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Home >> Chevrolet >> 2017 >> Spark LT, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 51 (Folding Top) >> Diagnostic Information and Procedures >> DTC B12F4 and B12F6 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON.
  2. Verify the M23 Folding Top Pump Motor turns on and off when commanding the KR149A Folding Top Pump Motor Relay 1 parameter On and Off with a scan tool.
    • If the motor does not turn on 

      Refer to Circuit/System Testing.

    • Go to next step: If the motor turns on 
  3. Verify the M23 Folding Top Pump Motor turns on and off when commanding the KR149B Folding Top Pump Motor Relay 2 parameter On and Off with a scan tool.
    • If the motor does not turn on 

      Refer to Circuit/System Testing.

    • Go to next step: If the motor turns on 
  4. All OK.