Making the TPS Harness

Making the TPS Harness http://web.me.com/willm/Site/Photo_Albums/Pages/TPS_Harness.html The TWM throttles come with a nice throttle position sensor (TPS). The pigtail harness comes unassembled. The stock Miata wiring harness has 4 wires, this one has 3. The difference? The stock Mazda unit’s 4th wire sends a signal for idle. Not needed for the IRTB’s. Here’s how I made mine. I’m in hurry-up mode and took minimal pictures. Here’s the assembled TPS pigtail. I used some left-over TXL wire from a former Megasquirt build. http://web.me.com/willm/Site/Photo_Albums/Pages/TPS_Harness.html#0 acbbd820-8622-480a-ae12-3459e4e54d84 http://web.me.com/willm/Site/Photo_Albums/Pages/TPS_Harness_files/Media/IMG_0679.jpg?derivative=thumb http://web.me.com/willm/Site/Photo_Albums/Pages/TPS_Harness_files/Media/IMG_0679.jpg?derivative=micro

http://web.me.com/willm/Site/Photo_Albums/Pages/TPS_Harness_files/Media/IMG_0679.jpg?derivative=mip

<div style="padding: 0px; " class="image_cluster_layout_style_default_External_191_30"><div class="image_cluster_layout_style_default"><p style="padding-bottom: 0pt; padding-top: 0pt; " class="Caption">I’m in hurry-up mode and took minimal pictures.  Here’s the assembled TPS pigtail.  I used some left-over TXL wire from a former Megasquirt build.</p></div></div> As the picture says, the TPS needs to get +5v, ground, and sends a signal out. Luckily, all 3 are available on the stock TPS harness! http://web.me.com/willm/Site/Photo_Albums/Pages/TPS_Harness.html#1 9f07d1b3-7f6a-4c79-a64f-61a17066558c http://web.me.com/willm/Site/Photo_Albums/Pages/TPS_Harness_files/Media/IMG_0680.jpg?derivative=thumb http://web.me.com/willm/Site/Photo_Albums/Pages/TPS_Harness_files/Media/IMG_0680.jpg?derivative=micro

http://web.me.com/willm/Site/Photo_Albums/Pages/TPS_Harness_files/Media/IMG_0680.jpg?derivative=mip

<div style="padding: 0px; " class="image_cluster_layout_style_default_External_191_30"><div class="image_cluster_layout_style_default"><p style="padding-bottom: 0pt; padding-top: 0pt; " class="Caption">As the picture says, the TPS needs to get +5v, ground, and sends a signal out.  Luckily, all 3 are available on the stock TPS harness!</p></div></div> TWM harness on left, stock on right. http://web.me.com/willm/Site/Photo_Albums/Pages/TPS_Harness.html#2 3269abc6-9e40-45c1-a6e4-c5f02bf7fc37 http://web.me.com/willm/Site/Photo_Albums/Pages/TPS_Harness_files/Media/IMG_0681.jpg?derivative=thumb http://web.me.com/willm/Site/Photo_Albums/Pages/TPS_Harness_files/Media/IMG_0681.jpg?derivative=micro

http://web.me.com/willm/Site/Photo_Albums/Pages/TPS_Harness_files/Media/IMG_0681.jpg?derivative=mip

<div style="padding: 0px; " class="image_cluster_layout_style_default_External_191_30"><div class="image_cluster_layout_style_default"><p style="padding-top: 0pt; " class="Caption">TWM harness on left, stock on right.<br/></p></div></div> I covered the harness with the expandable fire-resistant sleeving as used in the rest of the engine compartment. http://web.me.com/willm/Site/Photo_Albums/Pages/TPS_Harness.html#3 822508e0-8a88-423f-a530-90d4aec2bda1 http://web.me.com/willm/Site/Photo_Albums/Pages/TPS_Harness_files/Media/IMG_0682.jpg?derivative=thumb http://web.me.com/willm/Site/Photo_Albums/Pages/TPS_Harness_files/Media/IMG_0682.jpg?derivative=micro

http://web.me.com/willm/Site/Photo_Albums/Pages/TPS_Harness_files/Media/IMG_0682.jpg?derivative=mip

<div style="padding: 0px; " class="image_cluster_layout_style_default_External_191_30"><div class="image_cluster_layout_style_default"><p style="padding-bottom: 0pt; padding-top: 0pt; " class="Caption">I covered the harness with the expandable fire-resistant sleeving as used in the rest of the engine compartment.</p></div></div> I didn’t take pictures, but I used a multi-meter on the stock harness to determine the correct wires to use. A little splice here, and a little splice there, and I was done. No more TPS reports! http://web.me.com/willm/Site/Photo_Albums/Pages/TPS_Harness.html#4 292aec99-307f-4315-bd35-470e916bf9ab http://web.me.com/willm/Site/Photo_Albums/Pages/TPS_Harness_files/Media/IMG_0683.jpg?derivative=thumb http://web.me.com/willm/Site/Photo_Albums/Pages/TPS_Harness_files/Media/IMG_0683.jpg?derivative=micro

http://web.me.com/willm/Site/Photo_Albums/Pages/TPS_Harness_files/Media/IMG_0683.jpg?derivative=mip

<div style="padding: 0px; " class="image_cluster_layout_style_default_External_191_30"><div class="image_cluster_layout_style_default"><p style="padding-bottom: 0pt; padding-top: 0pt; " class="Caption">I didn’t take pictures, but I used a multi-meter on the stock harness to determine the correct wires to use.  A little splice here, and a little splice there, and I was done.  No more TPS reports!</p></div></div>