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4.5L Digital Fuel Injected Cadillac Brougham I

  1. Ensure throttle is against idle speed stop screw. With ignition on and engine off, enter diagnostics on climate control panel.
  2. Note throttle angle displayed in diagnostics on ECM parameter P.0.1 TPS. Displayed reading should be -1.0°-1.0°. If reading is incorrect, loosen TPS screws and rotate TPS to achieve a parameter display of -.5°-.5° (.45-.55 volts). Tighten TPS screws securely and recheck adjustment.