The water ingress in the cabin from the outside can have a variety of possible root causes.
This procedure is designed to find the root cause in the most efficient way.
Check the following items, before performing the troubleshooting procedure:
Wet spots on the upholstery panels or floor mats are an indication of water leakage or condensation.
To investigate the root cause, it is important to interview the driver for more details.
Ask the driver:
Where did you discover the first water trace in the cabin or the first wet interior panel?
What are the driving conditions when the water trace occurred?
What are the weather conditions when the water trace occurred?
How many people occupied the cabin?
Have any coffee machines, auxiliary heaters and/or other additional accessories been used in the cabin?
Are there water traces or wet interior panels before or after installing accessories on the cabin?
Condensation is simply the water vapour caused by everyday living. Water is absorbed into the warm atmosphere of the cabin.
When the cabin cools down the water vapour condenses on cool surfaces, such as windows and roof panels.
Condensation is generally easy to spot when it forms on non-absorbent surfaces, for example windows or the roof hatch. Condensation can form on any surface and can be hard to noticed until peeling or damage occurs to the interior panels.
Investigate whether there are any aftermarket accessories mounted on the cabin, such as:
Step 1 – Check ‘windscreen
Visual inspection of the windscreen
Is water entering the cabin via the windscreen?
Yes,Repair leakage according to the job (Replace Wndscreen).Finish
No,Go to 2A
2A – Check ‘the auxiliary roof driving and marker lights
Visual inspection the auxiliary roof driving and marker lights
1.Check for bubbles in the area of the auxiliary roof driving and marker lights (Check leakage roof)
Are there bubbles in the area of the auxiliary roof driving and marker lights?
YES,Repair leakage according to the job (repair leakage auxiliary roof driving and marker lights).And go to Step3
No,go to 2B
2B – Check ‘roof
Repair leakage according to the job (repair leakage auxiliary roof driving and marker lights).Go to step3
Check for bubbles in the area of the front roof edge (Check leakage roof).
Are there bubbles in the area of the front roof edge?
YES,Repair leakage according to the job (Repair leakage roof (Top-sleeper,top assy).
Go to step 3
Step 3- Validate ‘repair
Check whether the repair is successful.