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Home >> Mitsubishi >> 1996 >> 3000GT Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Circuit Tests >> DTC P0510 - Closed Throttle Position (TP) Switch Failure

DTC P0510 - Closed Throttle Position (TP) Switch Failure

NOTE: Closed TP switch is built into TP sensor. For DTC P0510 test purposes, TP sensor will be referred to as closed TP switch. For component terminal identification, see TP sensor under TERMINAL IDENTIFICATION  in this article. For wiring diagrams, see WIRING DIAGRAMS section.
  1. If using scan tool, go to step 3). Disconnect closed TP switch connector. Check for continuity between closed TP switch connector terminals No. 3 and No. 4. Go to next step.
  2. Depress accelerator pedal. Continuity should not exist. Release accelerator pedal. Continuity should exist. If continuity is not as specified, replace TP sensor. If continuity is as specified, go to step 4).
  3. Using scan tool, read closed TP switch state. With accelerator pedal released, scan tool should read ON. With accelerator pedal slightly depressed, scan tool should read OFF. If closed TP switch does not test as specified, replace TP sensor. If closed TP switch tests as specified, disconnect closed TP switch connector and go to next step.
  4. On Stealth and 3000GT, go to next step. Turn ignition switch to OFF position. Disconnect PCM connector. Using DVOM, check continuity between PCM connector terminal No. 67 (No. 87 on Diamante) and closed TP switch connector terminal No. 2 (No. 3 on Diamante without TCL). If continuity does not exist, repair wiring harness as necessary. If continuity exists, go to next step.
  5. Check continuity between chassis ground and closed TP switch connector terminal No. 1 (No. 4 on Diamante without TCL, Stealth and 3000GT). If continuity does not exist, repair wiring harness as necessary. If continuity exists, go to next step.
  6. Turn ignition switch to ON position. Check voltage between chassis ground and closed TP switch connector terminal No. 2 (No. 3 on Diamante without TCL, Stealth and 3000GT). If voltage is less than 4 volts, replace PCM. If voltage is more than 4 volts, condition required to set DTC is not present at this time. Go to next step.
  7. Test is complete. Intermittent problem may exist. Road test vehicle (if necessary) and attempt to duplicate conditions that caused original complaint. Recheck for DTCs. If no DTCs are displayed, go to INTERMITTENT DTCS  .
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