TCS

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Original submission by T Apr 12th 2007:

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Transmission Control Switch:

Operation:

The TCS is found on late HX, late LX, HZ, VB, and UC's as part of the emission control.

The Transmission Control Switch (TCS) is mounted on the Gearbox and only permits Vacuum Advance to the Distributor when the vehicle is in Top Gear and the Engine is hot.  The purpose of it is to reduce emissions during the warmup phase. The TCS is placed in series with the Cold Feed Switch (CFS) switch mounted on the Engine so that full Vacuum Advance is only available when the Engine is at or above 65 degrees in temperature and the Car is in Top Gear. 

TCS On Manual Gearbox:

The TCS is mounted under on of the Selector Levers on a Manual Gearbox. 
The Transmission Control Switch on a Manual Gearbox from HX and later. This is the side plate of an Aussie 4 speed. The TCS is mounted on the 3rd and 4th selector shaft. Click to Enlargen. Photo by TomKelly88.
 

TCS On Trimatic Gearboxes:

The TCS is mounted on the nearside (passenger side) rear of a Trimatic Gearbox. 
Early style 6 Cylinder Trimatic Gearbox. Note the Top Gear Switch (nearside rear of gearbox). Click to Enlargen. Photo by Jason.
 
Cold Feed Switch from HX - VB. The Switch prevents Throttle controlled Vacuum  from reaching the Distributor until the Engine is above 63 degrees Celsius. Photo by T. Click to Enlargen.
  

Cold Feed Switch:

The Cold Feed Switch from HX - VB. The Switch prevents Throttle controlled Vacuum  from reaching the Distributor until the Engine is above 63 degrees Celsius by preventing the Vacuum Advance Control Solenoid from operating.

Photo showing the position of the Cold Feed Switch (circled upper) on an HX - VB red Engine. Click to Enlargen. Photo by Ruski.

Links:

Cold Feed Switch  

Terms:

Terms

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