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

NOTE: Record freeze frame data. 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 problem is not present, go to next step. If a problem is present, repair as necessary and go to step  7 .
  3. Turn ignition on. Connect a fused jumper wire between fuel gauge sending unit harness connector terminals "A" (Gray/Red wire) and "C" (Black/Orange wire). See WIRING DIAGRAMS article. 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 fuel gauge sending unit. Go to step  7 .
  4. Turn ignition on. Check voltage between fuel gauge sending unit harness connector terminal "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 and go to step  7 . If no problem is present, repair open in Gray/Red wire between fuel gauge sending unit harness connector terminal "A" and PCM harness connector terminal No. 63. See Figure . Go to step  7 .
  6. Turn ignition off. Check continuity between fuel gauge 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 fuel gauge sending unit and ground. Go to next step.
  7. Reconnect all components. Turn ignition on. Erase DTC. See CLEARING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM. 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 DTC is not present, testing is complete. If any DTC is present, go to appropriate test for diagnosis and repair.
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