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 to OFF position and disconnect KS and ECM connectors.
2. Measure resistance between KS harness connector terminal 2 and ECM harness connector terminal 54.
3. Measure resistance between KS harness connector terminal 1 and ECM harness connector terminal 10.

Fig 1: Measuring Resistance Between KS Harness Connector Terminal 1 & ECM Harness Connector Terminal 10

Courtesy of HYUNDAI MOTOR CO.

• Specifications: below 1ohm 

Does each resistance indicate continuity? 

Yes: Go to next

No: Repair open in harness.

1. Measure resistance between KS harness connector terminal 1 and chassis ground.
2. Measure resistance between KS harness connector terminals 1 and 2.

Fig 2: Measuring Resistance Between KS Harness Connector Terminals 1 & 2

Courtesy of HYUNDAI MOTOR CO.

• Specifications: infinite 

Does each resistance indicate open? 

Yes: Go to next

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

1. Turn ignition switch to ON position.
2. Measure voltage between KS harness connector terminal 1 and chassis ground.

Fig 3: Measuring Voltage Between KS Harness Connector Terminal 1 & Chassis Ground

Courtesy of HYUNDAI MOTOR CO.

• Specifications: below 0.5V 

Is voltage within specifications? 

Yes: Go to next

No: Repair short to power in harness.

1. Reconnect the KS and ECM connectors.
2. Connect a Hi-Scan (Pro) to the KS.
3. Start the engine and monitor the KS signal at idle.

Is KS signal normal? 

Yes: Proceed with ECM PROBLEM PROCEDURE  .

No: Replace KS.