Table of Contents > Electric drive systems > High-voltage battery unit > Removing and installing battery regulation control unit [J840]

VW ID.4 Electric rear-wheel and all-wheel drive ➜ Removing and installing battery regulation control unit [J840]

ID.4 2021 ➤, ID.3 2020 ➤  
Electric rear-wheel drive EIP220 and all-wheel drive EIA200, EIP220 - Edition 11.2021  
minal -SX8- -1- and battery module 12 -J1002- -4- to speci‐  
fied torque.  
– Have an additional mechanic observe torque settings.  
– Remove accidental contact protection insert -T10628- -A-.  
– Further installation is carried out in reverse order of removal,  
observing the following:  
Tightening torques  
♦ ⇒ Rep. gr. 93; Assembly overview – high-voltage battery,  
battery modules  
4.17  
Removing and installing battery regula‐  
tion control unit [J840]  
Special tools and workshop equipment required  
♦ High-voltage tool set -VAS 6762-  
♦ Torque wrench -VAS 6883/1A-  
DANGER  
Danger to life from high voltage.  
Electric shocks or arcs may lead to serious injuries or death.  
– Suitable personal protective equipment (PPE) must be  
worn for the subsequent work steps.  
– The subsequent work steps must be supervised by an  
additional specialist with appropriate qualification.  
– Outside the hazard area, the additional authorised special‐  
ist can support the HVE as required within the scope of his  
or her qualification.  
Put on the required protective equipment for the subsequent  
work steps:  
♦ Arc flash resistant clothing (at least APC 2, at least 318 kJ)  
♦ Helmet with arc flash resistant visor (at least APC 2, at least  
318 kJ)  
♦ Arc flash resistant gloves with nitrile glove liners (at least  
APC 2, at least 318 kJ), insulating up to at least 500 V  
♦ Safety shoes with ESD protection  
Note  
The battery regulation control unit -J840- and switching unit  
for high-voltage battery, negative terminal -SX7- are calibrated  
together in the factory.  
Important  
The battery regulation control unit -J840- and switching unit  
for high-voltage battery, negative terminal -SX7- must be  
renewed together ⇒ Rep. gr. 93; Removing and installing  
switching unit for high-voltage battery, negative terminal  
[SX7], 48, 55, 65 kWh.  
Removing  
– ⇒ Rep. gr. 93; Opening high-voltage battery 1 [AX2].  
– ⇒ Rep. gr. 93; Opening electrical circuit, 48, 55 kWh.  
– Disconnect electrical connectors -3-, and place wiring har‐  
ness aside.  
158  
Rep. gr.93 - Electric drive systems  
ID.4 2021 ➤, ID.3 2020 ➤  
Electric rear-wheel drive EIP220 and all-wheel drive EIA200, EIP220 - Edition 11.2021  
– Unscrew bolts -2-.  
– Remove battery regulation control unit -J840- -1-.  
Installing  
Install in reverse order of removal, observing the following:  
Tightening torques  
♦ ⇒ Rep. gr. 93; Assembly overview – switching unit for high-  
voltage battery, 48, 55, 62 kWh  
4.18  
Charging and discharging battery mod‐  
ules  
Special tools and workshop equipment required  
♦ module balancer -VAS 6910-  
DANGER  
Danger to life from high voltage.  
Electric shocks or arcs may lead to serious injuries or death.  
– Suitable personal protective equipment (PPE) must be  
worn for the subsequent work steps.  
– The subsequent work steps must be supervised by an  
additional specialist with appropriate qualification.  
– Outside the hazard area, the additional authorised special‐  
ist can support the HVE as required within the scope of his  
or her qualification.  
Put on the required protective equipment for the subsequent  
work steps:  
♦ Arc flash resistant clothing (at least APC 2, at least 318 kJ)  
♦ Helmet with arc flash resistant visor (at least APC 2, at least  
318 kJ)  
♦ Arc flash resistant gloves with nitrile glove liners (at least  
APC 2, at least 318 kJ), insulating up to at least 500 V  
♦ Safety shoes with ESD protection  
– ⇒ Rep. gr. 93; Opening high-voltage battery 1 [AX2].  
– ⇒ Rep. gr. 93; Opening electrical circuit, 48, 55 kWh.  
Important  
If a new battery module is installed, it is essential to adapt  
the charge level using the module balancer -VAS 6910-.  
4. High-voltage battery unit  
159  

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