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DTC P0463: Fuel Gauge Sending Unit Circuit Input High: Testing

NOTE: Ensure freeze frame data has been recorded. Check for service bulletins and on-line information.
  1. Turn ignition on. Using scan tool, access PID/DATA MONITOR. Record PID data for FTL V. If FTL V PID is more than 4.9 volts, go to next step. If FTL V PID is 4.9 volts or less, go to TROUBLE SHOOTING - NO CODES article.
  2. Turn ignition off. Disconnect fuel gauge sending unit connector. Check for connector or terminal problems. If no problem is present, go to next step. If a problem is present, repair as necessary. After repair, go to step  7 .
  3. Turn ignition on. Connect a jumper wire between sending unit harness connector terminals "A" (Gray/Red wire) and "C" (Black/Orange wire). Using scan tool, access PID/DATA MONITOR. Record PID data for FTL V. If FTL V PID is more than .1 volt, go to next step. If FTL V PID is .1 volt or less, repair or replace sending unit. After repair, go to step  7 .
  4. Turn ignition on. Check voltage between sending unit harness connector terminals "A" (Gray/Red wire) and ground. If voltage is 4.5-5.5 volts or less, go to next step. If voltage is more than 4.5-5.5 volts, go to step  6 .
  5. Turn ignition off. Disconnect PCM connector. PCM is mounted to passenger floor, behind glove box. Check PCM terminals. If a problem is present, repair as necessary. After repair, go to step  7 . If no problem is present, repair open on Gray/Red wire between sending unit and PCM terminal No. 63. After repair, go to step  7 .
  6. Turn ignition off. Check continuity between sending unit harness connector terminal "C" (Black/Orange wire) and ground. If continuity is present, go to next step. If continuity is not present, repair open on Black/Orange wire between sending unit and ground. After repair, go to next step.
  7. Reconnect all components. Turn ignition on. Erase DTC. See CLEARING CODES in SELF-DIAGNOSTICS - INTRODUCTION - MIATA, MILLENIA, MPV & PROTEGE article. Recheck DTCs. If DTC P0462 is pending, replace PCM and go to next step. If DTC P0462 is not pending, go to next step.
  8. Perform after repair procedure. See AFTER REPAIR PROCEDURE  . If no DTC is present, testing is complete. If any DTC is present, go to appropriate test for diagnosis and repair.
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