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Home >> Cadillac >> 2013 >> Escalade Hybrid, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 6 (Automatic Transmission - 6L80/6L90 - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P0842 or P0843 >> Circuit/System Verification

Circuit/System Verification

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  1. Engine idling in Park with parking brake applied, and drive wheels chocked.
  2. Verify the scan tool parameters listed below display the correct values for each gear range while placing the gear select lever in Park, Reverse, and Neutral position. Refer to Transmission Fluid Pressure Switch Logic for the correct gear range states.
    • Transmission Fluid Pressure Switch 1
    • Transmission Fluid Pressure Switch 3
    • Transmission Fluid Pressure Switch 4
    • Transmission Fluid Pressure Switch 5
    • If the correct state is displayed 
  3. Place the gear select lever in Drive range.
  4. Verify the scan tool parameters listed below display the correct values for each gear range while commanding the scan tool to Shift Transmission Gear through all forward ranges. Refer to Transmission Fluid Pressure Switch Logic for the correct gear range states.
    • Transmission Fluid Pressure Switch 1
    • Transmission Fluid Pressure Switch 3
    • Transmission Fluid Pressure Switch 4
    • Transmission Fluid Pressure Switch 5
    • If the correct state is displayed 
  5. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observe from the Freeze Frame/Failure Records data.
  6. Verify the DTC does not set.
    • If the DTC does not set 
  7. All OK.