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Home >> Kia >> 2003 >> Rio Base, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P1506 & DTC P1508 >> Test Procedure
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Test Procedure

  1. Turn ignition off. Disconnect IAC valve 3-pin harness connector. See Figure and ECM harness connector "B03". See Figure . Turn ignition on. Measure voltage between ground and IAC valve connector terminals No. 1 (White wire) and No. 3 (Green wire). Voltage should be below 0.5 volts. If voltages are as specified go to next step. If any voltage is not as specified, repair short circuit as necessary. Go to step  3 .
  2. Turn ignition off. Measure resistance at IAC valve opening and closing coils (component side). See IDLE AIR CONTROL VALVE COIL RESISTANCE TEST  table. If resistances are as specified, go to next step. If any resistance is not as specified, temporarily install a known good IAC valve and check for proper operation. If problem is corrected, replace valve. Go to step  3 .
    IDLE AIR CONTROL VALVE COIL RESISTANCE TEST

    IAC Valve Coils Measure Resistance Between IAC Valve Terminal No. Resistance Specifications
    Opening Coil 1 & 2 16.5-18.5 Ohms At 68°F (20°C)
    Closing Coil 2 & 3 14.5-16.5 Ohms At 68°F (20°C)
  3. After repair, return vehicle to original condition. Clear codes using Hi-Scan Pro/Kia Data Pro Scan tool or equivalent. Verify repairs by driving vehicle and monitoring for pending codes. If DTC is set during test drive, follow appropriate DTC test procedure.
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