Volkswagen ID.4: Coolant circuit, all-wheel drive

• Assembly overview - high-voltage heater (PTC)
• Removing and installing PTC heater element 3 [Z132]

Assembly overview - high-voltage heater (PTC)

1. PTC heater element 3 - Z132-

• ⇒ Rep. gr. 87 ; Removing and installing PTC heater element 3 [Z132]

2. Retainer
3. Bolt

• Qty. 3
• 10 Nm

4. Bolt

• Qty. 3
• 20 Nm

5. Nut

• 8 Nm

6. Electrical connector
7. Electrical connector

• High-voltage cable

8. Bolt

• Qty. 3
• 10 Nm

9. Retainer
10. Warning stickers

•  ⇒ Motor; Rep.

  gr. 93 ; Warning stickers; Checking warning stickers

Removing and installing PTC heater element 3 [Z132]

Special tools and workshop equipment required

• hose clamps, up to 25 mm in dia. - 3094-

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 .
• Remove air intake box of heater and air conditioning unit ⇒ Rep. gr. 87 ; Removing and installing air intake unit of heater and air conditioning unit .
• Clamp off coolant hoses -2- using hose clamps, up to 25 mm in dia. - 3094- .
• Detach clamps -3-, and pull off coolant hoses -2-.

• Unscrew nut -2-.
• Remove potential equalisation line -3-.
• Unclip retainers -5-.
• Disconnect electrical connectors -1- and -4-.

• Detach electrical connector -2- from bracket -1-.
• Detach retaining clip -3- of coolant hose -5- from bracket.
• Unscrew bolts -4-.
• Detach heater element (PTC) 3 - Z132- -1-.

Installing

Install in reverse order of removal, observing the following:

Important

• Contact surfaces must be clean.

• Clean soiled contact point of potential equalisation line ⇒ Electrical system; Rep. gr. 97 ; Cleaning contact surfaces .
•  Connect potential equalisation line -3-, and tighten nut -2-.
• Connect electrical connectors -1- and -4-.

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

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-energising high-voltage system .

Tightening torques

• ⇒ Rep. gr. 87 ; Assembly overview - high-voltage heater (PTC)

Coolant circuit, rear-wheel driveOperating and display unit