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Asymmetric cooling (driver/passenger different temperature)

Q: What are the symptoms of Asymmetric cooling (driver/passenger different temperature) in Jaguar XJ (X350/X358)?

No cold air from vents. Different temperature on both sides of the cabin. No temperature adjustment capability

Q: How to fix Asymmetric cooling (driver/passenger different temperature) in Jaguar XJ (X350/X358)?

Replacement of the DCCV solenoid valve, verification of heater patency and repair (soldering) of the RCCM module board or its complete replacement.

in Jaguar XJ (X350/X358) (2003-2009)

Symptoms

No cold air from vents
Different temperature on both sides of the cabin
No temperature adjustment capability

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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

(X351)

Refrigerant: R134a Amount (g): 700g Oil: JLM12260 PAO 68 lub PAG ISO 46 Oil (ml): 110ml

See full specification

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