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Home >> Cadillac >> 2018 >> Escalade ESV Platinum, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Transfer Case - Mp 3023/3024 (NQH)) >> Diagnostic Information And Procedures >> DTC P185F Or P279A, P279B, P279C: Transfer Case Range (Not L83) >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.
  1. Ignition - On/Vehicle - In Service Mode & Engine - Off
  2. Verify DTC P0502, P0503, P0721, P0722, P0723, P077C, P077D, P2160, P2161 is not set.
    • Go to next step: If none of the DTCs are set 
  3. Ignition On - Engine Running - Greater than 1 min
  4. Ignition/Vehicle Off, key out of the ignition/keyless start transmitter 1 m (3 ft) from the vehicle and all vehicle systems Off.
    NOTE: It may take up to 2 min for all vehicle systems to power down.

    - Greater than 2 min

  5. Ignition - On/Vehicle - In Service Mode & Engine - Off
  6. Verify DTC P17D4, P185F, P279A, P279B, P279C is only set as a history DTC.
    • If any of the DTCs are set  Refer to Circuit/System Testing
    • If any of the DTCs are set as history  Refer to Diagnostic Aids  before proceeding with Circuit/System Testing.
    • Go to next step: If none of the DTCs are set 
  7. Clear All Vehicle DTCs
  8. 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.
  9. Verify DTC P17D4, P185F, P279A, P279B, P279C is not set.
    • If the DTC is set 

      Refer to Circuit/System Testing below

    • Go to next step: If the DTC is not set 
  10. All OK.
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