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Home >> Buick >> 2021 >> Enclave Preferred >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Electronic Transmission Range Select System >> Diagnostic Information and Procedures >> DTC P17A7-P17A9 >> Circuit/System Verification

Circuit/System Verification

  1. Ignition ON/Vehicle in Service Mode.
  2. Verify the scan tool Transmission Shift Interlock Switch 2 parameter changes to 50% - 60% when the Shift Interlock Button is depressed on the Transmission Shift Lever assembly.
    • If parameter does not change to 50% - 60% 

      Refer to Circuit/System Testing.

    • Go to next step: If parameter changes to 50% - 60% 
  3. All OK.
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