Engine Controls - Idle Vibration With A/C ON

No: LTB00214

Issue: 1

Date: 28 AUG 2009

SECTION: 303

Engine Vibration at Idle in Park / Neutral During Air Conditioning Operation - Repair Procedure

AFFECTED VEHICLE RANGE:
Range Rover (LM) Naturally Aspirated only VIN: 6A194480 - 9A306629
Model Year: 2006 - 2009

CONDITION SUMMARY:

Situation:

An engine vibration may be transmitted through the body of the vehicle with the engine at idle and the transmission in either Park (P) or Neutral (N) when the air conditioning compressor engages / disengages. This may be caused by idle speed sensitivity based on inputs received from the Heating Ventilation Air Conditioning (HVAC) system.

Action:

In the event of a customer concern of the above, refer to the Repair Procedure outlined below to update the Engine Control Module (ECM) software, check the Transmission Control Module (TCM) software, and if necessary update the TCM software.

PARTS:

No parts necessary; information only

TOOLS:

IDS with latest DVD Patch File; software first available on DVD118 Patch File 1

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

CONFIGURE THE ENGINE 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 diagnosis.

1. Connect the Midtronics PSC-550 power supply to the vehicle battery.

NOTE:
IDS must be loaded with software release DVD 118 with Patch File 1 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 ECM by selecting: 'Module programming' > 'Configure existing module' > 'Petrol powertrain control module'.

8. Select 'tick' to continue, following all on-screen instructions to complete this task.

9. When completed, IDS will return to the Vehicle Configuration menu.

VERIFY TRANSMISSION CONTROL MODULE SOFTWARE; CONFIGURE IF NECESSARY - 2006-2007MY ONLY

1. From the Vehicle Configuration menu, verify the TCM software by selecting: 'Module programming' > 'Configure existing module' > 'Transmission control module'.

2. Select 'tick' to continue.

3. 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 TCM.

^ If 'No update required' is displayed select 'tick', then select 'X' in the pop-up window to abort the routine: continue to step 5

4. Follow all on-screen instructions to complete this task.

^ IDS will return to the Vehicle Configuration menu when completed.

5. Exit the current session.

6. Disconnect IDS and the Midtronics PSC-550 Vehicle Power Supply from the vehicle.