HVAC - No Change In Blower Speed Selecting Recirculation
LTB00421NAS214 FEB 2012
ISSUE '2' CHANGES ARE HIGHLIGHTED IN GRAY
SECTION: 412
HVAC Blower Speed Does not Change After Selecting 'Recirculation'
AFFECTED VEHICLE RANGE:
LR4 (LA)
VIN: CA596988 - CA608751
Model Year: 2012
Range Rover Sport (LS)
VIN: CA717166 - CA731558
Model Year: 2012
CONDITION SUMMARY:
Situation:
The Heating Ventilation Air Conditioning (HVAC) blower speed may not change after selecting the recirculation button. This may be caused by the HVAC control module not recognizing messages transmitted from the Front Controls Interface Module (FCIM).
Action:
In the event of a customer concern of the above, refer to the Repair Procedure outlined below to update the HVAC control module software.
PARTS:
No parts necessary
TOOLS:
IDS with latest IDS-DVD and Calibration File; first available on IDS-DVD128.02 Calibration File v90
Land Rover-approved Midtronics Vehicle Power Supply
Refer to Workshop Manual for any required special tools
WARRANTY:
NOTE:
Repair procedures are under constant review, and therefore times are subject to change; those quoted here must be taken as guidance only. Always refer to DDW to obtain the latest repair time.
DDW requires the use of causal part numbers. Labor only claims must show the causal part number with a quantity of zero.
Normal Warranty policies and procedures apply
REPAIR PROCEDURE
UPDATE THE HVAC CONTROL MODULE SOFTWARE
CAUTION:
Ensure all ignition :"ON" / ignition "OFF" requests are carried out; failure to perform these steps may cause damage to control modules in the vehicle.
CAUTION:
A Land Rover-approved Midtronics Vehicle Power Supply must be connected to the vehicle battery during IDS diagnosis / module programming.
1. Connect the Land Rover-approved Midtronics Vehicle Power Supply to the vehicle battery.
2. Turn ignition ON (engine not running).
NOTE:
IDS must be loaded with IDS-DVD128.02 v90 or later.
3. Connect the IDS to the vehicle and begin a new Symptom Driven Diagnostics (SDD) session.
4. Follow the on-screen prompts, allowing SDD to read the VIN and identify the vehicle.
5. From the Session Type selection screen, choose 'Diagnosis'.
6. Select the Selected Symptoms tab, and then select:
^ Electrical > Climate control system > Blower operation > Blower speed inoperative
7. Select 'continue'.
8. Select the Recommendations tab.
9. From the Recommendations tab, select Run to Configure existing module - Heating ventilation and air conditioning control module
^ Follow all on-screen instructions to complete this task.
10. Exit the current session.
11. Disconnect the IDS and the Midtronics Vehicle Power Supply from the vehicle.
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