How do you test the coolant in a Jaguar?
Start and run the engine to full warm up. Turn off the engine, and remove the connector from the CTS. Test as per above. Testing the CTS on the vehicle requires some method to measure the engine or coolant temperature. An infrared temp gun is useful, aimed at the thermostat housing on the B bank side.
Why is the coolant sensor on my Jaguar not working?
The CTS pin contacts, and the wiring harness contacts are also prone to failure due to corrosion. Failure of any of these items, will cause a no start, a hard start, or if the engine starts, poor idle, or overfueling, and a possible shut down of the engine shortly thereafter.
Why is the CTS on my Jaguar not working?
The CTS, the harness wiring, and the harness connector, are all prone to failure. The CTS pin contacts, and the wiring harness contacts are also prone to failure due to corrosion.
How is coolant temperature measured in an engine?
The CTS “measures” coolant temperature, as a heat resistance value, and transmits that value to the engine ECU, The value is measured in ohms resistance. The mapping table within the ECU interprets the resistance value as engine coolant temperature. A cold engine requires more fuel.
What should I do if my Jaguar overheats?
A hard or expired rubber seal on the radiator caps or an under-rated (3 lb or 8 lb) pressure cap on the overflow tank.
What causes a Jaguar V-12 engine to overheat?
It has been Kirby Palm’s impression that faulty ignition timing is a major contributor to Jaguar’s reputation for overheating: If the timing of the V-12 is retarded it will overheat BIG TIME. This is supposedly true of most cars but I have never seen it happen the way it happens on the H.E. V-12 5.3 litre engine.
What’s the boiling point of coolant in a Jaguar?
The same goes for your cooling system. When your system operates at it’s rated 15 psi pressure (XJ6 Series III) the boiling point of the coolant circulating inside of your head and block is much higher than if your system is operating at ambient pressure.
When to test a low or high speed fan?
Cooling fan motor testing (low and high speeds), relays, harness connectors…it’s all here. Generally, the low speed fan kicks on when the A/C is turned on or when the coolant temperature hits around 200 degrees F. High speed kicks on around 220F.