Audi Q5: General Information
Vehicles with a High Voltage System (Hybrid Vehicles)
Extremely Dangerous Due to High-Voltage
The high-voltage system is under high-voltage. Death or serious
bodily injury by electric shock.
- Individuals with electronic/medical life- and health sustaining
machines in or on their person cannot perform any work on high-voltage
systems. Life- and health sustaining machines are for example pain
killer pumps, implanted defibrillators, pacemakers, insulin pumps, and
hearing aids.
- Have the high-voltage system de-energized by a qualified person.
There is a Risk of Injury from the Engine Starting Unexpectedly
On electric - hybrid vehicles an active ready mode is difficult to
identify. Parts of the body can be clamped or pulled.
- Turn off the ignition.
- Place the ignition key outside of the vehicle interior.
Risk of Damaging the High-Voltage Cables
Misuse can damage the insulation of high-voltage cables or
high-voltage connectors.
- Never support objects on the high-voltage cables and the
high-voltage connectors.
- Never support tools on the high-voltage cables and the high-voltage
connectors.
- Never sharply bend or kink the high-voltage cables.
- When connecting pay attention to the coding of the high-voltage
connectors.
- For all procedures on vehicles with high-voltage system pay
attention to the additional warning message for these vehicles.
Refer to
→ Chapter "Warnings when Working on Vehicles with High Voltage
System".
- If procedures are necessary near components of the
high-voltage system "perform a visual inspection of the damage
of the high-voltage components and lines". Refer to
→ Chapter "Performing a Visual Inspection of Damage to High
Voltage Components and Cables".
- If work on the components of the high-voltage system is
necessity, de-energize the high-voltage system. Refer to
→ Rep. Gr.93; High-Voltage System, De-Energizing or
→ Electrical Equipment; Rep. Gr.93; High-Voltage System,
De-Energizing.
- Charge the vehicle battery, for example, using the Battery
Charger -VAS5904- in the battery support mode to minimize the
number of automatic starts during the test- and measuring
procedures while the ready mode is active. Refer to
→ Electrical Equipment General Information; Rep. Gr.27; Battery;
Battery, Charging and
→ High Voltage Vehicle General Information; Rep.
Gr.93; High-Voltage System General Warnings.
- For testing and measurement procedures that require the
ready mode to be active or the ignition to be switched on, the
selector lever must be in the "P" position and the parking brake
must be activated. The required tools must be placed so that
they do not come into contact with any rotating components in
the engine and they must also not go into the vicinity of the
rotating components when the engine is running.
Note
- Also move the selector lever into position "P" and activate
the parking brake for testing and measuring procedures which
require the ignition to be on, but do not require the ready mode
to be active.
- The ready mode is displayed in the Instrument Cluster
Control Module -J285- above the "power meter". Refer to Owner's
Manual
- For activating and deactivating the ready mode, refer to the
Owner's Manual (while doing so, note the display in the
Instrument Cluster Control Module -J285-).
Vehicles with Start/Stop System
There is a Risk of Injury from the Engine Starting Unexpectedly
The engine can start unexpectedly on vehicles with an activated
Start/Stop System. A message appears in the instrument cluster
indicating whether the Start/Stop System is activated.
- Deactivate the Start/Stop System: Turn off the ignition.
All Vehicles
WARNING
There is a risk of freezing.
Refrigerant may leak out if refrigerant circuit is
not discharged.
Refrigerant must be extracted before opening the
refrigerant circuit. If refrigerant circuit is not
opened within 10 minutes of extraction, pressure may
form in refrigerant circuit due to evaporation. Extract
the refrigerant again.
- All components of the refrigerant circuit submitted for
quality observation are always to be sealed (use original
sealing caps of replacement part).
- To date, the following replacement parts (A/C compressor,
reservoir, receiver/dryer, evaporator and condenser) have been
filled with nitrogen gas. This charging stops gradually or the
charging pressure is so low that gas does not escape noticeably
when opening.
- On vehicles installed with a compressor with no A/C clutch,
the engine is only to be started following complete assembly of
the refrigerant circuit (compressor always in operation as well)
.
- When the refrigerant circuit is empty, the A/C compressor
with A/C Compressor Regulator Valve -N280-(without A/C clutch)
is switched to internal lubrication with the result that only a
minimal amount of oil is pumped from the compressor into the
circuit.
Note
- As parts are sometimes stored for lengthy periods and at
different locations within the spare parts organization, it is
entirely possible that gas will escape from some parts and not
from others on initial opening (even in the case of identical
spare part numbers). Sealing caps at replacement part
connections are therefore to be removed carefully and the
nitrogen gas allowed to escape slowly.
- The refrigerant circuit is equipped either with a restrictor
and a reservoir, or with an expansion valve and receiver/dryer.
- The dryer cartridge or components with dryer bag (reservoir,
receiver/dryer) are always to be replaced after cleaning the
refrigerant circuit by flushing with refrigerant R134a. Refer to
→ Chapter "Refrigerant Circuit, Cleaning (Flushing), with
Refrigerant R134a". Or blow through using compressed
air and nitrogen. Refer to
→ Chapter "Refrigerant Circuit, Flushing with Compressed Air and
Nitrogen". In doing so, leave sealed as long as
possible to minimize absorption of moisture.
- The dryer cartridge or components with dryer bag (reservoir,
receiver/dryer) are to be replaced if it is required for certain
repair manual operations or if the refrigerant circuit has been
open for a lengthy period and moisture has penetrated (for
example, following an accident). Refer to
→ Chapter "Leaking or Damaged Components except A/C Compressor,
Reservoir or Receiver/Dryer".
- The period of time which a refrigerant circuit may be left
open without having to replace a component with the dryer bag
(reservoir, receiver/dryer) depends on ambient influences to a
large extent. Given a high ambient temperature and a high
humidity level or if the vehicle, for example, has been standing
in the open or driven (in wet, foggy weather conditions), the
period will be considerably shorter than for a vehicle which has
been standing in a heated dry area. The size of the opening
through which moisture may ingress into the circuit also
influences the period for which a refrigerant circuit can be
left open without having to replace the component with the dryer
bag. Refer to
→ Chapter "Leaking or Damaged Components except A/C Compressor,
Reservoir or Receiver/Dryer".
- Seal open connections and pipes (to prevent absorption of
moisture).
- Always replace the restrictor.
Caution
Dispose of dirty or used oils of unknown origin
paying attention to local regulations.
READ NEXT:
The refrigerant circuit was completely empty (for example
with larger leak or cracked hose)
Note
In the event of only a minor leak with slow escape of
refrigerant (e.g. at a small leakage
Note
Cleaning the refrigerant circuit means flushing with
refrigerant R134a. Refer to
→ Chapter "Refrigerant Circuit, Cleaning (Flushing), with
Refrigerant R134a".
If a faulty A/C
Vehicles with a High Voltage System (Hybrid Vehicles)
Extremely Dangerous Due to High-Voltage
The high-voltage system is under high-voltage. Death or serious
bodily injury by electric shock.
- I
SEE MORE:
Caution
After each repair to the front passenger seat where
the seat or backrest cover was
"removed", a basic setting of the passenger
occupant detection system control module must be
performed. Refer to Vehicle Diagnostic Tester.
Do not bend the passenger occupant detection system
The condenser conducts heat from compressed refrigerant gas
to the ambient air.
This condenses the refrigerant gas to fluid.
Note
Depending on the version of the refrigerant circuit, the
receiver/dryer is installed (integrated) either on the condenser
or inside the condenser. Refer to