ID.4 2021 ➤, ID.3 2020 ➤
Electric rear-wheel drive EIP220 and all-wheel drive EIA200, EIP220 - Edition 11.2021
corresponds to the ambient temperature, no pressure loss is
permissible.
Important
•
If leaks were found and dealt with, leak test must be repea‐
ted.
Checking pressure relief valve in filler cap
Note
The shape of the filler cap for the coolant expansion tank may
vary depending on vehicle equipment/version.
– Screw filler cap -3- onto adapter for cooling system tester
-V.A.G 1274/9- -2-.
– Connect cooling system tester -V.A.G 1274B- -1- to adapter
for cooling system tester -2-.
– Operate hand pump of cooling system tester -1- several
times.
Important
•
Blue filler cap: The pressure relief valve should open at a
pressure of 1.4 ... 1.6 bar.
•
Black filler cap: The pressure relief valve should open at a
pressure of 1.6 ... 1.8 bar.
– Renew filler cap -3- if pressure relief valve does not open as
described.
2.8
Draining coolant
Special tools and workshop equipment required
♦ adapter -VAS 691 005/5-
♦ compressed air adapter -VAS 542 007/5-
♦ drip tray -VAS 6208-
66
Rep. gr.19 - Cooling
ID.4 2021 ➤, ID.3 2020 ➤
Electric rear-wheel drive EIP220 and all-wheel drive EIA200, EIP220 - Edition 11.2021
NOTICE
Risk of damage to high-voltage components due to overheat‐
ing.
– Do not perform high-voltage charging if coolant has been
drained.
– Indicate this on the vehicle accordingly.
CAUTION
The cooling system may be under pressure. Risk of scalding
due to hot steam and hot coolant
Danger of scalding skin and other parts of the body
– Put on protective gloves.
– Put on safety goggles.
– Cover filler cap on expansion tank with a suitable cloth and
open carefully to release pressure.
– Open filler cap -arrow- on coolant expansion tank.
– Remove centre underbody trim (rear) ⇒ General body re‐
pairs, exterior; Rep. gr. 66; Underbody trim; Removing and
installing centre underbody trim (rear).
– Open hose clip -arrow- on power and control electronics for
electric drive -JX1- and unplug coolant hose -1-.
– Allow coolant to drain off into drip tray -VAS 6208-.
– Screw adapter -VAS 691 005/5- -2- onto coolant expansion
tank -1-.
2. Cooling system/coolant
67
ID.4 2021 ➤, ID.3 2020 ➤
Electric rear-wheel drive EIP220 and all-wheel drive EIA200, EIP220 - Edition 11.2021
– Fit compressed air adapter -VAS 542 007/5- onto adapter
-2-.
Note
Pressure regulator in compressed air adapter -VAS 542 007/5-
is set to 1 bar permanently.
Important
•
A second mechanic is required for the following steps.
– Hold coolant hose -1- in drip tray.
– Connect compressed air to compressed air adapter -VAS
542 007/5-.
– Blow through coolant expansion tank with compressed air
until no more coolant comes out.
2.9
Filling cooling system
Special tools and workshop equipment required
♦ adapter -VAS 691 005/5-
♦ cooling system charge device -VAS 6096-
♦ cooling system charging device -VAS 6968-
♦ cooling system tester -V.A.G 1274 B-
♦ electric vacuum pump -VAS 6096/2-
♦ hose clamps, up to 25 mm -3094-
Preparative measures
– Connect/fit all coolant hoses.
– Screw adapter -VAS 691 005/5- -2- onto coolant expansion
tank -1-.
68
Rep. gr.19 - Cooling
2024 VW ID.4 Owner's Manual
