How does the glow plug work on a VW?

The glow plugs themselves are powered by a relay which is operated by a different part of the relay circuit and they generally stay on for a time after the LED goes out. If the coolant temperature is warm enough, the glow plugs and LED won’t be turned on at all in the “glow” position of the ignition switch.

When to shut off O2 sensor heater circuit?

Some computer systems will shut the O 2 heater circuit off until the codes are cleared. Now, with the ignition switch off, plug the test harness with the light into the vehicle’s O 2 sensor harness connection. The light should remain off until the engine is started. Once the engine is running, the light should come on steady or blink.

What should I do if my ignition module is overheating?

The car may stall, which would strongly suggest that ignition control module may be the cause of the overheating you’re experiencing. If you are caught with an overheated module in an emergency situation, you can cool it down with ice water, engine coolant, or refrigerant fluid.

What does the O 2 sensor heater driver do?

The computer is looking for 12V on the sensor’s negative control wire while the computer’s O 2 sensor heater circuit driver (the power transistor in the computer) is open. With the wire being grounded, the O 2 sensor heater circuit came on as soon as the ignition switch was turned on.

Why is the heater on my Volkswagen Caddy not working?

One of the most common (and inconvenient) problems with the Volkswagen Caddyis when it has no heatcoming from the heater. Not having a functioning heater makes driving much less comfortable, and can be a sign of certain issues. At the simplest level, there are two main reasons why the heater is not working.

Where are the fuse panels on a Volkswagen Caddy?

Here you will find fuse box diagrams of Volkswagen Caddy 2003, 2004, 2005, 2006, 2007, 2008, 2009 and 2010, get information about the location of the fuse panels inside the car, and learn about the assignment of each fuse (fuse layout).

How to replace a VW Sharan 02 glow plug relay?

You can’t post conmments that contain an email address. SOURCE: How do i replace my VW SHARAN 02 glow plug relay.

What to do if your car heater is not working?

A word of caution: If there is no coolant in your overflow, you can refill it by adding more to the overflow reservoir. There is almost never a situation where you would need to take the radiator cap off of the radiator to add coolant.