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Home >> Cadillac >> 2013 >> Escalade Hybrid, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 4 (Engine Cooling System) >> Diagnostic Information and Procedures >> DTC P0480, P0481, or P0482 (with HP2) >> Component Testing

Component Testing

WARNING: This page is about a different variant/trim than selected.
  1. Ignition OFF, disconnect the KR20 Cooling Fan Relay.
  2. Test for 50-90 Ω between terminals 85 and 86.
    • If not within the specified range, replace the KR20 Cooling Fan Relay.
  3. Measure the resistance between the terminals listed below:
    • 30 and 86
    • 30 and 87
    • 30 and 85
    • 85 and 87

      The DMM should display OL.

    • If less than the specified range, replace the KR20 Cooling Fan Relay.
  4. Test the KR20E Cooling Fan Speed Control Relay for less than 2 Ω between terminals 30 and 87A.
    • If greater than the specified range, replace the KR20E Cooling Fan Speed Control Relay.
  5. Connect a 20 A fused jumper wire between relay terminal 85 and B+. Connect a jumper wire between relay terminal 86 and ground. Test for less than 2 Ω between terminals 30 and 87.
    • If greater than the specified range, replace the KR20 Cooling Fan Relay.
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