Volkswagen ID.3: Electric drive. Charging unit for high-voltage battery, with integrated voltage converter

• Assembly overview - charging unit for high-voltage battery
• Removing and installing charging unit 1 for high-voltage battery AX4

Assembly overview - charging unit for high-voltage battery

Assembly overview - charging unit for high-voltage battery

1 - High-voltage electrical connector

2 - Charging unit 1 for high-voltage battery -AX4-

❏ With voltage converter -A19-

❏ With control unit for high-voltage battery charger -J1050-

❏ → Rep. gr.93; Removing and installing charging unit 1 for high-voltage battery AX4

3 - Bolt

❏ 14 Nm

4 - Earth wire

❏ With potential equalisation line

5 - Nut

❏ 20 Nm

6 - Electrical connector for electrical system

7 - 12-V voltage supply

❏ Positive terminal

8 - Coolant connections with pressure differential sender for coolant -G1213-

9 - Bolt

10 - Bracket for charging unit 1 for high-voltage battery -AX4-

11 - Bolt

❏ Qty. 8

❏ 20 Nm

12 - Electrical connector

13 - Coolant hose

14 - High-voltage electrical connector

15 - Bolt

❏ 8 Nm

Removing and installing charging unit 1 for high-voltage battery AX4

Removing and installing charging unit 1 for high-voltage battery AX4

Special tools and workshop equipment required

♦ drip tray -VAS 6208-

♦ engine bung set -VAS 6122-

♦ hose clamps up to 25mm -3094-

The charging unit 1 for high-voltage battery -AX4- will henceforth be referred to as “charging unit”.

Pressure differential sender for coolant -G1213- will be referred to hereafter as “pressure differential sender”.

Removing

DANGER

High voltage can cause fatal injury.

Danger of severe or fatal injuries from electric shock or electric arcs.

– Have a high-voltage technician (HVT) or a high-voltage expert (HVE) de-energise the high-voltage system.

– → Rep. gr.93; De-energise high-voltage system.

If the charging unit is renewed, perform the test plan for renewal of the control unit:

– Carry out function “Renew control unit” using → Vehicle diagnostic tester → Rep. gr.00; Access to diagnoses.

Continued

– Disconnect battery → Electrical system; Rep. gr.27; Battery; Disconnecting and connecting battery.

– Remove rear underbody cladding → General body repairs, exterior; Rep. gr.66; Underbody cladding; Removing and installing rear underbody cladding.

– Remove rear centre underbody cladding → General body repairs, exterior; Rep. gr.66; Underbody cladding; Removing and installing rear centre underbody cladding.

– Remove skid plate → General body repairs, exterior; Rep. gr.66; Underbody cladding; Removing and installing skid plate.

– Place drip tray -VAS 6208- under rear section of vehicle.

– Clamp off coolant hoses -1- using hose clamps up to 25mm -3094- -A-.

– Disconnect electrical connector -1-.

– Open retaining clip -2- and -3-, and pull coolant hoses off charging unit.

– Disconnect electrical connector -1- and -3- from charging unit -2-.

– Disconnect electrical connector -2- and -3- from charging unit -1-.

– Unscrew bolt -4-.

– Unscrew nut -2-.

– Unscrew bolts -1-.

– Remove charging unit -2- with bracket downwards.

– Place charging unit -2- on a clean surface.

– Protect connector receiver and coolant connections to prevent the ingress of dirt.

– Unscrew bolts -3-.

– Remove bracket -2- from charging unit -1-.

Store removed charging unit with pressure differential sender for coolant -G1213-

Time before installation and filling of cooling system is longer than 6 hours.

Continued

NOTICE

Deposits from dried coolant in the measuring chambers of the pressure differential sender.

The pressure differential sender is no longer functional.

– The measuring chamber in the pressure differential sender must be filled with coolant and sealed.

– Pull out retaining clip -3-.

– Open clamp -1-.

– Pull off pressure differential sender -2-.

– Fill pressure differential sender -1- with coolant at openings -arrows-.

Important

● Make sure that no coolant can escape during storage.

– Seal openings on pressure differential sender -1- with clean sealing plugs -A- from engine bung set -VAS 6122-.

All vehicles (continued)

Installing

Install in reverse order of removal, observing the following:

– → Rep. gr.19; Cooling system/coolant; Filling cooling system.

If the charging unit has been renewed, perform the test plan for renewal of the control unit:

– Carry out function “Renew control unit” using → Vehicle diagnostic tester → Rep. gr.00; Access to diagnoses.

Continued

WARNING

High voltage can cause fatal injury.

Danger of severe or fatal injuries from electric shock or electric arcs.

– Have a high-voltage technician (HVT) or a high-voltage expert (HVE) re-energise the high-voltage system.

– → Rep. gr.93; Re-energise high-voltage system.

Tightening torques

♦ → Rep. gr.93; Assembly overview - charging unit for high-voltage battery

Electric drive. Charging unit for high-voltage batteryElectric drive. Vehicle noise & engine sound