How to Reset Volvo Climate Control Module Problem with VIDA Dice?

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A/C – Vent Temperature Cycles From Hot to Cold

 

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 Dice

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.

 

  1. 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.

 

  1. Use VIDA to read CCM DTCs.
  2. 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.

EXAMPLE OF GRAPHIC DISPLAY IN VIDA OF THE PROBLEM

Warranty Claim Information

Credits to @vfgilber on volvoforums.com

 

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