BMW X5: Air Conditioner Test (R 134A)
Before A/C efficiency test, satisfy following conditions:
1. Provide a MoDiC or DIS. Safeguard electrical system integrity by checking the fault memory (no faults in the fault memory).
2. Provide a thermometer with separate gauge.
3. Perform the test in a suitable work bay with an ambient temperature between 20 ºC and 30 ºC.
Re 1:
Connect MoDiC or DIS to car and display evaporator temperature.
Re 2:
Position a thermometer with a separate gauge approx. 5 cm below the roof liner at the height of the B-pillar.
Lay gauge outwards out of vehicle interior.
Re 3:
Heating up vehicle interior:
- A/C button is not activated during heating up.
- Close all windows and doors.
- Set recirculated air mode.
- Select air distribution mode for footwell and defrosting.
- Maximum temperature setting.
- Maximum fan stage.
- Run engine at approx. 2000 RPM until operating temperature is reached, then idle speed.
A/C efficiency test:
Turn on A/C compressor at a vehicle interior temperature of 50 ºC.
After 3-4 minutes, the evaporator sensor temperature must be > or = 15 ºC.
Draw off A/C system if this temperature is not reached. Measure amount of refrigerant drawn off.
If drawn-off quantity does not correspond to specified fill quantity : supplement refrigerant and repeat test.
If fill quantity is correct, continue troubleshooting by pressure measurement.
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Instructions For Handling Refrigerant R 134A
WARNING: Although R 134a at normal temperature is non-toxic,
non-flammable and
not explosive in air in any mixture ratio, it is still essential to follow
various safety precautions.
The filled refrig
Leak Testing With Ultraviolet Additives (UV Additives) (BMW
Leak-Testing Case)
IMPORTANT: It is absolutely essential to read and comply with the
equipment manufacturer's
instructions for use provided in the equipment case!
Read and comply with the instructions for use provided
Drawing Off, Evacuating And Filling A/C System (R 134A)
WARNING: Refrigerant circuit is under high pressure!
Repair work may only be carried out on a DEPRESSURIZED refrigerant
circuit!
Avoid contact with refrigerant and refrigerant oil.
Follow safety inst
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Enlarging the cargo area
Principle
The cargo area can be enlarged by folding down
the rear seat backrests.
General information
The rear seat backrest of the second seat row is
divided at a ratio of 40-20-40. The side rear seat
backrests and the center section can be folded
down separately.
The rear seat backrests can be fo
Removing And Installing Mechanism For Front Glass Lid
Necessary preliminary tasks:
Remove glass slide/tilt sunroof.
Remove glass slide/tilt sunroof lid at front.
Remove glass slide/tilt sunroof lid at rear.
Remove front drip molding.
Remove drive for slide/tilt sunroof actuation.
Overview of glass lid mechanism:
Fig. 4: Identifying Glass Lid
