What are the symptoms of Slow loss of refrigerant or A/C system leakage in Toyota Avensis?

Air conditioning works intermittently. Frost or ice on pipes under the hood. Problem after collision or accident

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Slow loss of refrigerant or A/C system leakage

Q: How to fix Slow loss of refrigerant or A/C system leakage in Toyota Avensis?

The system should be completely emptied, a long and deep vacuum drying (at least 45 minutes) should be carried out to evaporate the moisture, the filter-drier should be replaced and the system should be filled with fresh refrigerant and oil. Most often, the problem occurs in cars after unprofessional post-accident repairs or a long drive with a leaky, open system.

in Toyota Avensis (2000-2020)

Symptoms

Air conditioning works intermittently
Frost or ice on pipes under the hood
Problem after collision or accident

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Technical diagnosis (Premium)

Recognized technical fault:

Auxiliary controller voltage instability detected

Technical analysis

Detailed analysis of HVAC controller operation parameters, CAN bus data readings, and diagnostic signal waveforms. Purchase PRO access or log in to read the full fault analysis.

Confirmed solution

Complete step-by-step repair procedure including module non-volatile memory reset, sensor calibration, and correct wiring routing. Unlock the full report to see the instruction.

Parts needed

Filters ferrite anti-interference / noise suppressor
Auxiliary starting battery (depending on cell status)

Workshop hacks

Important workshop tips for mechanics regarding bypasses without expensive control module replacement and manufacturer software service bulletins.

TSB / TPI service bulletins

TSB-24-HVAC-01TPI-2068943/2

A/C Technical Specifications

(T27)

Refrigerant: R134a Amount (g): 440g Oil: ND8 PAO 68 lub PAG ISO 46 b.d. Oil (ml): b.d.ml

(T25)

Refrigerant: R134a Amount (g): 410 – 470g Oil: ND8 PAO 68 lub PAG ISO 46 b.d. Oil (ml): b.d.ml

Verso

Refrigerant: R134a Amount (g): 470 – 530g Oil: ND8 PAO 68 lub PAG ISO 46 b.d. z Oil (ml): b.d.ml

See full specification

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