What is the DCCV?
DC cardioversion (DCCV) is used to treat irregular heart rhythms (commonly atrial fibrillation). The procedure involves a general anaesthetic and placement of electrodes on the chest. An electrical impulse is passed across the electrodes to return the heart rhythm to normal.
How to replace the DCCV on a Jaguar?
The power plug to the DCCV. It is a little hard to get to and not easy to remove. Be patient and take your time. The information below is my procedure to replace the DCCV and the evaluation of the valve and what I found to be the cause. Installed the DCCV and all was good. Heat again!!
How to diagnose a heater leak in a Jaguar?
1. Unbolt the Coolant/Water Expansion Tank, set it aside so it doesn’t block access to the Heater Valve. 2. Loosen the bolt that secures the Heater Valve to the car. 3. Rotate the Heater Valve to get access to its connector. Procedure A (This one is messy. We recommend that you do Procedure B instead.):
Why is the solenoid on my Jaguar heater not working?
It is an active low circuit, so when the DCCV sees Ground at either the LH and/or RH pin, the respective solenoid within the DCCV activates. Case 1: Temperature setting “Lo” = CCM output ON (grounded) = solenoid ENERGZIED = solenoid valve CLOSED = coolant flow to heater core impeded = heater core NOT HOT when A/C is ON.
Why is my Jaguar climate control valve not working?
If this condition is not attended to the result could be that the valve solenoids can draw excessive current and damage the Air Conditioning Climate Control Module (CCM) circuit board. Earlier models apparently were more tolerant to the higher currents and less likely to be damaged. http://www.jagtv.co.uk/videos/jaguar-… Loading…
The power plug to the DCCV. It is a little hard to get to and not easy to remove. Be patient and take your time. The information below is my procedure to replace the DCCV and the evaluation of the valve and what I found to be the cause. Installed the DCCV and all was good. Heat again!!
1. Unbolt the Coolant/Water Expansion Tank, set it aside so it doesn’t block access to the Heater Valve. 2. Loosen the bolt that secures the Heater Valve to the car. 3. Rotate the Heater Valve to get access to its connector. Procedure A (This one is messy. We recommend that you do Procedure B instead.):
If this condition is not attended to the result could be that the valve solenoids can draw excessive current and damage the Air Conditioning Climate Control Module (CCM) circuit board. Earlier models apparently were more tolerant to the higher currents and less likely to be damaged. http://www.jagtv.co.uk/videos/jaguar-… Loading…
It is an active low circuit, so when the DCCV sees Ground at either the LH and/or RH pin, the respective solenoid within the DCCV activates. Case 1: Temperature setting “Lo” = CCM output ON (grounded) = solenoid ENERGZIED = solenoid valve CLOSED = coolant flow to heater core impeded = heater core NOT HOT when A/C is ON.