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Home >> Chevrolet >> 2018 >> Spark LT, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 28 (Wiper System And Washer System) >> Diagnostic Information and Procedures >> DTC B370B: Rear Wiper Function Control Circuit >> Circuit/System Verification

Circuit/System Verification

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  1. Ignition ON.
  2. Verify the scan tool Rear Closure Ajar Switch parameter changes between Inactive and Active when opening and closing the liftgate.
    • If the parameter changes 
  3. Verify the rear wiper turns ON and OFF when commanding the Rear Wiper Active and Inactive with a scan tool.
    • If the rear wiper does not turn ON and OFF 

      Refer to Circuit/System Testing

    • If the rear wiper turns ON and OFF 
  4. All OK.
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