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DTC C1100 00: Brake Booster Vacuum Sensor Performance .
Do you know what the brake booster is ?
Circuit/System Description
The electronic brake control module (EBCM) provides a power 5-volt reference to the brake booster vacuum sensor. The brake booster vacuum sensor converts the change in vacuum levels in the brake booster into a voltage signal. This signal is sent to the EBCM. The voltage signal ranges, from 0.13 to 3.30 volts depending on vacuum levels. The low reference is the return side of the sensor to ground.
Conditions for Setting the DTC
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Voltage at the brake booster sensor signal output to the EBCM falls outside the 0.13 to 3.30 volts range for more than 200 milliseconds.
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The power 5-volts reference is shorted to ground or battery positive.
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Toyota C1100 Possible Solution :
The crankshaft sensor signals the fuel injection computer or the ignition control when the cylinders are firing. This causes the ignition coil to provide a spark and the injector to inject fuel into each cylinder at the right time.If either sensor isn't working correctly, the car will run rough and the engine will be less efficient. In later car models, the car's computer can usually keep the vehicle running, but the engine warning light on the dashboard goes on to warn the driver
Got squeaky brakes, hey. Or is it chirping? Squeaky brakes are fairly common on
vehicles that have all four wheels that are disk. Now, chirping is a different
story, it could mean that you will need new disk pads and possible have the
rotators turns and if the can't turn the rotators then they need to be replaced.
Squeaky brakes, glazing on the pads, pad dust, little rocks, brake spiders,
loose adjust spring, and many other possibilities. GB...stewbison
Chatter is caused by brake pad vibration, they make a paste that you put on the back of the brake pads to reduce it or make it go away, another thing that causes it is the rotors were no finished properly when they were turned, another issue is poor quality brake pads, I have always used Wagner or Raybestos brand they are the best and have anti squeak/chatter materials in the pad material.
Do you mean warping, as in, not round? If so, here are a few possible reasons and solutions. If the brake caliper is pulsating when you depress the pedal, it could cause warpage of the rotor. Solution - replace caliper and brake pads and have the rotor turned. If one side of the vehicle's brakes, or misc. parts, were recently replaced and not the other, if could cause uneven wear on the rotor. Solution - replace brake pads, and/or matching parts on the old/other side and have the rotor turned. There are several more possibilities but there's a starting point for ya.
The brakes. It goes off because your brake fluid has gone below the minimum level, and sets the sensor off. Before you go adding brake fluid, what it REALLY means is that your brake pads are so worn down that the brake pistons in your calipers are extended all the way in order to make contact with the rotors. Therefore, the amount of fluid in your reservoir is low. Replace your brake pads, and see if you also need your rotors shaved/replaced because you let them go so far. Personal note: On older cars, the brake fluid is supposed to be replaced every 3 years. See if it needs a flush. If you can, drain out all the old DOT 3 brake fluid and replace it with synthetic DOT 3 or the newer DOT 4.
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