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Home >> Cadillac >> 2014 >> ELR >> Repair and Diagnosis >> Accessories & Equipment >> Cruise Control Systems >> Diagnostic Information and Procedures >> DTC P15F6: Torque Request Signal Message Counte (Distance Sensing Cruise Control Module) >> Circuit/System Verification
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Circuit/System Verification

NOTE:
  • DTC P15F6 is an informational DTC.
  • Diagnose all other K20 Engine Control Module DTCs prior to DTC P15F6.
  • Do not replace the K14 Distance Sensing Cruise Control Module or K20 Engine Control Module if DTC P1553 or P15F6 are stored as history DTCs. This is a known issue that has no impact to system function and does not require any additional repair, programming or module replacement.
  1. Verify there are no other K20 Engine Control Module or communication DTCs set.
    • If a DTC is not set 
  2. Complete the diagnosis by looking for an intermittent serial data circuit fault. Refer to Scan Tool Does Not Communicate with High Speed GMLAN Device .
    • If an intermittent serial data circuit fault is found 

      Repair as necessary.

    • If an intermittent serial circuit fault is not found 
  3. Clear DTCs and operate the vehicle in the conditions that the customer experienced.
  4. Verify DTC P15F6 does not set.
    • If the DTC sets 

      Replace K14 Distance Sensing Cruise Control Module.

    • If the DTC does not set 
  5. All OK.
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