Table of Contents > Electric drive systems > High-voltage battery unit > Visual inspection of high-voltage battery 1 [AX2]

VW ID.4 Electric rear-wheel and all-wheel drive ➜ Visual inspection of high-voltage battery 1 [AX2]

ID.4 2021 ➤, ID.3 2020 ➤  
Electric rear-wheel drive EIP220 and all-wheel drive EIA200, EIP220 - Edition 11.2021  
Stage Bolts  
Tightening torque/angle specification  
1.  
2.  
-1- to -24- 50 Nm +90°  
-25- to -28- 40 Nm +180°  
4.3  
Visual inspection of high-voltage bat‐  
tery 1 [AX2]  
CAUTION  
The high-voltage battery can become extremely hot. This can  
cause injuries.  
Take care not to burn your hands.  
– Put on protective gloves.  
Note  
Inform the high-voltage expert if any problems arise or entries in  
the event memory appear.  
Inspect the high-voltage battery 1 -AX2- for the following:  
– Cracks in upper or lower parts of battery housing  
– Deformation of upper or lower parts of battery housing  
– Colour changes due to temperature impact and tarnishing of  
battery housing  
– Escaping electrolyte  
– Damage to high-voltage contacts  
– Legible and available information and warning stickers  
– Fitted potential equalisation line  
– Corrosion damage  
– ⇒ Rep. gr. 93; Diagnosis of high-voltage battery 1 [AX2].  
4.4  
Diagnosis of high-voltage battery 1  
[AX2]  
Important  
The high-voltage battery 1 remains installed in the vehicle  
during the diagnosis.  
– Carry out diagnosis of high-voltage battery using ⇒ Vehicle  
diagnostic tester⇒ Rep. gr. 00; Access to diagnoses.  
4.5  
Searching for leaks from high-voltage  
battery  
Note  
Only search for leaks from high-voltage battery 1 -AX2- if the  
leakage test failed.  
Note  
Leaks are indicated by bubbles.  
– Build up pressure. ⇒ Rep. gr. 93; Leakage test of high-volt‐  
age battery 1 [AX2].  
4. High-voltage battery unit  
119  

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