Quote:
Originally Posted by ah-kay
Get round to take a look at this problem and there is a tip or 2 I can share with the forum. The green line goes to the 5 control solenoids behind the Climate Control. It is a challenge to find out which one of the 5 pods is leaking. I find a quick way to do it.
1) Remove the 5 holding screws on the CCU faceplate. Move CCU aside but do not undo the 2 big plugs on either side.
2) T the Mityvac to the green line
3) Unplug ALL 5 connectors to the vacuum control solenoids.
4) Start the car and monitor the vacuum level, the level should be normal as all the vacuum solenoids are off ( not connected ).
5) Plug the connector back in one at a time. The vacuum would drop once the connector associated with the leaky pod is re-connected. You may need to vary the CCU setting to make sure the control solenoids are activated.
6) Optional - It is also possible to hook up 12v to the solenoid with a spare connector as the CCU setting may or may not energize the solenoid.
7) This method saves me a lot of time as the vacuum tube is a PITA to get to behind the CCU and I do not want to remove the glove box panel to test the pods.
I managed to locate solenoid number 1, the left-hand most one. The vacuum dropped once I re-connected the solenoid. It was so easy to identify the culprit. The pod is underneath the driver panel.
Any one can tell me what does #1 pod control?
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If by "underneath the driver panel" you mean just to the right of the driver's right foot, it's probably the defrost pod.
Or, it might even just be half of the defrost pod since there are two diaphragms in there. Or, just to confuse you, it might be the feed line from the center pod to the defrost pod since two lines actually go to that pod, but it is possible your diagnostics isolate the center+defrost line.
If it's the smaller pod in that area with one line, then it's the footwell flap actuator pod.
Scans of airflow for W123 climate control