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Home >> Chevrolet >> 2009 >> Impala SS >> Repair and Diagnosis >> External Pages >> Different car >> Section 968 (Cruise Control System) >> Diagnostic Information and Procedures >> DTC P0703 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2008 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
  • Repair any brake system related DTCs before using this diagnostic.
  • This DTC may be stored as a history DTC without affecting the operation of the ECM. Do not replace the ECM if this DTC is stored only as a history DTC and is not retrieved as a current DTC.
  1. Ignition ON, observe for proper operation of the brake system including the brake lights. Refer to Exterior Lighting Systems Description and Operation .
  2. Ignition ON, perform the brake pedal position (BPP) sensor calibration procedure and verify the BPP is calibrated properly. Refer to Brake Pedal Position Sensor Calibration .
    • If the BPP will not calibrate properly, replace the BPP.
  3. Cycle the ignition, apply and release the brake pedal several times. Verify that DTC P0703 is only set as a history code.
    • If DTC P0703 sets as current in the ECM, replace the ECM.
  4. If the brake system tests normal, clear all codes. The vehicle is OK, do not replace the ECM.
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