Engine temp warning light.

[VS_Pete]

Hi all,
Got new inlet manifold gaskets done and a new temp. sender to gauge aswell.
Everything is running fine and but the warning light comes on (stays on for about 5secs) just over 3/4 and goes no further high fan kicks in needle comes down.
I have tested the low/high fan ok.
No air in system.
When I first got the car like 2 days old the light,beeper and needle were on the red the car wasn`t bled properly fixed that so I know where is no air in system.
I think everything is fine and I will just have to live with the new sensor.
Ideas???????

 

[BowTie]

Bleed again, for good measure, with 2-5 litres of water in a container pressed into the rad cap hole.

Use gravity to pressurise the system while you run the car and cycle the thermostat a few times.

 

[The1]

check the voltage on the sensor wires should be around 5 volts.

Check the sensor resistance.

at 70c 0.474k ohms
at 90c 0.244k ohms
at 100c 0.180k ohms

The temp gauge between 1/4 and 1/2 should relate to 87 - 94 Deg C sensor temps.

Standard Memcal LOW Thermo fan kicks in at 104c and cuts out at 100c HIGH fan kicks in 109c out at 105c

 

[VS_Pete]

I haven`t got a tester or know how to use one.
Did a code check.
Code 15 - Coolant temperature Sensor high voltage
So does that mean the Coolant temperature Sensor is no good and have to replace it?

 

[hako]

Can you shove the old one back in?....I thought it was the other sensor that turned the "DANGER HOT" warning on, but looks like I'm wrong. Your post indicates you replaced both sensors?
I've never had trouble with airlocks in Ecotecs...just drained them and refilled, checked then OK. I'd ignore the code 15 - wipe it and see if it comes back before worrying about it.
Peter....you know you are asking for trouble doing this sort of work on your car before Xmas....just asking for trouble!!

 

[VS_Pete]

Peter....you know you are asking for trouble doing this sort of work on your car before Xmas....just asking for trouble!!
Don`t know what you are talking about Merry Xmas hako.

The wireing to the Temp sensor is very tight GM just gave enough wire so I think I have broken the wire in the loom or at the plug.

The gauge is right the sensor to ecu is wrong or wiring I think or I ####ed the pins in the sensor which I think I have done.
In other words the lead needs to be longer.

 

[VS_Pete]

Only the Temp sender replace this time

The car is driveable

 

[VS_Pete]

I`ll reset the ecu after I have pork,ham,chicken and beers.lol

 

[VS_Pete]

Reset code fault gone car the same got this from another site.

Temperature sender unit - The temperature sender unit used in VS V6's was caried over from VR's, but the location was changed to a hotter part of the engine. This may cause higher temperature readings on the gauge before the thermo fan cuts in. In mid 1997, the sender unit was revised to suit the new engine position and engine temperatures, which show a lower reading on the guage before thermo fan activation.

So I will see what work can tell me on wednesday I hope they tell me I got the old type sender I`ll let you know what I find out.

 

[VS_Pete]

Funny went to another parts shop on saturday but owner not there and shop closed except for a mate of his working on his 4b he told me the same story about the sender.