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Home >> Buick >> 2013 >> Encore Base, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 101 (Wiper System And Washer System) >> Diagnostic Information and Procedures >> DTC B370B: Rear Wiper Function >> Circuit/System Verification
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Circuit/System Verification

WARNING: This page is about a different car, the 2016 Chevrolet Trax and 2016 Buick Encore. However, it is still accessible from the selected car via links, so may be relevant.
  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 Scan Tool Rear Wiper Switch Parameter changes between ON and OFF when cycling the rear wiper switch ON and OFF.
    • If the parameter does not change
    • Refer to Circuit/System Testing - Rear Wiper/Washer Switch Malfunction
    • If the parameter changes
  4. Verify the M45 Rear Wiper Motor cycles when commanding the rear wiper ON with the rear wiper switch
    • If the M45 Rear Wiper Motor does not cycle 

      Refer to Refer to Circuit/System Testing - Rear Wiper Motor Malfunction

    • If the M45 Rear Wiper Motor cycles 
  5. Verify the M45 Rear Wiper Motor returns to the park position when the rear wipers are turned OFF
    • If the M45 Rear Wiper Motor does not return to the park position 

      Refer to Circuit/System Testing - Rear Wiper Motor Malfunction

    • If the M45 Rear Wiper Motor returns to the park position 
  6. All OK.
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