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Home >> Chevrolet >> 2007 >> Chevy Express G2500, Van Cargo, 6.6 6 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 19 (Engine Control System & Fuel System - 6.6L (LLY) - DTC P2544 To DTC P268A) >> DTC P2563 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.
  1. If DTCs P003A, P0045, P0698, P0699, P2564, P2565 are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle for further information.
  2. Engine running, observe the TC Vane Position Sensor and the TC Desired Vane Position Sensor parameters. Command the TC vane position sensor in 5 percent increments, from 0-100 percent. The TC Vane Position Sensor and the Desired TC Vane Position parameters should remain equal to or near the commanded TC Vane Position.
  3. Engine running at idle speed, observe the scan tool TC Vane Position Sensor and the Desired TC Vane Position parameters while slowly increasing the engine speed to 2,500 RPM and slowly returning to idle speed.
    • The TC Vane Position Sensor parameter should remain near or equal to the Desired TC Vane Position parameter throughout the engine speed range.
  4. Engine running, observe the DTC information with a scan tool. DTC P2563 should not set.
  5. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame Records data.
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