Pinpoint Test C: Noise, Vibration And Harshness

1. If a grabbing or shunting concern is experienced when the vehicle steering is at high lock, proceed to test step 2. For all other NVH  issues Go to  C2
2. Test the vehicle from cold replicating the customer's concern, allow vehicle to warm up and test again following the same driving style. Evaluate if the grabbing is coming from the front or rear wheels

Is the customer concern present at all times (warm and cold) and grabbing from the rear axle?

Yes 

GO to  C2

No 

Customer concern is present when the vehicle is cold and the front wheels are on high lock. This is a vehicle suspension characteristic due suspension mounts and bushings binding when cold. Component replacement will not repair the customer concern and NO  parts should be replaced. The characteristic should be explained to the customer that in cold conditions a grabbing/shunting may be experienced with high steering input at low speeds

1. Inspect all 4 wheels on the vehicle for the following issues:

• Correct tire size and installation
• Matching branded tires
• Even wear across the tires on the front and rear axle (Wear should be approximately the same across tires on the same axle)
• Damage to the wheel or tire (previous puncture repairs)
• Driveshaft and halfshaft installation (Check universal joints and constant velocity joints for wear and correct installation)

Were any issues identified from the list above?

Yes 

Rectify all known issues before continuing investigation. GO to  C7

No 

GO to  C3

1. Using the Jaguar Land Rover approved diagnostic equipment and the Inline Diagnostic Unit 2 (IDU2)/NVH  kit, complete the wheel balance application. Follow the instructions given on the application.
2. If an NVH  kit is not available, check the wheel balance of each wheel

Were any faults identified in the application? Or were any wheels out of balance?

Yes 

Rectify all known issues before continuing investigation. GO to  C7

No 

GO to  C4

1. Drain all oil from the transfer case and refill with new fresh oil to the correct specification. Refer to: TRANSFER CASE DRAINING AND FILLING . Using the Jaguar Land Rover approved diagnostic equipment complete routine - All Wheel Drive - Pump Venting
2. Drive the vehicle for at least 2km consisting of various corners at different speeds, including throttle applied and deceleration when cornering. Emulate parking maneuvers by using full steering wheel rotation slowly. Reevaluate the vehicle and test

Were any issues identified on the test drive?

Yes 

GO to  C5

No 

GO to  C7

1. Install a new transfer case actuator (T2H20181, LR093768) Always check and install the latest part number available.
2. Refill the transfer case with new fresh oil to the correct specification. Refer to: TRANSFER CASE DRAINING AND FILLING . Using the Jaguar Land Rover approved diagnostic equipment complete routine - All Wheel Drive - Pump Venting
3. Road test the vehicle and replicate the driving conditions where the customer concern was present

Were any issues identified on the test drive?

Yes 

GO to  C6

No 

GO to  C7

1. Replace the transfer case
2. Fill the transfer case with new fresh oil to the correct specification. Refer to: TRANSFER CASE DRAINING AND FILLING . Using the Jaguar Land Rover approved diagnostic equipment complete routine - All Wheel Drive - Pump Venting.
3. Road test the vehicle and replicate the driving conditions where the customer concern was present

Were any issues identified on the test drive?

Yes 

Raise a Technical Assist attaching all your findings and work completed so far

No 

GO to  C7

1. Road test the vehicle and replicate the driving conditions where the customer concern was present

Is the fault still present?

Yes 

GO to  C2. If all testing has been completed, raise a Technical Assist for further support attaching all your findings

No 

Repair is complete