Technical Information S300 Socketing

s300 Socketing

It is strongly recommended that you have this professionally installed as this is more difficult to install than an s200 and if the ECU has been previously socketed you run an even higher risk of damaging the ECU (lifting tracks and or burning them).  Socketing the s300 is very similar to the s100/s200. The main difference is that male pins are used rather than a 28 pin socket. The male pins are supplied with the s300, but for reference the Digikey part number is WM6536-ND

Socketing a new ECU:  http://www.hondata.com/images/ecuj12.jpg

  1. Take the ECU circuit board out the ECU case.
  2. De-solder IC4, install and solder in the 20 pin 74373 latch.
  3. De-solder J1, install and solder the supplied jumper.
  4. De-solder R54, install and solder the supplied resistor. Note: Not all ECUs require this step.
  5. De-solder IC3.
  6. De-solder CN2.
  7. Insert the male pins (1 x 4 pin, 2 x 14 pin) into the s300, install into the ECU and solder the pins.
  8. Cut J12
  9. Replace the large capacitor in C14 with the supplied capacitor

Socketing an ECU with an existing socket or chip:

  1. Take the ECU circuit board out the ECU case.
  2. De-solder IC3 and remove the socket / ROM.
  3. De-solder CN2. Optionally the polarizing tab of the 4 pin connector may be cut off and the existing 4 pin connector utilized.
  4. Insert the male pins (1 x 4 pin, 2 x 14 pin) into the s300, install into the ECU and solder the pins.
  5. Cut J12
  6. Replace the large capacitor in C14 with the supplied capacitor

Care must be taken when de-soldering not to lift tracks on the ECU circuit board.

s300j Socketing

It is strongly recommended that you have this professionally installed as this is more difficult to install than an s200 and if the ECU has been previously socketed you run an even higher risk of damaging the ECU (lifting tracks and or burning them).  Socketing the s300j is very similar to the s100/s200. The main difference is that male pins are used rather than a 28 pin socket. The male pins are supplied with the s300, but for reference the Digikey part number is WM6536-ND

Socketing a new ECU:

  1. Take the ECU circuit board out the ECU case.
  2. De-solder IC4, install and solder on the 20 pin 373 latch.
  3. Install and solder a jumper across J1 on the back of the ECU.
  4. De-solder IC3.
  5. De-solder CN2.
  6. Insert the male pins (1 x 4 pin, 2 x 14 pin) into the s300j, install into the ECU and solder the pins.
  7. Remove J4
  8. Replace the large capacitor in C27 with the supplied capacitor

Socketing an ECU with an existing socket or chip:

  1. Take the ECU circuit board out the ECU case.
  2. De-solder IC3 and remove the socket / ROM.
  3. De-solder CN2. Optionally the polarizing tab of the 4 pin connector may be cut off and the existing 4 pin connector utilized.
  4. Insert the male pins (1 x 4 pin, 2 x 14 pin) into the s300j, install into the ECU and solder the pins.
  5. Remove J4
  6. Replace the large capacitor in C27 with the supplied capacitor

Care must be taken when de-soldering not to lift tracks on the ECU circuit board.

The case must also be cut as shown below:

Before                                                                     After

Before                                                                     After

Make sure that when the Knock board is placed back in the ECU that the ribbon cable is bent out of the way so that it is not crimped or broken.