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Home >> Chevrolet >> 2015 >> Cruze LT, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 14 (Engine Controls And Fuel - 2.0L (LUZ) Diesel - DTC P2122 To DTC P2689 And Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P2687-P2689: Fuel Heater Relay Control Circuit >> Component Testing >> Relay Test

Relay Test

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  1. Ignition OFF, disconnect the applicable relay.
  2. Test for 70-110 Ω between terminals 85 and 86 or 1 and 2 of the relay.
    • If not within 70-100 Ω 

      Replace the KR22 Fuel Heater Relay.

    • If within 70-100 Ω 
  3. Test for infinite resistance between the following terminals listed below:
    • 30 and 86 or 3 and 1
    • 30 and 87 or 3 and 5
    • 30 and 85 or 3 and 2
    • 85 and 87 or 2 and 5
      • If less than infinite resistance 

        Replace the KR22 Fuel Heater Relay.

      • If infinite resistance 
  4. Install a 20 A fused jumper wire between relay terminal 85 and B+. Install a jumper wire between relay terminal 86 or 1 and ground.
  5. Test for less than 2 Ω between terminals 30 and 87.
    • If 2 Ω or greater 

      Replace the KR22 Fuel Heater Relay.

    • If less than 2 Ω 
  6. All OK.