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Home >> Cadillac >> 2017 >> CT6 Plug-In >> Repair and Diagnosis >> Electrical >> Body Electrical >> Hybrid/EV System Controls >> Diagnostic Information and Procedures >> DTC P16F4: Control Module Transmission Range Switch Input Circuitry Performance >> Circuit/System Verification
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Circuit/System Verification

  1. Verify DTC P1824, P182A-P182F, P1838-P1841, P18B5-P18BA, P18BC, P18BF, P18C0, P18C2 or P18C3 is not set.
    • If none of the DTCs are set 
  2. Verify that DTC P16F4 is not set.
    • If the DTC is set 
    1. Program the T6 Power Inverter Module.
    2. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
    3. Verify the DTC does not set.
      • If the DTC sets, replace the T6 Power Inverter Module.
      • If the DTC does not set
    4. All OK
    • If the DTC is not set 
  3. All OK
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