position of the TPS shown on top is approximately where the protrusion will line up with groove in the throttle body.

This will be the position when u plug in the TPS at first.  

Next adjust the position of the TPS until u get the following reading with ign on. The voltage between Pins 1 and 3 should be:
0.5volts with the TB closed
4.5volts with the TB fully open

In my case, I used Hondata SManager as a reference for my adjustment. 

Once u are happy with the reading, tighten down the TPS with two new screw that came with the Blox TPS or some screw with m5 thread.

1 comment:

  1. Thanks for this blog
    Position sensing is also used in automobile.

    Distance Sensor