Here share a case about Vida Dice solve Volvo A/C control module problem.
Situation: 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: Volvo 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.
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.
EXAMPLE OF GRAPHIC DISPLAY IN VIDA OF THE
PROBLEM
Warranty Claim Information
Credits to @vfgilber on volvoforums.com
Working Volvo Vida Dice 2014D for sale
