ID.4 2021 ➤, ID.3 2020 ➤
Electric rear-wheel drive EIP220 and all-wheel drive EIA200, EIP220 - Edition 11.2021
1 - Coolant hose
2 - Retaining clip
3 - O-ring
4 - Retaining clip
5 - Hose clamp
6 - Thermostat
❑ Starts to open at 15 °C
7 - Coolant hose
8 - Hose clamp
9 - Coolant expansion tank
❑ With coolant shortage
indicator sender -G32-
❑ ⇒ Rep. gr. 19; Remov‐
ing and installing cool‐
ant expansion tank
10 - Coolant manifold
❑ Coolant hose and cool‐
ant pipe are marked
with numbers
❑ Note allocation
11 - Spreader rivet
12 - Three-phase current
drive 2 -VX97-
❑ With power and control
electronics 2 for electric
drive -JX4-
❑ ⇒ Rep. gr. 10; Assem‐
bly overview – front mo‐
tor
❑ ⇒ Rep. gr. 10; Remov‐
ing front motor
❑ ⇒ Rep. gr. 10; Installing front motor
❑ ⇒ Rep. gr. 93; Removing and installing power and control electronics for electric drive, rear-wheel
drive
B - Assembly overview – cooling system, rear
2. Cooling system/coolant
61
ID.4 2021 ➤, ID.3 2020 ➤
Electric rear-wheel drive EIP220 and all-wheel drive EIA200, EIP220 - Edition 11.2021
1 - Voltage converter -A19-
❑ ⇒ Rep. gr. 93; Re‐
moving and installing
voltage converter, rear-
wheel drive
2 - Charging unit 1 for high-
voltage battery -AX4-
❑ With control unit for
high-voltage battery
charger -J1050-
❑ ⇒ Rep. gr. 93; Remov‐
ing and installing charg‐
ing unit 1 for high-volt‐
age battery [AX4], rear-
wheel drive
3 - Power and control elec‐
tronics for electric drive -JX1-
❑ With three-phase cur‐
rent drive -VX54-
❑ ⇒ Rep. gr. 93; Remov‐
ing and installing power
and control electronics
for electric drive, rear-
wheel drive
4 - O-ring
5 - Retaining clip
6 - Coolant hose
7 - Retaining clip
8 - Hose clamp
9 - Coolant pipe
❑ Return line
10 - Coolant connection
❑ ⇒ Rep. gr. 10; Exploded view - motor (rear)
11 - Retaining clip
12 - Temperature sensor -G18-
❑ ⇒ Rep. gr. 19; Removing and installing temperature sensor [G18]
13 - O-ring
❑ Renew after removing
14 - Coolant hose
15 - Coolant pipe
❑ Supply line
16 - Coolant hose
C - Assembly overview – cooling system, front left
62
Rep. gr.19 - Cooling
ID.4 2021 ➤, ID.3 2020 ➤
Electric rear-wheel drive EIP220 and all-wheel drive EIA200, EIP220 - Edition 11.2021
1 - Hose clamp
2 - Coolant pump for high-
voltage battery -V590-
❑ ⇒ Rep. gr. 19; Assem‐
bly overview - electric
coolant pump
❑ ⇒ Rep. gr. 19; Remov‐
ing and installing cool‐
ant pump for high-volt‐
age battery [V590]
3 - Coolant temperature send‐
er 2 for high-voltage battery
-G899-
❑ ⇒ Rep. gr. 19; Explo‐
ded view - coolant tem‐
perature senders
❑ ⇒ Rep. gr. 19; Remov‐
ing and installing cool‐
ant temperature sender
2 for high-voltage bat‐
tery G899
4 - Retaining clip
5 - O-ring
6 - Bolt
❑ Qty. 2
❑ 8 Nm
7 - Retaining clip
8 - Coolant hose
❑ Marking -R- = return
9 - Mixing valve for high-
voltage battery pre-heating -
V683-
❑ ⇒ Rep. gr. 19; Assem‐
bly overview – coolant valves
❑ ⇒ Rep. gr. 19; Removing and installing mixing valve for high-voltage battery pre-heating [V683]
10 - Bolt
❑ Qty. 3
❑ 8 Nm
11 - Coolant pipe
❑ Return line
12 - Coolant temperature sender 1 for high-voltage battery -G898-
