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Home >> Kia >> 2015 >> Optima EX >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System Diagnosis (2 Of 3) - 2.4L (Except HEV) >> DTC P0564: Cruise Control Multi-Function Input A Circuit >> Wiring Inspection >> Signal Circuit Inspection

Signal Circuit Inspection

■ Check Signal Circuit Voltage 

  1. IG key OFF.
  2. Disconnect 'CRUISE REMOCON SWITCH' connector.
  3. IG key ON.
  4. Measure voltage between 'Signal (Cruise sw)' terminal of 'CRUISE REMOCON SWITCH' harness connector and chassis ground.

    Specification :  4.8V ~ 5.1V

  5. Is the measured value within specification?

    YES 

    NO 

    • Go to CHECK SHORT IN SIGNAL CIRCUIT procedure below.

■ Check Short in Signal Circuit 

  1. IG key OFF.
  2. Disconnect 'CRUISE REMOCON SWITCH' connector and Cluster connector.
  3. Check resistance between 'Signal (Cruise sw)' terminal and 'CRUISE MAIN' terminal of 'CRUISE REMOCON SWITCH' harness connector.
  4. Check resistance between 'Signal (Cruise sw)' terminal and 'Ground (Cruise sw)' terminal of 'CRUISE REMOCON SWITCH' harness connector.

    Specification :  Infinite

  5. Is the measured value within specification?

    YES 

    • Go to CHECK OPEN IN SIGNAL CIRCUIT procedure below.

    NO 

■ Check Open in Signal Circuit 

  1. IG KEY OFF.
  2. Disconnect 'CRUISE REMOCON SWITCH' connector and Cluster connector.
  3. Measure resistance between 'Signal (Cruise sw)' terminal of 'CRUISE REMOCON SWITCH' harness connector and 'Signal (Cruise sw)' terminal of PCM connector.

    Specification :  Below 1.0Ω

  4. Is the measured value within specification?

    YES 

    NO 

    • Repair open between 'Signal (Cruise SW)' terminal of 'CRUISE REMOCON SWITCH' harness connector and 'Signal (Cruise sw)' terminal of PCM connector, and go to "VERIFICATION OF VEHICLE REPAIR " procedure.