Inspection Procedures

1. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.

   Are all connectors good? 

Yes: Go to next

No: Repair or replace it.

1. Turn ignition switch to OFF position and disconnect IATS connector.
2. Measure resistance between terminals 5 and 2 of the IATS connector.

Fig 1: Measuring Resistance Between Terminals 5 & 2 Of IATS Connector

Courtesy of HYUNDAI MOTOR CO.

• Refer to  SPECIFICATION   for more information. 

  Is resistance within specification? 

Yes: Go to next

No: Replace IATS.

1. Turn ignition switch to OFF position and disconnect IATS connector.
2. Turn ignition switch to ON position.
3. Measure voltage between terminal 2 of the IATS harness connector and chassis ground.

Fig 2: Measuring Voltage Between Terminal 2 Of IATS Harness Connector & Chassis Ground

Courtesy of HYUNDAI MOTOR CO.

• Specification: approximately B+ 

  Is voltage within specification? 

Yes: Go to next

No: Repair open or short to chassis ground in harness.

1. Turn ignition to OFF position and disconnect ECM connector.
2. Measure resistance between terminal 5 of the IATS harness connector and 56 of the ECM harness connector.
3. Measure resistance between terminal 1 of the IATS harness connector and 48 of the ECM harness connector.

Fig 3: Measuring Resistance Between Terminal Of IATS Harness Connector & Of ECM Harness Connector

Courtesy of HYUNDAI MOTOR CO.

• Specification: below 1ohm 

  Does each resistance indicate continuity? 

Yes: Go to next

No: Repair open in harness.

1. Turn ignition switch to ON position.
2. Check for short in IATS signal harness between terminal 5 of the IATS harness connector and chassis ground.

Fig 4: Checking For Short In IATS Signal Harness Between Terminal 5 Of IATS Harness Connector & Chassis Ground

Courtesy of HYUNDAI MOTOR CO.

• Specification: below 0.5V 

  Is voltage within specification? 

Yes: Proceed with ECM PROBLEM PROCEDURE  .

No: Repair short to power in harness.