❑ ⇒ Rep. gr. 19; Exploded view - coolant temperature senders
❑ ⇒ Rep. gr. 19; Removing and installing coolant temperature sender 1 for high-voltage battery G898
13 - Coolant pipe
❑ Supply line
14 - Coolant hose
15 - Coolant hose
❑ Marking -V- = supply
16 - Bolt
❑ Qty. 2
❑ 8 Nm
2. Cooling system/coolant
63
ID.4 2021 ➤, ID.3 2020 ➤
Electric rear-wheel drive EIP220 and all-wheel drive EIA200, EIP220 - Edition 11.2021
17 - Coolant pump for low-temperature circuit -V468-
❑ ⇒ Rep. gr. 19; Assembly overview - electric coolant pump
❑ ⇒ Rep. gr. 19; Removing and installing coolant pump for low-temperature circuit [V468]
18 - Coolant pipe
19 - Heater element (PTC) 3 -Z132-
❑ ⇒ Heating, air conditioning; Rep. gr. 87; Coolant circuit; Removing and installing PTC heater element 3
[Z132]
20 - Coolant hose
21 - Coolant hose
22 - Coolant hose
23 - Bracket for mixing valve
24 - Mixing valve 2 for high-voltage battery pre-heating -V696-
❑ Depending on equipment/version
❑ ⇒ Rep. gr. 19; Assembly overview – coolant valves
❑ ⇒ Rep. gr. 19; Removing and installing mixing valve 2 for high-voltage battery [V696] pre-heating, heat
pump
25 - Retaining clip
26 - Coolant hose
27 - Three-phase current drive 2 -VX97-
❑ With power and control electronics 2 for electric drive -JX4-
❑ ⇒ Rep. gr. 10; Assembly overview – front motor
❑ ⇒ Rep. gr. 10; Removing front motor
❑ ⇒ Rep. gr. 10; Installing front motor
❑ ⇒ Rep. gr. 93; Removing and installing power and control electronics for electric drive, rear-wheel
drive
2.7
Checking cooling system for leaks
Special tools and workshop equipment required
♦ adapter - VAS 691 005/5-
♦ adapter for cooling system tester -V.A.G 1274/9-
♦ cooling system tester -V.A.G 1274B-
64 .
– Check cooling system for leaks ⇒ page 65 .
– Check pressure relief valve in filler cap ⇒ page 66 .
Checking cooling system tester - V.A.G 1274B- for leaks
Important
•
To ensure that the leak test is carried out correctly, a self-
test must first be performed on the cooling system tester
-V.A.G 1274B-.
– Operate hand pump of cooling system tester several times
and build up a pressure of 3.0 bar.
– Observe pressure on pressure gauge of cooling system test‐
er for 30 seconds.
64
Rep. gr.19 - Cooling
ID.4 2021 ➤, ID.3 2020 ➤
Electric rear-wheel drive EIP220 and all-wheel drive EIA200, EIP220 - Edition 11.2021
If no pressure is built up or if pressure dissipates, cooling sys‐
tem tester must not be used.
Checking cooling system for leaks
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.
– Screw adapter - VAS 691 005/5- -1- onto coolant expansion
tank -2-.
– Connect cooling system tester -V.A.G 1274B- -3- to adapter
-1-.
– Operate hand pump of cooling system tester several times
and build up a pressure of 1.5 bar.
Important
•
The pressure should not drop by more than 0.2 bar within 10
minutes.
– If the pressure drops more than 0.2 bar, locate leak and
eliminate fault.
Note
The pressure loss of 0.2 bar within 10 minutes is caused by
the decrease in coolant temperature. If the coolant temperature
2. Cooling system/coolant
65
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
2024 VW ID.4 Owner's Manual
