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Home >> Cadillac >> 1998 >> Eldorado Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Tests W/Codes >> Diagnostic Trouble Codes >> DTC P1524 - TP Sensor Learned Closed Throttle Angle >> Diagnostic Procedures

Diagnostic Procedures

  1. Perform POWERTRAIN ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK , then go to next step.
  2. Turn ignition on. Using scan tool, check if DTC P0121, P0122 or P0123 is present. If any of these DTC(s) are present, diagnose affected DTC(s) first. If these DTC(s) are not present, go to next step.
  3. Select ENGINE 2 mode. Ensure foot is off accelerator pedal. Observe TP SENSOR display. If TP sensor reads 6.5 degrees or greater, go to step 5). If TP sensor does not read 6.5 degrees or greater, go to next step.
  4. If TP sensor reads less than -6.5 degrees, go to step 8). If TP sensor does not read less than -6.5 degrees, go to next step.
  5. Check for binding throttle and cruise control cables. Repair as necessary. After repairs, go to step 9). If throttle and cruise control cables are okay, go to next step.
  6. Check for deposits on throttle body bore and blades. Clean as necessary. After cleaning throttle body, go to step 9). If throttle body did not need cleaning, go to next step.
  7. Turn ignition on. Using scan tool, select ENGINE 2. Ensure foot is off accelerator pedal. Observe TP SENSOR display. If reading outside of a range of -6.5 to 6.5 degrees, go to next step. If reading is as specified, go to step 9).
  8. Replace throttle body. After replacing throttle body, go to next step.
  9. Perform "TP Learn Procedure".
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