Instruments - Erratic Display Unit Operation
No: LTB00234Issue: 1
Date: 30 SEPT 2009
SECTION: 415
Integrated Head Unit Cycling Every 44 Seconds - Repair Procedure
AFFECTED VEHICLE RANGE
CONDITION SUMMARY:
Situation:
After turning the ignition 'ON', the audio system may boot up as normal and then perform the following cycle approximately every 44 seconds:
^ Audio sound cuts out
^ Navigation screen audio source icons 'gray' out
^ Orange LED on High Level Display Front (HLDF) flashes
^ Navigation screen defaults to the audio 'OFF' screen
^ The system will either reset to the Land Rover logo screen or reset the audio 'OFF' screen before recovering and starting the cycle again.
These issues may be caused by a software issue within the Integrated Head Unit (IHU) / Audio Front Control Module (ACM).
Action:
In the event of a customer concern of the above, refer to the Repair Procedure outlined below to update the ACM software.
PARTS:
No parts necessary
TOOLS:
IDS with latest IDS DVD Patch File; software first available on IDS DVD118.5 Patch File 14 Midtronics PSC-550 Vehicle Power Supply
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.
REPAIR PROCEDURE
RECONFIGURE THE INTEGRATED HEAD UNIT / AUDIO FRONT CONTROL MODULE
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 Midtronics PSC-550 Vehicle Power Supply must be connected to the vehicle battery during IDS diagnosis / module programming.
NOTE:
When performing module software updates, if IDS displays 'no update required', select 'tick', then select 'X' in the pop-up window to abort the routine.
1. Connect the Midtronics PSC-550 Vehicle Power Supply to the vehicle battery.
NOTE:
IDS must be loaded with software release DVD 118.5 with Patch File 14 or later.
2. Connect the IDS to the vehicle and begin a new diagnostic session by entering the correct VIN for the current vehicle.
3. Follow the IDS prompts to read the vehicle configuration.
4. When prompted 'Do you wish to read diagnostic trouble codes?' select 'No'.
5. Select 'tick' to continue.
6. When Content Model is displayed, select the 'Vehicle Configuration' tab.
7. From the Vehicle Configuration menu, configure the IHU / ACM by selecting:
^ 'Module programming' > 'Configure existing module' > 'Audio front control module'.
8. Follow all on-screen instructions until IDS displays the current and proposed software levels.
^ If 'Software update required' is displayed, select 'tick' to reconfigure the ACM, following all on-screen instructions to complete this task.
^ If 'No update required' is displayed select 'tick', then select 'X' in the pop-up window to abort the routine; exit the current session.
9. When completed, IDS will return to the Vehicle Configuration menu.
10. Exit the current session.
11. Disconnect IDS and the Midtronics PSC-550 Vehicle Power Supply from the vehicle.