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Home >> Chevrolet >> 2015 >> Cruze LT, Automatic Trans >> Repair and Diagnosis >> Engine Mechanical >> Cooling System (Mechanical) >> Engine Cooling System >> Diagnostic Information and Procedures >> Cooling Fan Always On (LUV, LUW or LWE) >> Component Testing

Component Testing

  1. Ignition OFF.
  2. Disconnect a KR20 Cooling Fan Relay.
  3. Test for 70-110 Ω between terminals 85/2 and 86/1. 95-135 Ω for the KR20F Cooling Fan Relay.
    • If less than or greater than the specified range 

      Replace the KR20 Cooling Fan Relay.

    • If within the specified range 
  4. Test for infinite resistance between the following terminals:
    • 30/3 and 86/1
    • 30/3 and 87/5
    • 30/3 and 85/2
    • 85/2 and 87/5
    • If less than infinite resistance 

      Replace the KR20 Cooling Fan Relay.

    • If infinite resistance 
  5. Install a 20 A fused jumper wire between relay terminal 85/2 and 12 V.
  6. Install a jumper wire between relay terminal 86/1 and ground.
  7. Test for less than 2 Ω between terminals 30/3 and 87/5.
    • If 2 Ω or greater 

      Replace the KR20 Cooling Fan Relay.

    • If less than 2 Ω 
  8. All OK.
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