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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 274 (Engine Controls - Self-Diagnostics - 2.2L) >> Diagnostic Tests >> DTC P1512: Throttle Position Sensor Minimum Learn Fault >> Diagnostic Procedures

Diagnostic Procedures

WARNING: This page is about a different car, the 2003 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
  1. Perform diagnostic system check - engine controls. See DIAGNOSTIC SYSTEM CHECK - ENGINE CONTROLS  under SELF-DIAGNOSTIC SYSTEM. After performing diagnostic system check - engine controls, go to next step.
  2. Are DTCs P1120 and P1220 also set? If yes, go to DTC P1120: THROTTLE POSITION SENSOR NO. 1 CIRCUIT  and DTC P1220: THROTTLE POSITION SENSOR NO. 2 CIRCUIT  . If no, go to next step.
  3. Observe the Freeze Frame/Failure Records for this DTC. Turn ignition off for 90 seconds. Turn ignition on, with engine off. Operate the vehicle within the conditions for running the DTC. See CONDITIONS FOR RUNNING DTC . You may also operate the vehicle within the conditions you observed from the Freeze Frame/Failure Records. Did the DTC fail this ignition? If yes, go to next step. If no, problem is intermittent. See INTERMITTENTS in TROUBLE SHOOTING - NO CODES - 2.2L & 3.0L VUE article.
  4. Remove the throttle body assembly. Did you find any obstructions preventing the throttle plate from returning to the minimum position? If no, go to step  6. If yes, go to next step.
  5. Remove the obstruction. After repairs, go to step  7.
  6. Replace the throttle body assembly. After replacing throttle body assembly, go to next step.
  7. Clear the DTCs with a scan tool. Turn ignition off for 90 seconds. Turn ignition on, with engine off. Operate the vehicle within the Conditions for Running the DTC. See CONDITIONS FOR RUNNING DTC . You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records. Did the DTC fail this ignition? If yes, go to step  2. If no, go to next step.
  8. With a scan tool, observe the stored information, Capture Info. Does the scan tool display any DTCs that you have not diagnosed? If yes, see DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no, system is okay.
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