Editing Normal running temperature (section)

== Temperature senders == 

The S1 has two [[Temperature sender]]s: brown (sends to ECU), blue (sends to dash).  The blue temperature sender is notoriously unreliable and often fails, resulting in temperature readings approx 10°C lower than reality.  The blue sender is also a "single wire" type which is affected by electrical load.  In most cases, a 1°C rise in temperature can be seen when turning on each item of electrical equipment, e.g. headlights, heater fan, windscreen wipers.

The S2 (Rover engine) has a single (black) temperature sender for both ECU and dash.  There is a legacy blue housing, part #A111E6047S as in the S1, but it does nothing.

The S2 and S3 (Toyota engine) has a single black temperature sender, although different part numbers in the 1Z and 2Z engines.

[[Category:Engine Cooling]]