Volkswagen ID.4: Voltage converter

• Assembly overview - voltage converter, rear-wheel drive
• Assembly overview - voltage converter, all-wheel drive
• Removing and installing voltage converter, rear-wheel drive
• Removing and installing voltage converter, all-wheel drive

Assembly overview - voltage converter, rear-wheel drive

Assembly overview - voltage converter

1. Voltage converter - A19-

• ⇒ Rep. gr. 93 ; Removing and installing voltage converter [A19]

2.  Bolt

• Tightening sequence: "diagonal sequence"
• Qty. 4
• M6×25
• 8 Nm

3. Coolant connections
4. High-voltage electrical connectors
5. 12 V voltage supply

• Positive terminal
• 20 Nm

6. 12 V voltage supply

• Negative terminal
• 20 Nm

Assembly overview - voltage converter, all-wheel drive

Assembly overview - voltage converter

1. Coolant connection
2. Electrical connector for electrical system
3. 12 V voltage supply

• Positive terminal
• 8 Nm

4. High-voltage electrical connector
5. Coolant connection
6. 12 V voltage supply

• Negative terminal
• 20 Nm

7. Nut

• Qty. 4
• 8 Nm

8. Voltage converter - A19-

• ⇒ Rep. gr. 93 ; Removing and installing voltage converter [A19]

Removing and installing voltage converter, rear-wheel drive

Removing and installing voltage converter

Special tools and workshop equipment required

• drip tray for workshop hoist - VAS 6208-
• hose clamps, up to Ø 25mm - 3094-

Voltage converter - A19- is referred to hereafter as voltage converter.

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 voltage converter is to be 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

•  Remove air intake unit of heater and air conditioning unit ⇒ Heating, air conditioning; Rep. gr. 87 ; Front heater and air conditioning unit; Removing and installing air intake box of heater and air conditioning unit .
• Disconnect battery ⇒ Electrical system; Rep. gr. 27 ; Battery; Disconnecting and connecting battery .
• Place drip tray for workshop hoist - VAS 6208- under front of vehicle.
• Clamp off coolant hoses using hose clamps, up to Ø 25mm - 3094- .
• Detach clamps -2-, and pull off coolant hoses.

• Disconnect high-voltage electrical connector -3- from voltage converter.
• Fold up positive cable cap -5-.
• Unscrew bolts -4-.
• Unscrew bolts -arrows-.

Installing

Install in reverse order of removal, observing the following:

• ⇒ Rep. gr. 19 ; Cooling system/coolant; Filling cooling system

If the voltage converter 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 - voltage converter

Removing and installing voltage converter, all-wheel drive

Removing and installing voltage converter

The voltage converter - A19- will henceforth be referred to as "voltage converter".

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

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 voltage converter is to be 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 charging unit ⇒ Rep. gr. 93 ; Removing and installing charging unit 1 for high-voltage battery [AX4] .
• Unscrew bolts -1-.
• Detach voltage converter with bracket -2- from charging unit.

• Unscrew bolt -3-.
• Unscrew nuts -4-.
• Detach bracket -5- from voltage converter -1-.

Installing

Install in reverse order of removal, observing the following:

If the voltage converter 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 - voltage converter