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Home >> GMC >> 2020 >> Terrain Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 7 (Electronic Transmission Range Select) >> Diagnostic Information and Procedures >> DTC P073D, P073E, P07E4, P07E5, P16F4, P1769, P1772-P1774, P1778, P177A, P1787, P1789, P178A-P178E, P17CF, P17D5, P17F3, P187F, or P188A (with MHG) >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2020 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
  1. Verify all other Transmission related faults are not present.
    • Go to next step: If Transmission related faults are not present 
  2. Verify K173 Transmission Range Control Module is mounted securely and if it has a linkage ensure the linkage from Transmission Range Control Module to Transmission is adjusted properly with no excessive play.
    • If play is found in the mounting of the K173 Transmission Range Control Module or linkage 

      Resolve issue and perform K173 Transmission Range Control Module learn procedure.

    • Go to next step: If no play is found in the mounting of the K173 Transmission Range Control Module or linkage 
  3. Check for updated software in K173 Transmission Range Control Module.
    • If software is not current 

      Perform the programming and learn procedure for the K173 Transmission Range Control Module.

    • Go to next step: If software is up to date 
  4. Check for updated software in K20 Engine Control Module.
    • If software is not current 

      Perform the programming for the K20 Engine Control Module.

    • Go to next step: If software is up to date 
  5. Replace the K20 Engine Control Module
  6. Verify above mentioned DTC's are not set.
    • If above mentioned DTC's are set 

      Replace the K173 Transmission Range Control Module

    • Go to next step: If above mentioned DTC's are not set 
  7. All OK.
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