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Home >> Cadillac >> 2016 >> XTS Premium, AWD >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission - 6T70 (M7U), 6T75 (M7V), Or 6T80 (Mhm) - Diagnostic Information And Procedures >> Diagnostic Information and Procedures >> DTC P0815, P0816, or P0826: Upshift Switch Circuit/Downshift Switch Circuit/Up and Down Shift Switch Circuit >> Component Testing

Component Testing

Tap Shift Switch Resistance

Switch Switch State Switch Terminals Resistance
S2L Transmission Manual Shift Switch - Left Open 1-2 5206-5754 Ω
S2L Transmission Manual Shift Switch - Left Closed 1-2 1300-1440 Ω
S2R Transmission Manual Shift Switch - Right Open 1-2 ∞ Ω
S2R Transmission Manual Shift Switch - Right Closed 1-2 606-670 Ω
S2R Transmission Manual Shift Switch - Right Open 1-3 598-662 Ω
S2R Transmission Manual Shift Switch - Right Closed 1-3 598-662 Ω
S2R Transmission Manual Shift Switch - Right Open 2-3 ∞ Ω
S2R Transmission Manual Shift Switch - Right Closed 2-3 Less than 5 Ω

Static Test

  1. Ignition OFF, disconnect the harness connector from the S2L Transmission Manual Shift Switch - Left and S2R Transmission Manual Shift Switch - Right.
  2. Test the resistance between the switch terminals and verify the resistance is within the specified value listed in the above table.
    • If the resistance is not within the specified range 

      Replace the affected switch.

    • If the resistance is within the specified range 
  3. All OK.