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Home >> Chevrolet >> 2015 >> Cruze LT, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 86 (Engine Controls And Fuel - 1.4L (LUJ LUV) - DTC P0300 To DTC P2635 And Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P0685, P0686, P0687, P0689, P0690, or P1682: Engine Controls Ignition Relay >> Component Testing

Component Testing

WARNING: This page is about a different car, the 2015 Chevrolet Trax and 2015 Buick Encore. However, it is still accessible from the selected car via links, so may be relevant.

Relay Test

  1. Ignition OFF, disconnect the KR75 Engine Controls Ignition Relay.
  2. Test for 70-110 Ω between terminals 85 and 86:
    • If less than 70 Ω or greater than 110 Ω 

      Replace the KR75 Engine Controls Ignition Relay.

    • If between 70-110 Ω 
  3. Test for infinite resistance between the terminals listed below:
    • 30 and 86
    • 30 and 87
    • 30 and 85
    • 85 and 87
    • If less than infinite resistance 

      Replace the KR75 Engine Controls Ignition Relay.

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

      Replace the KR75 Engine Controls Ignition Relay.

    • If less than 2 Ω 
  6. All OK.
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