Electrical Circuit Inspection Procedure: Notes

WARNING: This page is about a different car, the 2019 Kia Soul EV. However, it is still accessible from the selected car via links, so may be relevant.

Check Open Circuit

Procedures for Open Circuit

Continuity Check
Voltage Check

If an open circuit occurs (as seen in [FIG. 1]), it can be found by performing Step 2 (Continuity Check Method) or Step 3 (Voltage Check Method) as shown below.

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Continuity Check Method

NOTE: When measuring the resistance, lightly shake the wire harness up and down or left to right.

Specification (Resistance)

1Ω or less → Normal Circuit

1MΩ or Higher → Open Circuit

Disconnect connectors (A), (C) and measure resistance between connectors (A) and (C) as shown in [FIG. 2].

In [FIG.2.] the measured resistance of lines 1 and 2 is higher than 1 MΩ and below 1 Ω respectively. Specifically, the open circuit is line 1 (Line 2 is normal). To find the exact break point, check sub line of line 1 as described in the following step.

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Disconnect connector (B), and measure the resistance between connectors (C) and (B1) and between (B2) and (A) as shown in [FIG. 3].

In this case the measured resistance between connectors (C) and (B1) is higher than 1MΩ and the open circuit is located between terminal 1 of connector (C) and terminal 1 of connector (B1).

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Voltage Check Method

With each connector still connected, measure the voltage between the chassis ground and terminal 1 of each connectors (A), (B) and (C) as shown in [FIG. 4].

The measured voltages of each connector are 5V, 5V and 0V respectively. So the open circuit is located between connectors (C) and (B).

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