Toyota Service Hints For Refrigerant Leak Detection
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Use of electronic leak detectors for checking A/C systems refrigerant leakage is the only method approved by Toyota. This type of leak detector is sensitive not only to refrigerant, but also sensitive to numerous petrochemical substances (motor oil, gasoline, solvents, etc.) commonly found in a repair shop environment. Because this sensitivity could diminish the leak detector’s capacity for accurate leak detection, some service hints have been provided to help increase the accuracy of your diagnosis. SERVICE HINTS: 1. Visual Inspection: Do a quick visual inspection under the hood for signs of refrigerant leakage. Check for areas of heavy oil leakage at block and piping joints. Many times these areas have accumulated road dust and dirt.
Use of electronic leak detectors for checking A/C systems refrigerant leakage is the only method approved by Toyota. This type of leak detector is sensitive not only to refrigerant, but also sensitive to numerous petrochemical substances (motor oil, gasoline, solvents, etc.) commonly found in a repair shop environment. Because this sensitivity could diminish the leak detector’s capacity for accurate leak detection, some service hints have been provided to help increase the accuracy of your diagnosis. SERVICE HINTS: 1. Visual Inspection: Do a quick visual inspection under the hood for signs of refrigerant leakage. Check for areas of heavy oil leakage at block and piping joints. Many times these areas have accumulated road dust and dirt.
2. Inspection with leak detector:
NOTE: Make sure the system is fully charged. Operate the system to
increase refrigerant pressure. Shut the system off before inspecting
with leak detector. A. Checking for leakage at block and piping
joints: Wipe the oil/dirt accumulation off the joints with a clean rag.
Do not use solvents to clean the joints. Refrigerant is heavier than air
so start checking for leaks with the detector wand about 1/4 inch below
the joint. Move the wand slowly across and around each joint (see
illustration below). Move detector wand slowly across and around each
joint. Piping Joint
The leak detection lanot only solve the visible problem that is the cause of a leak but they also go further to deal with the main source of a rain or water leak. These experts know that before a leak is visible it must have come from a source which can be repaired at once to deal with the larger problem. Many leak repairers only seal the top surfaces of leaking areas such as floors and walls without addressing the interior sources of leaks but this is not what the experts from AM & C do.
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