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Home >> Dodge and Ram >> 1998 >> Durango 5.9 Z, Part Time >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - Engine Performance >> Self-Diagnostic Tests >> Test NTC-7A: Checking Throttle Position Sensor Calibration
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Test NTC-7A: Checking Throttle Position Sensor Calibration

NOTE: If vehicle is equipped with a diesel engine, check and adjust idle speed and throttle linkage as necessary before replacing Throttle Position (TP) sensor in following procedure.
  1. Turn ignition on. Using scan tool, read TP sensor voltage. Ensure throttle is fully closed and against throttle stop. If voltage is more than 0.92 volt on TJ, XJ and ZJ bodies or 1.5 volts on all other bodies with throttle closed, replace TP sensor and perform TEST VER-5A: ROAD TEST FOR OBD-II TROUBLE CODES  on AB body, or TEST VER-2A: ROAD TEST VERIFICATION  on all other bodies. If voltage is not as specified, go to next step.
  2. Observe scan tool while slowly opening throttle to wide open position. If voltage change is not smooth, replace TP sensor and perform TEST VER-5A: ROAD TEST FOR OBD-II TROUBLE CODES  on AB body, or TEST VER-2A: ROAD TEST VERIFICATION  on all other bodies. If voltage change is smooth, go to next step.
  3. With throttle at closed position, wiggle wiring harness and connector going to TP sensor on throttle body while monitoring voltage. If voltage changes while wiggling wiring harness, repair wiring harness and connector as necessary and perform TEST VER-5A: ROAD TEST FOR OBD-II TROUBLE CODES  on AB body, or TEST VER-2A: ROAD TEST VERIFICATION  on all other bodies. If voltage does not change while wiggling wiring harness, go to next step.
  4. Start engine. Wiggle wiring harness and connector going to TP sensor on throttle body while monitoring engine speed (RPM). If RPM changes while wiggling wiring harness, repair wiring harness and connector as necessary and perform TEST VER-5A: ROAD TEST FOR OBD-II TROUBLE CODES  on AB body, or TEST VER-2A: ROAD TEST VERIFICATION  on all other bodies. If RPM does not change while wiggling wiring harness, go to next step.
  5. Inspect all related wiring and connections. Repair wiring and connectors as necessary and perform TEST VER-5A: ROAD TEST FOR OBD-II TROUBLE CODES  on AB body, or TEST VER-2A: ROAD TEST VERIFICATION  on all other bodies. If wiring and connectors are okay, TP sensor is operating properly. Test is complete.
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