Signal Circuit Inspection

CHECK A/T control relay harness
1. Ignition "OFF".
2. Disconnect the "A/T CONTROL RELAY" connector.
3. Measure the voltage between terminal "4" of the "A/T CONTROL RELAY" harness connector and chassis ground.
4. Turn ignition switch OFF → ON
  Specification: 12V is measured only for approx. 0.5sec
  
  Fig 1: Measuring Voltage Between Terminal 4 Of A/T Control Relay Harness Connector And Chassis Ground
  Courtesy of HYUNDAI MOTOR CO.
5. Is voltage within specifications?
  Yes:
  - Go to Step 2.
  No:
  - Check for open in harness. Repair as necessary and Go to "VERIFICATION OF VEHICLE REPAIR " procedure.
  - If signal circuit is OK. Substitute with a known-good PCM/TCM and check for proper operation. If the problem is.
CHECK Supplying Power to solenoid valve harness
1. Ignition "OFF".
2. Disconnect the "A/T CONTROL RELAY" and PCM/TCM connector.
3. Measure the resistance between terminal "3" of the "A/T CONTROL RELAY" harness connector and terminal "7, 19" of the PCM/TCM harness connector.
  Specification: Approx. 0 Ω
  
  Fig 2: Measuring Resistance Between Terminal 3 Of A/T Control Relay Harness Connector And Connector Terminal 7, 19
  Courtesy of HYUNDAI MOTOR CO.
4. Is resistance within specifications?
  Yes:
  - Go to "GROUND CIRCUIT INSPECTION " procedure.
  No:
  - Check for Open in C-41 joint connector.
  - Check for open in harness. Repair as necessary and Go to "VERIFICATION OF VEHICLE REPAIR " procedure.