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Home >> Cadillac >> 2010 >> SRX 2.8 4 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel System - 2.8L, 3.0L - DTC P0300 To DTC P0455 >> DTC P0411 >> Component Testing

Component Testing

  1. Ignition OFF, disconnect the KR25 secondary air injection pump relay.
  2. Test for 70-110 Ω between terminals 85 and 86.
    • If the resistance is not within the specified range, replace the KR25 secondary air injection pump relay.
  3. Test for infinite resistance between the following terminals:
    • 86 and 87
    • 86 and 30
    • 85 and 87
    • 87 and 30
    • If not the specified value, replace the KR25 secondary air injection pump relay.
  4. Install a 20 A fused jumper wire between relay terminal 86 and 12 V. Install a jumper wire between relay terminal 85 and ground. Test for less than 2 Ω between terminals 87 and 30.
    • If greater than the specified range, replace the KR25 secondary air injection pump relay.
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