Probleme de chaufrette XC90 2006

J'Ai un probleme de chaufrette sur mon xc90. quand le chauffage est a chaleur maximum il y a des variations chaud puis ensuite froid ... chaud puis ensuite froid, Ca semble intermitent car parfois la chaleur revient a 100%. Est ce que quelqu'un d'entre vous peut m'aider?

Merci

[thepooh]

Bonjour.

Il y a un bulletin pour ce problème pour quelques modèles (S60, S80, V70, XC70, XC90)

Ca prend une recalibration du système de ventillation et ca prend environ 10 minutes avec VIDA

Bone chance !

NO: 87-54
DATE: 11-30-2005
MODEL: S60, S80, V70, XC70, XC90
MY: MY05 MY06
SUBJECT: Temperature Coming Out of the Climate Vents may Start to Cycle from Max Hot Back to Full Cold When Max Hot is Requested.
REFERENCE: VIDA
This Tech-net note supersedes the previous 87-54 dated 11-02-2005. Please update your files.
DESCRIPTION:
If the temperature knobs are turned to max hot, the temperature coming out of the climate vents may start to cycle from max hot back to full cold with a period of 4-15 seconds. No Diagnostic Trouble Codes (DTCs) are stored.
The number of steps on a temperature Damper Motor Module (DMM) may have increased from factory settings, causing the affected DMM to set a "not calibrated" flag to the Climate Control Module (CCM). This causes the climate system to self-calibrate over and over again resulting in the cycling temperature from the vents.

VEHICLES AFFECTED:
SERVICE METHOD:
The above mentioned symptom could be solved by a recalibration of the CCM.
For affected vehicles that are still in retailer stock, upgrade the cars during CPS or prior to customer delivery following the service method in VIDA:
1. Erase CCM DTCs.
2. Perform calibration of the CCM as follows:
- Select the "Diagnostics" tab followed by the "Vehicle communication" tab.
- Click the CCM box.
- Select the "Advanced" tab.
- Click "Checking LIN bus".
- Click "No" if no Damper Motor Module (DMM) has been replaced.
- Read and follow the instructions (to the right) carefully and click the VCT2000 symbol.
- Click the "Start" button (left on screen tool).
- Wait until status "Completed" is shown on the screen tool.
- Regardless of DTCs or no DTCs it is now OK to click the "Hide" button to continue.
- Click the "Continue" button to proceed.

3. Perform functional check of the climate system as follows:
- Start engine.
- Turn FAN speed to MAX.
- Select DEMIST and check airflow to windscreen.
- Select FLOOR and check airflow to floor.
- Select VENT and check airflow to dashboard vents.
- Turn to MAX COLD and check cold air from dashboard vents left and right.
- Turn to MAX HOT and check hot air from dashboard vents left and right.
- Turn temperature and fan speed controls to midrange.
- Select Recirculation and check difference in airflow noise in climate system.
- Switch off Recirculation and check difference in airflow noise in climate system.

4. Use VIDA to read CCM DTCs.
5. If CCM DTCs are present repeat step 1 to 4. If CCM DTCs are persistent after the third attempt, perform fault tracing according to VIDA.

[cash]

merci beaucoup !