Coolant Temp Flashing - Something a little different ....

[AngeloEvs]

The thing to remember is that there is a 'chip' inside the temp gauge. The flashing for a few seconds with ignition is a function of the gauges internal chip and it is this chip which controls the LED and the flashing sequence. The LSCU simply triggers this chip if coolant is lost or low.

The chip inside the gauge is very sensitive to the following faults all of which can cause random/permanent flashing problems even with the LSCU removed.

a) poor earths

b) short circuits in the temp sender wiring.

c) intermittent 12V feed to the insrument housing

d) intermittent 10v regulator.

e) the chip in the gauge is faulty or a poor internal connection (rare)

The two earths that can affect the temp gauges internal chip are:

a) the centre nut of the temp gauge - (loose securing nut, or poor contact with the flexible PCB, damaged PCB track.

b) the earth connection on the dashboard multiconnector.

Its also worth checking:-

a) that the 10v regulator is making good contact regards the socket it sits in - the legs frequently tarnish, and intermittent voltage output can trigger the chip in the temp gauge.

b) the outer nuts that secure and connect the temp guage to the pcb.