Check Open Circuit

• Continuity Check
• Voltage Check

If an open circuit occurs (as seen in Fig 1), it can be found by performing step  2 or step  3.

Fig 1: Electrical Circuit Inspection Procedure - For Open Circuit

Courtesy of HYUNDAI MOTOR CO.

Specification (Resistance)

1Ω or less --> Normal Circuit

1^MΩ or Higher --> Open Circuit

1. Disconnect connectors (A), (C) and measure resistance between connector (A) and (C) as shown in Fig 2.

   In Fig 2 the measured resistance of line 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 exact break point, check sub line of line 1 as described in next step.

   Fig 2: Electrical Circuit Inspection Procedure - Continuity Check Method

   Courtesy of HYUNDAI MOTOR CO.
2. Disconnect connector (B), and measure for resistance between connector (C) and (B1) and between (B2) and (A) as shown in Fig 3.

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

Fig 3: Electrical Circuit Inspection Procedure - Continuity Check Method

Courtesy of HYUNDAI MOTOR CO.

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 Fig 4.

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

Fig 4: Electrical Circuit Inspection Procedure - Voltage Check Method

Courtesy of HYUNDAI MOTOR CO.