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Home >> Chevrolet >> 2001 >> Camaro Base, 2D Convertible, Automatic >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Control System Self-Diagnostics - 3.8L >> Diagnostic Tests >> DTC P1523: Commanded & Actual Throttle Position Mismatch >> Diagnostic Procedures

Diagnostic Procedures

  1. If powertrain diagnostic system check was performed, go to next step. If powertrain diagnostic system check was not performed, go to POWERTRAIN DIAGNOSTIC SYSTEM CHECK  under DIAGNOSTIC SYSTEM CHECKS. After performing powertrain diagnostic system check, go to next step.
  2. Using scan tool, recheck DTCs. If any other DTCs are set, diagnose affected DTCs first. See DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no other DTCs are set, go to next step.
  3. Turn ignition off for 15 seconds. Turn ignition on, with engine off. Allow accelerator pedal to rest at idle stop for 20 seconds. Using scan tool, observe the indicated throttle position parameter. If throttle position is within 10.8-23.2 percent, go to step  6. If throttle position is not within 10.8-23.2 percent, go to next step.
  4. Remove throttle body assembly. Check for any obstructions preventing throttle blade from returning to default position. If an obstruction is found, go to next step. If no obstruction is found, go to step  6.
  5. Remove obstruction. After repairs, go to step  7.
  6. Replace throttle body assembly. After replacing throttle body, go to next step.
  7. Using scan tool, clear DTCs. Turn ignition off for at least 30 seconds. Start engine and allow it to reach normal operating temperature. Operate vehicle within conditions for setting this DTC. If scan tool indicates that this test ran and passed, go to next step. If scan tool does not indicate that this test ran and passed, go to step  2.
  8. Using scan tool, select CAPTURE INFO, REVIEW INFO function. If any undiagnosed DTCs are displayed, go to applicable DTC test. See DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no undiagnosed DTCs are displayed, system is okay.
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