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Home >> Hummer >> 2010 >> H3 Base, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 3.7L - DTC P0335 To DTC P1381 >> DTC P0685 or P0690 >> Component Testing

Component Testing

  1. Test for 70-110 Ω between terminals 85 and 86 of the KR75 powertrain relay.
    • If not within the specified range, replace the KR75 powertrain relay.
  2. Test for infinite resistance between the following terminals of the KR75 powertrain relay:
    • 30 and 86
    • 30 and 87
    • 30 and 85
    • 85 and 87
    • If not the specified value, replace the KR75 powertrain relay.
  3. Install a 20 A fused jumper wire between relay terminal 85 and 12 V. Install 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 KR75 powertrain relay.
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