The resistance/insulation resistance measurement should only be performed after the vehicle has been de-energized.
Otherwise, the test results may be falsified.
The resistance/insulation resistance measurement on the high-voltage component must never be performed between HV+ (positive) and HV- (negative).
The high-voltage component can otherwise be damaged.
A resistance/insulation resistance tester is used for the measurement. The resistance/insulation resistance tester must be checked for proper operation before commencing test work in accordance with the manufacturer's specifications.
Carefully connect the probes of the resistance/insulation resistance tester to the high-voltage connections.
Otherwise the high-voltage connections may be damaged.
1 | Perform visual inspection to determine whether high-voltage battery charger equipotential bonding line (1) is connected to ground point (3) and the high-voltage battery charger attachment point. |
2 | Perform visual inspection to determine whether high-voltage battery charger equipotential bonding line (2) is connected to ground point (3) and to the high-voltage battery charger attachment point. |
3 | Check if high voltage battery equipotential bonding line (1) at the ground point (3) and high voltage battery attachment point is firmly seated. |
4 | Check if high voltage battery charger equipotential bonding line (2) at the ground point (3) and high voltage battery charger attachment point is firmly seated. |
P54.10-4618-11
SAE charger feed-in socket |
L1 | Phase L1 |
N | Neutral conductor |
PE | Protective earth conductor |
X58/23 | Charger feed-in socket |
P54.10-4215-11
5 | Calibrate resistance/insulation resistance tester. |
6 | Open socket flap under right rear taillamp. |
7 | Open cover of charger feed-in socket (X58/23). |
ECE charger feed-in socket |
L1 | Phase L1 |
N | Neutral conductor |
PE | Protective earth conductor |
X58/23 | Charger feed-in socket |
P54.10-4151-12
Conduct resistance/insulation resistance measurement of HV-AC circuit-1-phase (vehicle socket as measuring point) charger feed-in socket (X58/23) |
8 | Measure resistance using resistance/insulation resistance tester between protective earth conductor (PE) of charger feed-in socket (X58/23) and ground point (3) in the trunk. |
To do so, set the resistance/insulation resistance tester to the resistance testing mode. |
The test must be carried out if the ground fault circuit interrupter integrated in the charging cable or the ground fault circuit interrupter of the external power supply has been triggered. |
Specified value < 1 Ω (+0.9 Ω) |
9 | Measure insulation using resistance/insulation resistance tester between phase L1 (L1) of charger feed-in socket (X58/23) and the protective earth conductor (PE). |
To do so, set resistance/insulation resistance tester to 500 V. |
The test must be carried out if the ground fault circuit interrupter integrated in the charging cable or the ground fault circuit interrupter of the external power supply has been triggered. |
Specified value > 1 MΩ. |
10 | Measure insulation using resistance/insulation resistance tester between neutral conductor (N) of charger feed-in socket (X58/23) and the protective earth conductor (PE). |
The test must be carried out if the ground fault circuit interrupter integrated in the charging cable or the ground fault circuit interrupter of the external power supply has been triggered. |
Specified value > 1 MΩ. |