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Home >> Chevrolet >> 2012 >> Cruze Eco, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 138 (Engine Controls And Fuel - 2.0L - DTC P0243 To DTC P0690) >> DTC P0685, P0686, P0687, P0689, or P0690 >> Component Testing

Component Testing

WARNING: This page is about a different car, the 2010 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
  1. Measure for 70-110 ohms between terminals 85 and 86 of the KR75 powertrain relay.
    • If the resistance is not within the specified range, replace the KR75 powertrain relay.
  2. Measure for infinite resistance between following terminals and the KR75 powertrain relay:
    • Terminals 30 and 86
    • Terminals 30 and 87
    • Terminals 30 and 85
    • Terminals 85 and 87
    • If continuity is detected, replace the KR75 powertrain relay.
  3. Connect a 20 A fused jumper wire from the positive terminal of the battery to relay terminal 85. Connect a jumper wire from the negative terminal of the battery to relay terminal 86. Measure for less than 2 ohms between terminals 30 and 87 of the relay.
    • If the resistance measures more than 2 ohms, replace the KR75 powertrain relay.
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