High Priority 100% confidence

Air conditioning stopped cooling / no response to AC button

Q: How to fix Air conditioning stopped cooling / no response to AC button in Toyota Yaris Hybrid?

Replacing a seized/short-circuited electric compressor. FLUSHING of the entire system is required to remove any remaining conductive PAG oil before installing the new compressor.

in Toyota Yaris Hybrid (2012-2024)

Symptoms

Air conditioning does not turn on

Verifying license...

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

Refrigerant: R1234yf Amount (g): 350-400g Oil: PAG YF ISO 46 Oil (ml): 80 - 110ml

(P13)

Refrigerant: R134a Amount (g): 360g Oil: ND8 PAO 68 lub PAG ISO 46 Oil (ml): 60ml

Hybrid

Refrigerant: R134a Amount (g): 435g Oil: ND11 POE 125 Oil (ml): b.d.ml

See full specification

Have this problem?

Generate a personalized AI report for your Toyota Yaris Hybrid or book a workshop visit.

Generate AI report Schedule visit