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No automatic air conditioning temperature control

Q: How to fix No automatic air conditioning temperature control in Lexus Modele z Auto-A/C?

Ignore the Solar Sensor DTC error read inside workshop premises. A proper test requires taking the car out into full sun or exposing the sensor on the dashboard to strong outside light. If the error does not disappear in daylight, the element should be replaced.

in Lexus Modele z Auto-A/C

Symptoms

Weak cabin cooling

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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

Refrigerant specifications for this model are available in the catalog.

Open refrigerant database

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