[Electric A/C Compressor Inverter Inspection]

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To check the compressor inverter, measure the resistance value of the compressor's high voltage pin, low voltage pin and insulation.

High voltage pin

Normal resistance value: 100 Ω;↑

Abnormal resistance: 100 Ω;↑

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Low voltage pin
1. Measure CAN HIGH/LOW Resistance
  - Measure terminals 2 and 5.
    Normal: 120 Ω;
    
    Abnormal: inverter short-circuited (= 0 Ω;)
2. Measure CAN Ground Resistance
  - Measure terminals 1 and 2/1 and 5.
    Normal: 13~14 KΩ;/200~600 KΩ; (High Performance DSP Specifications)
    
    Abnormal: inverter short-circuited (=0Ω;)
3. Measure Interlock HIGH/LOW Resistance measure (Connect high voltage connector (A) and measure low voltage (B) 3 and 6 resistance.)
  Normal: Below 1.0 Ω;
  
  Abnormal: MΩ;

Courtesy of KIA MOTORS AMERICA, INC.

Information

Courtesy of KIA MOTORS AMERICA, INC.

Pin No.	Function	Pin No.	Function
1	GND 12V	4	IG 12V
2	CAN LOW	5	CAN HIGH
3	Interlock (-)	6	Interlock (+)

Compressor insulation resistance measurement.
Normal resistance value: check insulation resistance (Minimum: 100 MΩ;) (@500 VDC, no coolant)

Courtesy of KIA MOTORS AMERICA, INC.