Step 1: Check for NVH concerns from non-steering components, which may sound like noises coming from the steering system.
Power assisted steering operating condition |
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Parking | Driving | ||
Steering central/slightly off center | Steering at a steering lock stop | Driving straight ahead | Cornering condition |
REFER to NVH concerns from other components column A | REFER to NVH concerns from other components column B | REFER to NVH concerns from other components column C | REFER to NVH concerns from other components column D |
NVH concerns from other components
Step 2: Check for steering system NVH concerns according to operation condition described at the customer interview.
Power assisted steering operating condition |
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Parking | Driving | Vehicle stationary with engine off | |||
Steering central/ slightly off center | Steering at a steering lock stop | Steering central/slightly off center | Steering at a steering lock stop | Steering central/ slightly off centre | Steering at a steering lock stop |
REFER to steering system NVH concerns column A | REFER to steering system NVH concerns column B | REFER to steering system NVH concerns column C | REFER to steering system NVH concerns column D | REFER to steering system NVH concerns column E | REFER to steering system NVH concerns column F |
Steering system NVH concerns
Step 3: According to each identified operating condition (Column A, B, C, D, E, F), check each possible Steering System NVH concern with the detail symptom charts below.
Before conducting a vehicle test to identify a NVH concern carry out the following checks.
1. Check the tire pressures and adjust to specification, as necessary.
2. Make sure the steering system fluid is correct, the system is free of leaks and is operating correctly.
3. Make sure the vehicle steering system temperature is the same as described at the customer interview.
4. All evaluations must take place in a relatively quiet location.
5. The heating - air conditioning (A/C) fan and radio must be turned off during evaluations and the windows closed.