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Home >> Toyota >> 1997 >> T100 Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Tests W/Codes - 2.7L >> Circuit Tests >> DTC P0510: Closed Throttle Position (CTP) Switch Malfunction >> Diagnosis & Repair (Using OBD-II Scan Tool)
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Diagnosis & Repair (Using OBD-II Scan Tool)

  1. Ensure ignition is off. Disconnect TP sensor connector. Turn ignition on. Using DVOM, measure voltage between terminals No. 3 (Yellow/Blue wire) and No. 4 (Brown/Black wire) at TP sensor wiring harness connector. If voltage is 9-14 volts, replace TP sensor and retest. If voltage is not 9-14 volts, go to next step.
  2. Turn ignition off. Check for open circuit in wiring harness between TP sensor and ECM. See appropriate wiring diagram in WIRING DIAGRAMS - 2.7L article. Repair wiring as necessary. If wiring harness is okay, replace ECM and retest.
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