Check Open Circuit

• Continuity Check
• Voltage Check

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

Courtesy of KIA MOTORS AMERICA, INC.

Specification (Resistance) 

1Ω or less → Normal Circuit

1MΩ or Higher → Open Circuit

1. Disconnect connectors (A), (C) and measure resistance between connector (A) and (C) as shown in [Figure below].

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

   Courtesy of KIA MOTORS AMERICA, INC.

2. Disconnect connector (B), and measure for resistance between connector (C) and (B1) and between (B2) and (A) as shown in [Figure below].

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

Courtesy of KIA MOTORS AMERICA, INC.

1. 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 [Figure below].

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

Courtesy of KIA MOTORS AMERICA, INC.