LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2017 >> Spark LT, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 18 (Wiring Systems And Power Management - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> Vehicle Will Not Change Power Mode >> 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. Verify DTC U1814 is not set.
    • Go to next step: If DTC is not set 
  2. Ignition ON.
  3. Verify the scan tool power mode parameters change when cycling the S39 Ignition Switch between OFF, ACCESSORY, ON, and CRANK.
    • If the power mode parameters do not change 

      Refer to Circuit/System Testing below.

    • Go to next step: If the power mode parameters change 
  4. All OK.
scientia non olet · About LEMON Manuals