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Home >> Cadillac >> 2021 >> CT4 Sport, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 21 (Wiring Systems And Power Management - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> Ignition Mode Switch Indicator Malfunction >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.
  1. Cycle the ignition between Run Mode and OFF.
  2. Verify the green Run Mode indicator turns on and off.
    • The Run Mode indicator does not turn on and off 
  3. Verify the scan tool Power Mode value Is Run
    • Go to next step: If the value is Run 
  4. Refer to Circuit/System - Testing Run/Crank Mode Indicator Malfunction.
    • Go to next step: The Run Mode indicator turns on and off 
  5. Cycle the ignition between Accessory Mode and OFF.
  6. Verify the Yellow Accessory indicator turns on and off.
    • If the indicator does not turn on and off 
  7. Verify the scan tool Power Mode value Is Accessory
    • Go to next step: If the value is Accessory 
  8. Refer to Circuit/System - Testing Accessory Mode Indicator Malfunction.
    • Go to next step: If the specified state 
  9. A fault is not currently present and may be an intermittent condition.
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