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Home >> Toyota >> 1996 >> Tercel Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Tests W/Codes >> Circuit Tests >> DTC P0510 - Closed Throttle Position (CTP) Switch Malfunction >> Diagnosis & Repair (Using OBD-II Scan Tester)
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Diagnosis & Repair (Using OBD-II Scan Tester)

  1. Ensure ignition is off. Disconnect TP sensor connector. Turn ignition on. Using DVOM, measure voltage between terminals No. 1 (Brown wire) and No. 2 (Yellow/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 an open in wiring harness between TP sensor and ECM. See appropriate wiring diagram in WIRING DIAGRAMS article. Repair as necessary. If wiring is okay, replace ECM and retest.
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