Table of Contents > Electric drive systems > High-voltage battery unit > Voltage and insulation measurement

VW ID.4 Electric rear-wheel and all-wheel drive ➜ Voltage and insulation measurement

ID.4 2021 ➤, ID.3 2020 ➤  
Electric rear-wheel drive EIP220 and all-wheel drive EIA200, EIP220 - Edition 11.2021  
– Apply sealant -3-⇒ Electronic parts catalogue (ETKA) to up‐  
per part of battery housing -1- all around and parallel to  
gasket -2-.  
– Fit upper part of battery housing evenly on lower part of  
battery housing.  
Tightening torques  
Install in reverse order of removal, observing the following:  
♦ ⇒ Rep. gr. 93; Leakage test of high-voltage battery 1 [AX2]  
♦ ⇒ Rep. gr. 93; Assembly overview – high-voltage battery,  
removed, 48, 55, 62 kWh  
♦ Seal bolts -1- through -26- with wax ⇒ Electronic parts cata‐  
logue (ETKA).  
4.13  
Voltage and insulation measurement  
Special tools and workshop equipment required  
♦ high-voltage test module -VAS 6558A-  
146  
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  
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  
All tests must be performed using high-voltage test module  
-VAS 6558A-/high-voltage test module -VAS 6558- and ⇒ Vehi‐  
cle diagnostic tester.  
Preparing for the measurements  
– ⇒ Rep. gr. 93; Opening high-voltage battery 1 [AX2].  
– Select measuring method.  
♦ High-voltage system – overall functions  
♦ High-voltage test module VAS 6558/VAS 6558A  
♦ Voltage measurement  
♦ Select type of measurement/function  
♦ Low impedance voltage measurement  
♦ Perform continuous measurement  
– Check function of high-voltage test module -VAS 6558A-/-  
VAS 6558- on suitable voltage source. (Battery -A-)  
Checking voltage of high-voltage battery 1 -AX2-  
– Check voltage between high-voltage “positive”-1- and high-  
voltage “negative” -2-.  
4. High-voltage battery unit  
147  
ID.4 2021 ➤, ID.3 2020 ➤  
Electric rear-wheel drive EIP220 and all-wheel drive EIA200, EIP220 - Edition 11.2021  
– Make a note of the voltage of high-voltage battery 1 -AX2-.  
Checking voltage between high-voltage “positive” and battery  
housing  
– Check voltage between high-voltage “positive”-1- and earth  
connection -3-.  
Note  
The voltage decreases during the measurement.  
Important  
Specification: max. 5 V  
Checking voltage between high-voltage “negative” and battery  
housing  
– Check voltage between high-voltage “negative”-2- and earth  
connection -3-.  
148  
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  
Note  
The voltage decreases during the measurement.  
Important  
Specification: max. 5 V  
4.14  
Opening electrical circuit, 48, 55 kWh  
4.14.1  
Opening electrical circuit  
Special tools and workshop equipment required  
♦ High-voltage tool set -VAS 6762-  
♦ Torque wrench -VAS 6883/1A-  
♦ accidental contact protection -T10608-  
♦ accidental contact protection insert -T10628-  
♦ voltage tester -VAS 6762/45-  
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  
4. High-voltage battery unit  
149  

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