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Home >> Buick >> 2017 >> Envision Base >> Repair and Diagnosis >> Accessories & Equipment >> Wiper/Washer Systems >> Wiper System And Washer System >> Diagnostic Information and Procedures >> Rear Washer System Malfunction >> Circuit/System Verification

Circuit/System Verification

  1. Ignition ON.
  2. Verify the scan tool Rear Washer Relay Command parameter changes between Active and Inactive when cycling the rear washer switch ON and OFF.
    • If the parameter does not change 

      Refer to Circuit/System Testing - Rear Wiper/Washer Switch Malfunction

    • If the parameter changes 
  3. Verify the G19 Rear Window Washer Pump turns on and off when commanding the Rear Washer Relay Inactive and Active with the scan tool
    • If the G19 Rear Window Washer Pump does not turn ON and OFF 

      Refer to Circuit/System Testing - Rear Washer Pump Malfunction

    • If the G19 Rear Window Washer Pump turns ON and OFF 
  4. All OK.
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